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Bronze TiO2 as a cathode host for lithium-sulfur batteries 认领
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作者 Wenjing Dong Di Wang +8 位作者 Xiaoyun Li Yuan Yao Xu Zhao Zhao Wang Hong-En Wang Yu Li Lihua Chen Dong Qian Bao-Lian Su 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第9期259-266,I0008,共9页
Lithium-sulfur batteries(LSBs)are very promising for large-scale electrochemical energy storage.However,dissolution and shuttling of lithium polysulfides(LiPSs)intermediates have severely affected their overall electr... Lithium-sulfur batteries(LSBs)are very promising for large-scale electrochemical energy storage.However,dissolution and shuttling of lithium polysulfides(LiPSs)intermediates have severely affected their overall electrochemical properties and limited their practical application.Designing polar cathode hosts that can effectively bind LiPSs and simultaneously promote their redox conversion is crucial for realizing high-performance LSBs.Herein,we report bronze TiO2(TiO2-B)nanosheets(~5 nm in thickness)chemically bonded with carbon as a novel multifunctional cathode host for advanced LSBs.Experimental observation and first-principles density functional theory(DFT)calculations reveal that the TiO2-B with exposed(100)plane and Ti^3+ions exhibited high chemical affinity toward polysulfides and effectively confined them at surface.Meantime,Ti^3+ions and interface coupling with carbon promoted electronic conductivity of the composite cathode,leading to enhanced redox conversion kinetics of LiPSs during charge/discharge.Consequently,the as-assembled TiO2-B/S cathode manifested high capacity(1165 mAh/g at 0.2 C),excellent rate capability(244 mAh/g at 5 C)and outstanding cyclability(572 mAh/g over 500cycles at 0.2 C).This work sheds insights on rational design and fabrication of novel functional electrode materials for beyond Li-ion batteries. 展开更多
关键词 Titanium dioxide CATHODE POLYSULFIDES Shuttle effect Lithium-sulfur batteries Electrochemistry Density functional theory
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Bonding VSe2 ultrafine nanocrystals on graphene toward advanced lithium-sulfur batterie 认领
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作者 Wenzhi Tian Baojuan Xi +4 位作者 Yu Gu Qiang Fu Zhenyu Feng Jinkui Feng Shenglin Xiong 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第10期2673-2682,共10页
Lithium–sulfur batteries have been attracting considerable research attention due to their high energy densities and low costs. However, one of their main challenges is the undesired shuttling of polysulfides, causin... Lithium–sulfur batteries have been attracting considerable research attention due to their high energy densities and low costs. However, one of their main challenges is the undesired shuttling of polysulfides, causing rapid capacity degradation. Herein, we report the first example of sulfiphilic VSe2 ultrafine nanocrystals immobilized on nitrogen-doped graphene to modify the battery separator for alleviating the shuttling problem. VSe2 nanocrystals provide numerous active sites for chemisorption of polysulfides as well as benefit the nucleation and growth of Li2S. Furthermore, the kinetic reactions are accelerated which is confirmed by higher exchange current density and higher lithium ion diffusion coefficient. And the first-principles calculations further show that the exposed sulfiphilic planes of VSe2 boost the redox of Li2S. When used as separators within the lithium sulfur batteries, the cell indicates greatly enhanced electrochemical performances with excellent long cycling stability and exceptional rate capability up to 8 C. Moreover, it delivers a higher areal capacity of 4.04 mAh·cm^−2 as well as superior cycling stability with sulfur areal loading up to 6.1 mg·cm^−2. The present strategy can encourage us in engineering novel multifunctional separators for energy-storage devices. 展开更多
关键词 sulfiphilic VSe2 lithium–sulfur batteries nucleation and growth of Li2S polysulfide electrocatalysis shuttle effect
Attapulgite nanorods assisted surface engineering for separator to achieve high-performance lithium–sulfur batteries 认领
