期刊文献+
共找到64,630篇文章
< 1 2 250 >
每页显示 20 50 100
Development of solid-state electrolytes for sodium-ion battery–A short review 预览
1
作者 Yumei Wang Shufeng Song +3 位作者 Chaohe Xu Ning Hu Janina Molenda Li Lu 《纳米材料科学(英文版)》 CAS 2019年第2期91-100,共10页
All-solid-state sodium-ion battery is regarded as the next generation battery to replace the current commercial lithium-ion battery, with the advantages of abundant sodium resources, low price and high-level safety. A... All-solid-state sodium-ion battery is regarded as the next generation battery to replace the current commercial lithium-ion battery, with the advantages of abundant sodium resources, low price and high-level safety. As one critical component in sodium-ion battery, solid-state electrolyte should possess superior operational safety and design simplicity, yet reasonable high room-temperature ionic conductivity. This paper gives a comprehensive review on the recent progress in solid-state electrolyte materials for sodium-ion battery, including inorganic ceramic/glass-ceramic, organic polymer and ceramic-polymer composite electrolytes, and also provides a comparison of the ionic conductivity in various solid-state electrolyte materials. The development of solid-state electrolytes suggests a bright future direction: all solid-state sodium-ion battery could be fully used to power all electric road vehicles, portable electronic devices and large-scale grid support. 展开更多
关键词 Sodium ion battery IONIC CONDUCTIVITY INORGANIC SOLID ELECTROLYTE SOLID polymer ELECTROLYTE Ceramic-polymer composite ELECTROLYTE
在线阅读 免费下载
Discrete element method study of solid descending and residence properties in COREX shaft furnace with center gas supply device
2
作者 Heng Zhou Qin-fu Hou +2 位作者 Ming-yin Kou Shun Yao Sheng-li Wu 《钢铁研究学报:英文版》 SCIE EI CAS CSCD 2019年第7期669-678,共10页
Solid descending and residence properties in COREX shaft furnace with a center gas supply device (CGSD) were studied using the discrete element method. Solid flow pattern, residence time distribution, and local solid ... Solid descending and residence properties in COREX shaft furnace with a center gas supply device (CGSD) were studied using the discrete element method. Solid flow pattern, residence time distribution, and local solid residence time (SRT) were analyzed. Moreover, the effects of the rotation speed of screws, the radius, and height of CGSD were investigated. The results show that the solid flow is dominantly a plug flow in the shaft furnace with the CGSD. In the upper region of the shaft furnace for gas-solid reduction, uniform distribution of local SRT is observed, which is preferable to match the even gas distribution expected due to the CGSD and slots. For different rotation speeds of the screws, the distribution of solid flow patterns is similar. The averaged residence time, dispersed plug volume fraction, and dead volume fraction decrease with increasing the rotation speed of the screws. The radius of the CGSD affects the solid residence in the shaft furnace. Local SRT above the CGSD increases with the increase in the radius of CGSD, possibly leading to the formation of more agglomerates. Hence, the radius of CGSD should be chosen carefully. The height of CGSD has a minor effect on solid residence in the shaft furnace. 展开更多
关键词 COREX shaft furnace SOLID RESIDENCE time Discrete element method CENTER gas supply DEVICE SOLID DESCENDING
Dendrite-free all-solid-state lithium batteries with lithium phosphorous oxynitride-modified lithium metal anode and composite solid electrolytes
3
作者 Chunhua Wang Guoliang Bai +2 位作者 Yifu Yang Xingjiang Liu Huixia Shao 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第1期217-223,共7页