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作者 Wenhao Sun Xiaogang Sun +5 位作者 Naseem Akhtar Chengming Li Weikun Wang Anbang Wang Kai Wang Yaqin Huang 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第9期364-374,I0011,共12页
Lithium-sulfur(Li-S)batteries have been recognized as one of the most promising candidates for nextgeneration portable electronic devices,owing to their extremely high energy density and low cost.However,the dissoluti... Lithium-sulfur(Li-S)batteries have been recognized as one of the most promising candidates for nextgeneration portable electronic devices,owing to their extremely high energy density and low cost.However,the dissolution of lithium polysulfides(LiPSs)and consequent"shuttle effect"seriously hinder the practical deployment of Li-S batteries.Herein,multi-metal oxide nanorods named attapulgite are proposed as multifunctional ionic sieve to immobilize LiPSs and further promote the regulation of LiPSs.Attapulgite,consisting of Al,Mg,Fe,Si and O ions,possesses more polar sites to immobilize LiPSs in comparison with single metal oxides.In addition,the catalytic nature(Fe ions)of attapulgite avails the LiPSs conversion reaction,which is further confirmed by the linear sweep voltammetry and electrochemical impedance spectroscopy.Benefited from the synergistic effect of multi-metal oxide and conductive carbon,the Li-S battery with the modified separator delivers remarkable discharge capacities of 1059.4 mAh g-1 and 792.5 mAh g-1 for the first and 200th cycle at 0.5 C,respectively.The work presents an effective way to improve the electrochemical performance of Li-S batteries by employing attapulgite nanorods assisted separator surface engineering. 展开更多
关键词 Surface engineering Multi-metal oxide SEPARATOR Shuttle effect Synergistic effect
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Recent advances in chemical adsorption and catalytic conversion materials for Li–S batteries 认领
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作者 Xiaodong Hong Rui Wang +3 位作者 Yue Liu Jiawei Fu Ji Liang Shixue Dou 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第3期144-168,共25页
Owing to their low cost,high energy densities,and superior performance compared with that of Li-ion batteries,Li–S batteries have been recognized as very promising next-generation batteries.However,the commercializat... Owing to their low cost,high energy densities,and superior performance compared with that of Li-ion batteries,Li–S batteries have been recognized as very promising next-generation batteries.However,the commercialization of Li–S batteries has been hindered by the insulation of sulfur,significant volume expansion,shuttling of dissolved lithium polysulfides(Li PSs),and more importantly,sluggish conversion of polysulfide intermediates.To overcome these problems,a state-of-the-art strategy is to use sulfur host materials that feature chemical adsorption and electrocatalytic capabilities for Li PS species.In this review,we comprehensively illustrate the latest progress on the rational design and controllable fabrication of materials with chemical adsorbing and binding capabilities for Li PSs and electrocatalytic activities that allow them to accelerate the conversion of Li PSs for Li–S batteries.Moreover,the current essential challenges encountered when designing these materials are summarized,and possible solutions are proposed.We hope that this review could provide some strategies and theoretical guidance for developing novel chemical anchoring and electrocatalytic materials for high-performance Li–S batteries. 展开更多
关键词 Chemical adsorption ELECTROCATALYSIS Li–S BATTERIES LITHIUM POLYSULFIDES SHUTTLE effect
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Phosphorene:a Potential 2D Material for Highly Efficient Polysulfide Trapping and Conversion 认领
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作者 PEI Zhibin LIU Yun +2 位作者 SUN Da ZHU Zixuan WANG Gongming 《高等学校化学研究:英文版》 SCIE CAS CSCD 2020年第4期631-639,共9页