Dendrite formation on lithium (Li) metal anode is a key issue which hinders the development of rechargeable Li battery seriously. A novel method for suppress!ng Li dendrites via using Li phosphorous oxynitride (UPON) ... Dendrite formation on lithium (Li) metal anode is a key issue which hinders the development of rechargeable Li battery seriously. A novel method for suppress!ng Li dendrites via using Li phosphorous oxynitride (UPON) modified Li anode and Li1.5Al0.5Ge1.5(PO4)3-poly(ethylene oxide)(Li bistrifluoromethane-sulfonimide)(LAGP-PEO(LiTFSI)) composite solid electrolyte in all-solid-state Li battery is proposed, and the effect of the thickness of UPON on Li anode performarice is also studied. LiPON film with a thickness of 500 nm exhibits satisfactory interface property between Li metal anode and the LAGP-PEO(LiTFSI) solid electrolyte. The LiPON film provides a uniform Li^+ flux across the interface and effectively inhibits the formation of Li dendrites in all-solid-state Li batteries. The assembled all-solid-state Li cell Li(LiPON)/LAGP-PEO(LiTFSI)/LiFePO4 delivers an initial discharge capacity of 152.4 mAh·g^-1 and exhibits good cycling stability and rate performanee at 50 ℃. 展开更多
关键词 LITHIUM metal anode LITHIUM DENDRITES Li phosphorous OXYNITRIDE (LiPON) composite solid electrolyte ALL-SOLID-STATE LITHIUM battery
王鉴《陡壑密林图》鉴考
4
作者 田艺珉 《故宫博物院院刊》 CSSCI 北大核心 2019年第5期146-157,194共13页
故宫博物院藏有王鉴康熙壬寅年(1662)仿黄公望《陡壑密林图》轴。王鉴在王时敏处得以目见黄氏原件,其对临或师仿黄氏此轴至少有六次,现存世四件,为立轴三件、册页一开,各各不一。检视康熙元年王鉴《陡壑密林图》轴,与同年所作《仿宋元... 故宫博物院藏有王鉴康熙壬寅年(1662)仿黄公望《陡壑密林图》轴。王鉴在王时敏处得以目见黄氏原件,其对临或师仿黄氏此轴至少有六次,现存世四件,为立轴三件、册页一开,各各不一。检视康熙元年王鉴《陡壑密林图》轴,与同年所作《仿宋元山水》册相比,笔墨不及后者板实圆厚,非典型的王鉴笔墨特征,同时,《陡壑密林图》轴中题跋的墨色、行笔亦不如《仿宋元山水》册。作者基于这一结论,再结合王季迁原藏黄氏之《陡壑密林图》等存世作品,尝试进一步厘辨清初“四王”存世作品的真伪。 展开更多
关键词 王鉴 陡壑密林图 板实圆厚
High strength and ductility of 34CrNiMo6 steel produced by laser solid forming
5
作者 Chunping Huang Xin Lin +2 位作者 Fencheng Liu Haiou Yang Weidong Huang 《材料科学技术学报:英文版》 SCIE EI CAS CSCD 2019年第2期377-387,共11页
Because of the excellent mechanical properties of 34 CrNiMo6 steel, it is widely used in high-value components. Many conventional approaches to strengthening-steels typically involve the loss of useful ductility.In th... Because of the excellent mechanical properties of 34 CrNiMo6 steel, it is widely used in high-value components. Many conventional approaches to strengthening-steels typically involve the loss of useful ductility.In this study, 34 CrNiMo6 Steel having high strength and ductility is produced by laser solid forming(LSF)with a quenching-tempering(QT) treatment. Tempering of bainite is mainly by solid phase transformation in the previous LSF layers during the LSF process. The stable microstructure of LSF consists of ferrite and fine carbides. The microstructure transfers to tempered sorbite after heat-treatment. The tensile properties of the LSF steel meet those of the wrought standard. The UTS and elongation of LSF sample at 858 MPa, 19.2%, respectively, are greater than those of the wrought. The QT treatment enhanced the ultimate tensile strength and yield strength of the LSF sample. The ultimate tensile strength, yield strength, reduction in area, and elongation of the LSF+QT sample at 980 MPa, 916 MPa, 58.9%, and 13.9%,respectively, are greater than those of the wrought standard. The yield strength of the LSF+QT sample is approximately 1.27 times that of the wrought. The LSF samples failed in a ductile fracture mode, while the LSF+QT samples showed mixed-mode failure. The defects have only a small effect on the tensile properties owing to the excellent ductility of the LSF sample. 展开更多
关键词 Laser solid FORMING High strength and DUCTILITY QUENCHING and TEMPERING STEEL Microstructure Mechanical property
ROCO:Using a Solid State Drive Cache to Improve the Performance of a Host-Aware Shingled Magnetic Recording Drive
6
作者 Wen-Guo Liu Ling-Fang Zeng +1 位作者 Dan Feng Kenneth B.Kent 《计算机科学技术学报:英文版》 SCIE EI CSCD 2019年第1期61-76,共16页
Shingled magnetic recording (SMR)can effectively increase the capacity of hard disk drives (HDDs).Hostaware SMR (HA-SMR)is expected to be more popular than other SMR models because of its backward compatibility and ne... Shingled magnetic recording (SMR)can effectively increase the capacity of hard disk drives (HDDs).Hostaware SMR (HA-SMR)is expected to be more popular than other SMR models because of its backward compatibility and new SMR-specific APIs.However,an HA-SMR drive often suffers performance degradation under write-intensive workloads because of frequent non-sequential writes buffered in the disk cache.The non-sequential writes mainly come from update writes,small random writes and out-of-order writes.In this paper,we propose a hybrid storage system called ROCO which aims to use a solid state drive (SSD)cache to improve the performance of an HA-SMR drive.ROCO reorders out-of-order writes belonging to the same zone