Effectively trapping lithium polysulfide species and accelerating the reaction conversion kinetics are the main strategies to improve the performance of lithium-sulfur(Li-S)batteries.Since the researchers found in 201... Effectively trapping lithium polysulfide species and accelerating the reaction conversion kinetics are the main strategies to improve the performance of lithium-sulfur(Li-S)batteries.Since the researchers found in 2014 that two-dimensional(2D)phosphorene nanosheets could be exfoliated from the bulk black phosphorus,numerous researches have been devoted to exploring the phosphorene with unique properties for the application in Li-S batteries In this review.we summarize the recent theoretical and experimental progress of phosphorene for Li-S batteries.Be-sides,we also introduce the relationship between the interfacial interaction on phosphorene and the performance enhancement of Li-S batteries.Furthermore,future challenges and remaining opportunities for phosphorene in Li-s batteries are finally discussed. 展开更多
关键词 Phosphorene Lithium-sulfur battery Shuttle effect Catalytic conversion Enhanced redox kinetics
Sandwiching Sulfur into the Dents Between N,O Co-Doped Graphene Layered Blocks with Strong Physicochemical Confinements for Stable and High-Rate Li-S Batteries 认领
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作者 Mengjiao Shi Su Zhang +5 位作者 Yuting Jiang Zimu Jiang Longhai Zhang Jin Chang Tong Wei Zhuangjun Fan 《纳微快报:英文版》 SCIE EI CAS CSCD 2020年第11期13-24,共12页
The development of lithium-sulfur batteries(LSBs)is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect.Herein,an N,O co-doped graphene layered... The development of lithium-sulfur batteries(LSBs)is restricted by their poor cycle stability and rate performance due to the low conductivity of sulfur and severe shuttle effect.Herein,an N,O co-doped graphene layered block(NOGB)with many dents on the graphene sheets is designed as effective sulfur host for high-performance LSB s.The sulfur platelets are physically confined into the dents and closely contacted with the graphene scaffold,ensuring structural stability and high conductivity.The highly doped N and O atoms can prevent the shuttle effect of sulfur species by strong chemical adsorption.Moreover,the micropores on the graphene sheets enable fast Li^+transport through the blocks.As a result,the obtained NOGB/S composite with 76 wt%sulfur content shows a high capacity of 1413 mAh g^-1 at 0.1 C,good rate performance of 433 mAh g^-1 at 10 C,and remarkable stability with 526 mAh g^-1 at after 1000 cycles at 1 C(average decay rate:0.038%per cycle).Our design provides a comprehensive route for simultaneously improving the conductivity,ion transport kinetics,and preventing the shuttle effect in LSBs. 展开更多
关键词 GRAPHENE Physicochemical confinement Cycle stability Shuttle effect Li-S batteries
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Ether-compatible lithium sulfur batteries with robust performance via selenium doping 认领
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作者 Jin-Lei Qin Meng Zhao +1 位作者 Hong Yuan Jia-Qi Huang 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第7期199-201,I0007,共4页
The increasing demand of the green energy storage system encourages us to develop a higher energy storage system to take the place of the present lithium-ion batteries with limited energy/power densities[1,2].Among th... The increasing demand of the green energy storage system encourages us to develop a higher energy storage system to take the place of the present lithium-ion batteries with limited energy/power densities[1,2].Among the diverse candidates。 展开更多
关键词 Lithium–sulfur battery Lithium polysulfide Shuttle effect Se0.06 SPAN
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Tuning of interactions between cathode and lithium polysulfide in Li-S battery by rational halogenation 认领
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作者 Samson O.Olanrele Zan Lian +2 位作者 Chaowei Si Shuo Chen Bo Li 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第10期147-152,共6页
Li-S batteries have aroused intense interests as one of the most promising high-energy-density storage technology.However,the complex undesired shuttle effect induced by dissolution and diffusion of lithium polysulfid... Li-S batteries have aroused intense interests as one of the most promising high-energy-density storage technology.However,the complex undesired shuttle effect induced by dissolution and diffusion of lithium polysulfide intermediates remains the major setback of this technology.Chemical modification of carbon cathode through heteroatom-doping is widely accepted as an effective method to inhibit the shuttle effect in Li-S battery cathode.Herein,using first principle calculations,we systematically examined the interaction between halogenated graphene and lithium polysulfide species.It is found that the halogen dopants(F,Cl,Br,I)significantly modify the local electronic structure of adsorption site and further induce a polarization to trap the polysulfides.Interestingly,a concave curve is observed from F to I for lithium polysulfide adsorption rather than a linear relation.The exceptions demonstrated from iodine dopant is carefully analyzed and attributed to its unique charge state.Moreover,boron as second dopant further strengthens the interaction between halogenated graphene and polysulfide molecule.Based on halogenation strategy,lithium polysulfide/cathode interactions are tuned in a wide range,which can also be of great importance to accelerate redox reaction in Li-S battery.Overall,an effective method by halogenation is verified to regulate the adsorption of lithium polysulfide and also enhance the reaction kinetics of the Li-S battery system. 展开更多
关键词 Li-S battery HALOGENATION Shuttle effect CO-DOPING
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Catalytic Co9S8 decorated carbon nanoboxes as efficient cathode host for long-life lithium-sulfur batteries 认领
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作者 Weiwei Sun Yujie Li +5 位作者 Shuangke Liu Qingpeng Guo Yuhao Zhu Xiaobin Hong Chunman Zheng Kai Xie 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第8期2143-2148,共6页
Lithium sulfur(Li-S)batteries with high specific capacity and energy density can bring enormous opportunities for the nextgeneration energy storage systems.However,the severe dissolution and shuttle effect of lithium ... Lithium sulfur(Li-S)batteries with high specific capacity and energy density can bring enormous opportunities for the nextgeneration energy storage systems.However,the severe dissolution and shuttle effect of lithium polysulfides(LiPSs)is still the key issue that seriously impedes the development of practical Li-S batteries.Here,polar Co9S8 inlaid carbon nanoboxes(Co9S8@C NBs)have been investigated as cathode host for high-performance Li-S batteries.In this integrated structure,Co9S8 nanocrystals not only provide strong chemisorptive capability for polar LiPSs,but also act as a catalyst to accelerate polysulfide redox reactions;while carbon nanobox with large inner space can offer enough space to relieve the volume expansion and physically confine LiPSs’dissolution.As a result,the S/Co9S8@C NBs cathode exhibits high specific capacity at 1C and the capacity retention was~83%after 400 cycles,corresponding to an average decay rate of only~0.043%per cycle. 展开更多
关键词 Co9S8@C cathode host shuttle effect catalyst Li-S batteries
In-situ polymerized cross-linked binder for cathode in lithium-sulfur batteries 认领
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作者 Heng Ye Danni Lei +4 位作者 Lu Shen Bin Ni Baohua Li Feiyu Kang Yan-Bing He 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第2期570-574,共5页
Volume expansion and polysulfide shuttle effect are the main barriers for the commercialization of lithium-sulfur(Li-S) battery.In this work,we in-situ polymerized a cross-linked binder in sulfur cathode to solve the ... Volume expansion and polysulfide shuttle effect are the main barriers for the commercialization of lithium-sulfur(Li-S) battery.In this work,we in-situ polymerized a cross-linked binder in sulfur cathode to solve the aforementioned problems using a facile method under mild conditions.Polycarbonate diol(PCDL),triethanolamine(TEA) and hexamethylene diisocyanate(HDI) were chosen as precursors to prepare the cross-linked binder.The in-situ polymerized binder(PTH) builds a strong network in sulfur cathode,which could restrain the volume expansion of sulfu r.Moreover,by adopting