and uses the SSD cache to absorb update writes and small random writes.We also design a data replacement algorithm called CREA for the SSD cache.CREA first conducts zone-oriented hot/cold data identification to identify cold-cached zones and hot-cached zones,and then evicts data blocks belonging to colder zones with higher priorities that can be sequentially written or written through host-side read-modify-write operations.It gives the lowest priority to data blocks belonging to the hottest-cached zone that have to be non-sequentially written.Experimental results show that ROCO can effectively reduce non-sequential writes to the HA-SMR drive and improve the performance of the HA-SMR drive. 展开更多
关键词 solid state reordering zone-oriented DRIVE (SSD)cache host-aware shingled magnetic recording (HA-SMR)drive zone-oriented block hot/cold DATA identification DATA replacement algorithm
Carbon deposition in porous nickel/yttria-stabilized zirconia anode under methane atmosphere 预览
7
作者 Zhi-yuan Chen Li-jun Wang +3 位作者 Xiao-jia Du Zai-hong Sun Fu-shen Li Kuo-Chih Chou 《矿物冶金与材料学报:英文版》 SCIE EI CAS CSCD 2019年第3期350-359,共10页
A commercial solid oxide fuel cell with a Ni/YSZ anode was characterized under a pure methane atmosphere. The amount of deposited carbon increased with an increase in temperature but decreased when the temperature exc... A commercial solid oxide fuel cell with a Ni/YSZ anode was characterized under a pure methane atmosphere. The amount of deposited carbon increased with an increase in temperature but decreased when the temperature exceeded 700℃. The reactivity of carbon decreased with increasing deposition temperature. Filamentous carbon was deposited from 400 to 600℃, whereas flake carbon was deposited at 700 and 800℃. With increasing temperature, the intensity ratio of the D band over the sum of the G and D bands was constant at the beginning and then decreased with the transformation of the carbon morphology. The crystallite size increased from 2.9 to 13 nm with increasing temperature. The results also indicated that the structure of the deposited carbon was better ordered with increasing deposition temperature. In comparison with pure Ni powders, the interaction between the YSZ substrate and Ni particles could not only modify the carbon deposition kinetics but also reduce the temperature effect on the structure and reactivity variation of carbon. 展开更多
关键词 solid oxide FUEL cell COKING RAMAN spectrum HYDROCARBON FUEL ANODE
在线阅读 下载PDF
Broadband photonic structures for quantum light sources 预览
8
作者 Zhe He Jiawei Yang +4 位作者 Lidan Zhou Yan Chen Tianming Zhao Ying Yu Jin Liu 《半导体学报:英文版》 EI CAS CSCD 2019年第7期55-62,共8页
Quantum light sources serve as one of the key elements in quantum photonic technologies. Such sources made from semiconductor material, e.g., quantum dots (QDs), are particularly appealing because of their great poten... Quantum light sources serve as one of the key elements in quantum photonic technologies. Such sources made from semiconductor material, e.g., quantum dots (QDs), are particularly appealing because of their great potential of scalability enabled by the modern planar nanofabrication technologies. So far, non-classic light sources based on semiconductor QDs are currently outperforming their counterparts using nonlinear optical process, for instance, parametric down conversion and four-wave mixing. To fully exploring the potential of semiconductor QDs, it is highly desirable to integrate QDs with a variety of photonic nanostructures for better device performance due to the improved light-matter interaction. Among different designs, the photonic nanostructures exhibiting broad operation spectral range is particularly interesting to overcome the QD spectral inhomogeneity and exciton fine structure splitting for the generations of single-photon and entangled photon pair respectively. In this review, we focus on recent progress on high-performance semiconductor quantum light sources that is achieved by integrating single QDs with a variety of broadband photonic nanostructures i.e. waveguide, lens and low-Q cavity. 展开更多
关键词 PHOTONIC NANOWIRE PHOTONIC crystal waveguide solid IMMERSION LENS micro-lens circular BRAGG GRATING
在线阅读 下载PDF
运用Excel驱动Solid Edge实现GGD柜内铜排设计 预览
9