functional groups of oxygen atoms and nitrogen atoms,the binder could effectively facilitate transportation of Li-ion and adsorb polysulfide chemically.The Li-S battery with bare sulfur and carbon/sulfur composite cathodes and cross-linked PTH binder displays much better electrochemical performance than that of the battery with PVDF.The PTH-bare S cathode with a mass loading of 5.97 mg/cm^2 could deliver a capacity of 733.3 mAh/g at 0.2 C,and remained 585.5 mAh/g after 100 cycles.This in-situ polymerized binder is proved to be quite effective on restraining the volume expansion and suppressing polysulfide shuttle effect,then improving the electrochemical performance of Li-S battery. 展开更多
关键词 CROSS-LINKED BINDER IN-SITU polymerization Volume expansion of SULFUR Shuttle effect suppression Lithium-sulfur BATTERIES
Single-atom catalysis enables long-life, high-energy lithium-sulfur batteries 认领
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作者 Zechao Zhuang Qi Kang +1 位作者 Dingsheng Wang Yadong Li 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第7期1856-1866,共11页
With high energy density and low material cost,lithium sulfur batteries(LSBs)emerge quite expeditiously as a fascinating energy storage system over the past decade.Broad applications of LSBs ranging from electric vehi... With high energy density and low material cost,lithium sulfur batteries(LSBs)emerge quite expeditiously as a fascinating energy storage system over the past decade.Broad applications of LSBs ranging from electric vehicles to stationary grid storage seem rather bright in recent literatures.However,there still exist many pressing challenges to be addressed because we do not yet fully understand and control the electrode-electrolyte interface chemistries during battery operation,such as polysulide shuttling and poor utilization of active sulfur.Single-atom catalysts(SACs)pave new possibilities of tackling the tough issues due to their decent applicability in the atomic-level identification of structure-activity relationships and reaction mechanism,as well as their structural tunability with atomic precision.This review comprehensively summarizes the very recent advances in utilization of highly active SACs for LSBs by stating and discussing the related publications,which involves catalyst synthesis routes,battery pertormance,catalytic mechanisms,optimization strategies,and promises to achieve long-lite,high-energy LSBs.We see that endeavors to employ SACs to modify sulfur cathode have allowed efficient polysulfide conversion and confinement,leading to the minimization of shuttle effect.Parallel efforts are being devoted to extending the scope of SACs to cell separator and lithium metal anode in order to unlock the full potential of LSBs.We also obtain mechanistic insights into battery chemistries and nature of SACs in their strong interactions with polysulfides through advanced in situ characterizations documented.Overall,acceleration in the development of LSBs by introducing SACs is noticeable,and this cutting edge needs more attentions to further promoting the design of better LSBs. 展开更多
关键词 single-atom catalysis lithium-sulfur battery polysulfide conversion shuttle effect atomic-level insight
Recent progress in fluorinated electrolytes for improving the performance of Li–S batteries 认领
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作者 Xiwen Wang Yuqing Tan +1 位作者 Guohong Shen Shiguo Zhang 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第2期149-170,共22页
Lithium–sulfur(Li–S) batteries represent a "beyond Li-ion" technology with low cost and high theoretical energy density and should fulfill the ever-growing requirements of electric vehicles and stationary ... Lithium–sulfur(Li–S) batteries represent a "beyond Li-ion" technology with low cost and high theoretical energy density and should fulfill the ever-growing requirements of electric vehicles and stationary energy storage systems. However, the sulfur-based conversion reaction in conventional liquid electrolytes results in issues like the so-called shuttle effect of polysulfides and lithium dendrite growth, which deteriorate the electrochemical performance and safety of Li–S batteries. Optimization of conventional organic solvents(including ether and carbonate) by fluorination to form fluorinated electrolytes is a promising strategy for the practical application of Li–S batteries. The fluorinated electrolytes, owing to the high electronegativity of fluorine, possesses attractive physicochemical properties, including low melting point,high flash point, and low solubility of lithium polysulfide, and can form a compact and stable solid electrolyte interphase(SEI) with the lithium metal anode. Herein, we review recent advancements in the development of fluorinated electrolytes for use in Li–S batteries. The effect of solvent molecular structure on the performance of Li–S batteries and the formation mechanism of SEI on the cathode and anode sides are analyzed and discussed in detail. The remaining challenges and future perspectives of fluorinated electrolytes for Li–S batteries are also presented. 展开更多
关键词 Lithium–sulfur BATTERIES ELECTROLYTE FLUORINATED solvents SHUTTLE effect SEI forming mechanism
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MoSe2 nanosheets as a functional host for lithium-sulfur batteries 认领
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作者 Lishun Meng Yuan Yao +5 位作者 Jing Liu Zhao Wang Dong Qian Liuchun Zheng Bao-Lian Su Hong-En Wang 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第8期241-247,I0009,共8页
Lithium-sulfur batteries(LSBs) hold great potential for large-scale electrochemical energy storage applications. Currently, the shuttle of soluble lithium polysulfide(LiPSs) intermediates with sluggish conversion kine... Lithium-sulfur batteries(LSBs) hold great potential for large-scale electrochemical energy storage applications. Currently, the shuttle of soluble lithium polysulfide(LiPSs) intermediates with sluggish conversion kinetics and random deposition of Li2S have severely degraded the capacity, rate and cycling performances of LSBs, preventing their practical applications. In this work, ultrathin MoSe2 nanosheets with active edge sites were successfully grown on both internal and external surfaces of hollow carbon spheres with mesoporous walls(MCHS). The resulting MoSe2@MCHS composite acted as a novel functional reservoir for Li PSs with high chemical affinity and effectively mediated their fast redox conversion during charge/discharge as elucidated by experimental observations and first-principles density functional theory(DFT) calculations. The as-fabricated Li-S cells delivered high capacity, superior rate and excellent cyclability. The current work presents new insights on the delicate design and fabrication of novel functional composite electrode materials for rechargeable batteries with emerging applications. 展开更多
关键词 MoSe2 Cathode host Lithium-sulfur batteries Shuttle effect ELECTROCHEMISTRY Density functional theory
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The novel quinolizidine derivate IMB-HDC inhibits STAT5a phosphorylation at 694 and 780 and promotes DNA breakage and cell apoptosis via blocking STAT5a nuclear translocation 认领
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作者 Wu-li Zhao Yan Xing +7 位作者 Cheng Ye Yu-han Qiu Yi Li Xiu-jun Liu Meng-yan Wang Chong-wen Bi Dan-qing Song Rong-guang Shao 《中国药理学报:英文版》 SCIE CAS CSCD 2020年第5期686-697,共12页
Sophoridine is a quinolizidine natural product and the exploration of its derivatives has been carried out,and the potent anticancer compound IMB-HDC was acquired.Although previous studies have revealed that some soph... Sophoridine is a quinolizidine natural product and the exploration of its derivatives has been carried out,and the potent anticancer compound IMB-HDC was acquired.Although previous studies have revealed that some sophoridine derivatives could induce DNA breakage,the underlying mechanisms of inhibition of DNA damage repair(ATR inactivation)and the apoptosis independent of p53,have not been elucidated.Our research reveals a novel DNA response mechanism different from general DNA-damaging agents,and that sophoridine derivate inhibits the phosphorylation of Tyr694 and Ser780 of STAT5a to induce the lessened shuttle from the cytoplasm to the nucleus,and leads to the decreased nuclear STAT5a and subsequently inhibits the expression of STAT5a target gene RAD51 that contributes to the checkpoint activation,thus inhibiting ATR activation.Meanwhile,IMB-HDC that induced the diminished expression of STAT5a target gene contributes to proliferation and leads to apoptosis.More importantly,we give thefirst evidence that promoting the effect of Tyr694 phosphorylation on nuclear location and subsequent STAT5a target gene transcription depends on Ser780 increased or unchanged phosphorylation and was not correlated with Ser726 phosphorylation. 展开更多