作者 张善文 沈波 +1 位作者 刘福海 刘立敬 《智库时代》 2019年第29期279-279,282共2页
本文系统阐述了运用Excel的数据处理能力,驱动Solid Edge软件自动进行三维建模,进而实现GGD柜内铜排智能化设计的方法。在产品三维设计中,利用excel表格存储模型参数来模拟、管理零件是一种快捷实用的方法。本文通过具体实例,利用Solid ... 本文系统阐述了运用Excel的数据处理能力,驱动Solid Edge软件自动进行三维建模,进而实现GGD柜内铜排智能化设计的方法。在产品三维设计中,利用excel表格存储模型参数来模拟、管理零件是一种快捷实用的方法。本文通过具体实例,利用Solid Edge提供的变量表功能,与Excel参数建模有效结合,设计出一套GGD柜内铜排自动设计方法,有效解决GGD柜内铜排制作依靠人工测量,工作效率低的难题。 展开更多
关键词 Excel驱动 智能化 GGD柜内铜排 SOLID Edge变量表
在线阅读 下载PDF
Impact of municipal solid waste incineration on heavy metals in the surrounding soils by multivariate analysis and lead isotope analysis
10
作者 Yang Li Hua Zhang +2 位作者 Liming Shao Xiaoli Zhou Pinjing He 《环境科学学报:英文版》 SCIE EI CAS CSCD 2019年第8期47-56,共10页
Municipal solid waste(MSW) incineration has become an important anthropogenic source of heavy metals(HMs) to the environment. However, assessing the impact of MSW incineration on HMs in the environment, especially soi... Municipal solid waste(MSW) incineration has become an important anthropogenic source of heavy metals(HMs) to the environment. However, assessing the impact of MSW incineration on HMs in the environment, especially soils, can be a challenging task because of various HM sources. To investigate the effect of MSW incineration on HMs in soils, soil samples collected at different distances from four MSW incinerators in Shanghai, China were analyzed for their contents of eight HMs(antimony, cadmium, chromium, copper,lead, mercury, nickel, and zinc) and lead(Pb) isotope ratios. Source identification and apportionment of HMs were accomplished using principal component analysis and Pb isotope analysis. Results indicated that the relatively high contents of cadmium, lead,antimony, and zinc in the soils at 250 m and 750–1250 m away from the MSW incinerators were related to MSW incineration, while the elevated contents of the other four HMs were associated with other anthropogenic activities. Based on Pb isotope analysis, the contribution ratio of MSW incineration(which had been operated for more than 14 years)to the accumulation of Pb in soil was approximately 10% on average, which was lower than coal combustion only. Incinerator emissions of Pb could have a measurable effect on the soil contamination within a limited area(≤1500 m). 展开更多
关键词 MUNICIPAL solid waste INCINERATION SOILS HEAVY metals Source identification Pb ISOTOPE ratios
Orthotopic induction of CH157MN convexity and skull base meningiomas into nude mice using stereotactic surgery and MRI characterization 预览
11
作者 Francesca La Cava Alberto Fringuello Mingo +7 位作者 Pietro Irrera Aldo Di Vito Alessia Cordaro Chiara Brioschi Sonia Colombo Serra Claudia Cabella Enzo Terreno Luigi Miragoli 《动物模型与实验医学(英文)》 CSCD 2019年第1期58-63,共6页
Meningioma in vivo research is hampered by the difficulty of establishing an easy and reproducible orthotopic model able to mimic the characteristics of a human meningioma.Moreover,leptomeningeal dissemination and hig... Meningioma in vivo research is hampered by the difficulty of establishing an easy and reproducible orthotopic model able to mimic the characteristics of a human meningioma.Moreover,leptomeningeal dissemination and high mortality are often associated with such orthotopical models,making them useless for clinical translation studies.An optimized method for inducing meningiomas in nude mice at two different sites is described in this paper and the high reproducibility and low mortality of the models are demonstrated.Skull base meningiomas were induced in the auditory meatus and convexity meningiomas were induced on the brain surface of 23 and 24 nude mice,respectively.Both models led to the development of a mass easily observable by imaging methods.Dynamic contrast enhanced MRI was used as a tool to monitor and characterize the pathology onset and progression.At the end of the study,histology was performed to confirm the neoplastic origin of the diseased mass. 展开更多
关键词 animal models NEUROSCIENCE pharmaceutical development PRECLINICAL imaging solid TUMORS
在线阅读 免费下载
Glucose-derived solid acids and their stability enhancement for upgrading biodiesel via esterification
12
作者 Donglei Mao Xingguang Zhang +2 位作者 Xiongfei Zhang Mingmin Jia Jianfeng Yao 《中国化学工程学报:英文版》 SCIE EI CAS CSCD 2019年第5期1067-1072,共6页