关键词 DNA breakage STAT5a SHUTTLE ANTICANCER nuclear location
Bioinformatics Analysis of the Interaction between Coat Protein and Nuclear Shuttle Protein in <i>Babuvirus</i> 认领
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作者 Naitong Yu Jianhua Wang +3 位作者 Naixin Yu Xiaobao Zheng Qin Zhou Zhixin Liu 《美国植物学期刊(英文)》 2019年第4期622-630,共9页
Protein and protein interactions play important roles in many biological processes and are responsible for carrying out the function of biological regulatory network in living organisms. Previous study indicated that ... Protein and protein interactions play important roles in many biological processes and are responsible for carrying out the function of biological regulatory network in living organisms. Previous study indicated that Banana bunchy top virus (BBTV) coat protein (CP) interacted with BBTV nuclear shuttle protein (NSP). However, the protein and protein interaction and the binding affinity of CP and NSP in Babuvirus are remaining unclear. In this study, the CPs and NSPs proteins of BBTV, Abaca bunchy top virus (ABTV) and Cardamom bushy dwarf virus (CBDV) were used for bioinformatic analysis. The binding free energy and the dissociation constant of the possible interaction proteins were tested in PPA-Pred2, and the results confirmed CP interaction with NSP in Babuvirus. The study will help us to understand the interaction between viral protein and viral protein, and the pathogenesis mechanism of Babuvirus in host plants. 展开更多
关键词 Babuvirus Coatprotein NUCLEAR SHUTTLE PROTEIN Interaction BIOINFORMATICS Analysis
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High energy batteries based on sulfur cathode 认领
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作者 Jian Zhu Jianli Zou +2 位作者 Hua Cheng Yingying Gu Zhouguang Lu 《绿色能源与环境:英文版》 CSCD 2019年第4期345-359,共15页
Lithium-ion batteries(LIBs)have become an indispensable part of our daily life,however,the energy and power capability that LIBs can deliver are lagging far behind the ever-increasing demands of portable electronics a... Lithium-ion batteries(LIBs)have become an indispensable part of our daily life,however,the energy and power capability that LIBs can deliver are lagging far behind the ever-increasing demands of portable electronics and electric vehicles.Metal-sulfur batteries as one of the most promising alternatives to LIBs are receiving rapidly growing research interests due to the extremely high energy density and abundant resources of sulfur.In this short review,we will discuss the state-of-art development of high energy density battery technologies based on sulfur cathode in combination with different metal anodes,with focus on sodium,magnesium and aluminum anodes.We leave lithium-sulfur batteries out of discussion since there are already a large number of nicely organized review papers available.The operation mechanism of various anode materials and the variety of electrolytes used in sulfur batteries will be reviewed.Some perspectives on improving the performances and overcoming the remaining issues in sulfur batteries will be discussed.It is expected that this review will draw more attention to sulfur batteries from both the academic and industrial communities. 展开更多
关键词 Metal-sulfur BATTERY SULFUR CATHODE Electrolytes Energy storage SHUTTLE effect
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A multi-layered Ti3C2/Li2S composite as cathode material for advanced lithium-sulfur batteries 认领
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作者 Xin Liang Jufeng Yun +4 位作者 Kun Xu Hongfa Xiang Yong Wang Yi Sun Yan Yu 《能源化学:英文版》 SCIE EI CAS CSCD 2019年第12期176-181,共6页