Utilization of biomass-derived materials or chemicals plays a significant role in reducing the dependence of unsustainable resources of petroleum and coal. A series of sulfonated glucose-derived solid acids(SGSAs) wer... Utilization of biomass-derived materials or chemicals plays a significant role in reducing the dependence of unsustainable resources of petroleum and coal. A series of sulfonated glucose-derived solid acids(SGSAs) were developed in this study through a one-step method. These catalysts were characterized by XRD, FT-IR, SEM,and BET to determine their physiochemical properties, and their acid content was measured by acid–base titration. The catalytic performances of SGSA catalysts were evaluated in two esterification reactions: propionic acid or oleic acid with methanol(a typical reaction to upgrade biodiesel). Conversion of oleic acid and selectivity of methyl oleate can reach as high as 93.3% and 94.7% respectively over SGSA-6, which has the highest -SO3 H density. Moreover, regeneration of spent catalysts by sulfuric acid solution can significantly enhance their stability and reusability. 展开更多
关键词 Solid ACIDS GLUCOSE ESTERIFICATION Oleic acid BIODIESEL
Service life prediction of AP/Al/HTPB solid rocket propellant with consideration of softening aging behavior
13
作者 Walid M.ADEL Guozhu LIANG 《中国航空学报:英文版》 SCIE EI CAS CSCD 2019年第2期361-368,共8页
The aging behavior of softening composite solid propellant was investigated by measuring its mechanical and ballistic prosperities during prolonged storage at elevated and room temperatures. Accelerated aging was cond... The aging behavior of softening composite solid propellant was investigated by measuring its mechanical and ballistic prosperities during prolonged storage at elevated and room temperatures. Accelerated aging was conducted at 65 °C for 231 days while the normal aging was performed at 25 ± 3 °C and relative humidity less than 50% for 8 years. The mechanical properties were obtained from uniaxial tensile tests for the aged propellant specimens while the ballistic properties were determined from static firing tests of subscale motors aged for 112 days at 65 °C. The mechanical results show that the maximum tensile strength and Young’s modulus initially increase and subsequently decrease with increasing aging time, while the maximum tensile strain generally increases with increasing aging time. The ballistic properties like burning rate show a small change which cannot affect the ballistic performance. The experimental results show that the changes in the mechanical properties are significant during the aging period, but the burning rate does not undergo significant changes. From this study, it is observed that the propellant ages through a combination of reactions like post-cure, oxidative cross-linking, chain scission, and hydrolysis. The chain scission and the hydrolysis effect are the most significant process, which makes the propellant soft and extendible. The observed aging mechanism has been modeled using an exponential function with two terms which can describe the complex behavior of the aging. By applying Arrhenius equation,the activation energy values were obtained based on the propellant mechanical properties. The shelf life of this propellant formulation at 25 °C is predicted to be 13 years using the modulus as failure criteria and control parameter. 展开更多
关键词 AGING HYDROLYSIS Service LIFE SOFTENING behavior Solid PROPELLANT
Extending SSD Lifespan with Comprehensive Non-Volatile Memory-Based Write Buffers
14
作者 Ziqi Fan Dongchul Park 《计算机科学技术学报:英文版》 SCIE EI CSCD 2019年第1期113-132,共20页
New non-volatile memory (NVM)technologies are expected to replace main memory DRAM (dynamic random access memory)in the near future.NAND flash technological breakthroughs have enabled wide adoption of solid state driv... New non-volatile memory (NVM)technologies are expected to replace main memory DRAM (dynamic random access memory)in the near future.NAND flash technological breakthroughs have enabled wide adoption of solid state drives (SSDs)in storage systems.However,flash-based SSDs,by nature,cannot avoid low endurance problems because each cell only allows a limited number of erasures.This can give rise to critical SSD reliability issues.Since many SSD write operations eventually cause many SSD erase operations,reducing