Lithium-sulfur(Li-S)batteries with lithium sulfide(Li2S)as cathode have attracted great attention recently,because of high specific capacity(1166 mA h g^-1)of Li2S and potential safety of using Li metal-free anode.Li2... Lithium-sulfur(Li-S)batteries with lithium sulfide(Li2S)as cathode have attracted great attention recently,because of high specific capacity(1166 mA h g^-1)of Li2S and potential safety of using Li metal-free anode.Li2S cathode has lower volume expansion and higher thermal stability than the traditional sulfur cathode.However,the problems of"shuttle effect"and poor electrical conductivity of the cathode material still need to be overcome.In this work,multi-layered Ti3C2/Li2S(ML-Ti3C2/Li2S)composite has been prepared and applied as a cathode in advanced Li-S batteries.The unique multi-layer sheet structure of Ti3 C2 provides space for the storage of Li2S,and its good conductivity greatly enhances the usage ratio of Li2 S and improves the conductivity of the whole Li2S cathode.Compared with commonly used graphene,ML-Ti3C2 can trap polysulfides effectively by chemical adsorption and also activate the reaction of Li2S to polysulfides by forming Ti-S bond.As a result,during the cycling of the batteries with ML-Ti3C2/Li2S cathodes,the activation voltage barrier of the first cycle has decreased to 2.8 V,and the"shuttle effect"has been suppressed effectively.The cycling and rate performances of the ML-Ti3C2/Li2S cathodes have been significantly improved compared to that of graphene/Li2 S cathodes.They maintain a capacity of 450 mAh g^-1 at 0.2 C after 100 cycles,and deliver attractive rate performances of 750,630,540,470 and 360 mAh g^-1 at 0.1 C,0.2 C,0.5 C,1 C,and 2 C,respectively. 展开更多
关键词 Multi-layered Ti3C2 Li2S Lithium-sulfur BATTERIES Activation voltage BARRIER SHUTTLE effect
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Thrust Characteristics Analysis of Long Primary Double Sided Linear Induction Machine with Plate and Novel Shuttle Secondary Structure 认领
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作者 LIU Huijuan ZHANG Qian MA Jiefang 《南京航空航天大学学报:英文版》 EI CSCD 2019年第5期693-702,共10页
The air-gap flux density formula and thrust expression of long primary double sided linear induction machine(DLIM)in the secondary motion reference frame are deduced by using the Maxwell equations firstly.Then,by anal... The air-gap flux density formula and thrust expression of long primary double sided linear induction machine(DLIM)in the secondary motion reference frame are deduced by using the Maxwell equations firstly.Then,by analyzing the factors that affect the thrust ripple in the thrust expression,a shuttle type secondary structure of long primary DLIMs is proposed,and its thrust performances of the machine with different shuttle size combinations are simulated and compared with that of plate secondary long primary DLIM.Comparison results show that the new secondary structure can suppress the thrust ripple and improve the stability of system acceleration. 展开更多
关键词 LINEAR induction machine LONG PRIMARY RIPPLE end effect SHUTTLE secondary
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基于偏心逆作井的新建污水管与既有管接驳技术 认领
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作者 文杰 张彤炜 +5 位作者 周书东 王辉 韩龙伟 刘正刚 许永峰 叶雄明 《施工技术》 CAS 2019年第S01期815-817,共3页
城市截污管网工程中利用偏心逆作井技术对新建污水管与既有管进行接驳,通过偏心逆作井结构代替传统现浇沉井结构的接驳方式,将新建管顶入偏心逆作井,按设计要求施作检查井,将既有管道包入新建检查井,采用静力切割技术对既有管道切除实... 城市截污管网工程中利用偏心逆作井技术对新建污水管与既有管进行接驳,通过偏心逆作井结构代替传统现浇沉井结构的接驳方式,将新建管顶入偏心逆作井,按设计要求施作检查井,将既有管道包入新建检查井,采用静力切割技术对既有管道切除实现接驳。基于偏心逆作井的新建污水管与既有管接驳技术施工效率高,经济和社会效益好,具有较好的推广应用价值。 展开更多
关键词 偏心逆作井 接驳 静力切割 效益
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食品饮料行业的穿梭式立体仓库设计 认领
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作者 沙舟 陆鹏飞 印刚 《饮料工业》 2019年第5期64-67,共4页
电商的快速发展、制造业的转型和土地成本的增加等因素推动了仓储自动化技术装备的升级换代,也迎来了需求暴涨的大好局面。在此背景下,越来越多的食品饮料企业把目光投向仓储物流领域。本文将分析食品饮料行业仓库的现状与需求,密集式... 电商的快速发展、制造业的转型和土地成本的增加等因素推动了仓储自动化技术装备的升级换代,也迎来了需求暴涨的大好局面。在此背景下,越来越多的食品饮料企业把目光投向仓储物流领域。本文将分析食品饮料行业仓库的现状与需求,密集式仓库与堆垛机式仓库的对比分析,穿梭式立体仓库的功能和规划,并从多个方面阐述食品饮料行业仓库项目的立项、选择和规划。 展开更多
关键词 穿梭车 需求和现状 密集式仓库 功能和规划
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