SSD write traffic plays a crucial role in SSD reliability. This paper proposes two NVM-based buffer cache policies which can work together in different layers to maximally reduce SSD write traffic:a main memory buffer cache design named Hierarchical Adaptive Replacement Cache (H-ARC)and an internal SSD write buffer design named Write Traffic Reduction Buffer (WRB).H-ARC considers four factors (dirty,clean, recency,and frequency)to reduce write traffic and improve cache hit ratios in the host.WRB reduces block erasures and write traffic further inside an SSD by effectively exploiting temporal and spatial localities.These two comprehensive schemes significantly reduce total SSD write traffic at each different layer (i.e.,host and SSD)by up to 3x.Consequently,they help extend SSD lifespan without system performance degradation. 展开更多
关键词 BUFFER cache policy WRITE BUFFER non-volatile MEMORY solid state drive flash MEMORY
Solid Works饭金模块下的离心通风机机翼型叶片饭金展开方法分析 预览
15
作者 应云建 杨立军 +1 位作者 王碧超 李定云 《科学与信息化》 2019年第26期110-110,115,共2页
本文主要研究基于SoEd Works的离心通风机机翼型叶片飯金展开,运用Solid Works飯金模块进行设计,研究离心通风机机翼型叶片飯金设计中的有关操作步骤,在设计运用过程中显著提升了叶片展开效率与展开精度,操作方法较为简单,运用价值较大。
关键词 Solid Works飯金模块 离心通风机 机翼型叶片飯金 展开方法
在线阅读 免费下载
Smoothed particle hydrodynamics(SPH) for modeling fluid-structure interactions
16
作者 Moubin Liu Zhilang Zhang 《中国科学:物理学、力学、天文学英文版》 SCIE EI CAS CSCD 2019年第8期1-38,共38页
Fluid-structure interaction(FSI) is a class of mechanics-related problems with mutual dependence between the fluid and structure parts and it is observable nearly everywhere,in natural phenomena to many engineering sy... Fluid-structure interaction(FSI) is a class of mechanics-related problems with mutual dependence between the fluid and structure parts and it is observable nearly everywhere,in natural phenomena to many engineering systems.The primary challenges in developing numerical models with conventional grid-based methods are the inherent nonlinearity and timedependent nature of FSI,together with possible large deformations and moving interfaces.Smoothed particle hydrodynamics(SPH) method is a truly Lagrangian and meshfree particle method that conveniently treats large deformations and naturally captures rapidly moving interfaces and free surfaces.Since its invention,the SPH method has been widely applied to study different problems in engineering and sciences,including FSI problems.This article presents a review of the recent developments in SPH based modeling techniques for solving FSI-related problems.The basic concepts of SPH along with conventional and higher order particle approximation schemes are first introduced.Then,the implementation of FSI in a pure SPH framework and the hybrid approaches of SPH with other grid-based or particle-based methods are discussed.The SPH models of FSI problems with rigid,elastic and flexible structures,with granular materials,and with extremely intensive loadings are demonstrated.Some discussions on several key techniques in SPH including the balance of accuracy,stability and efficiency,the treatment of material interface,the coupling of SPH with other methods,and the particle regularization and adaptive particle resolution are provided as concluding marks. 展开更多
关键词 smoothed PARTICLE hydrodynamics(SPH) fluid-structure interaction(FSI) COMPUTATIONAL fluid dynamics(CFD) COMPUTATIONAL solid dynamics(CSD)
afety-reinforced rechargeable Li-CO2 battery based on a composite olid state electrolyte
17
作者 lui Wang Xuejing Zhang +3 位作者 Yichao Cai Qingshun Nian Zhanliang Tao Jun Chen 《纳米研究:英文版》 SCIE EI CAS CSCD 2019年第10期2543-2548,共6页
The rechargeable Li-CO2 battery has been receiving significant attention owing to its merits of high energy density and the efficient utilization of CO2.However,the widely application is plagued by severe security ris... The rechargeable Li-CO2 battery has been receiving significant attention owing to its merits of high energy density and the efficient utilization of CO2.However,the widely application is plagued by severe security risks,such as leakage,flammability and lithium dendrites growth due to the use of liquid organic electrolytes.Here,a composite solid state electrolyte consisting of polyethylene oxide(PEO)and 20 wt.%Li7La3Zr1.4Tao.6O12(LLZTO)was prepared and first introduced into L1-CO2 battery to solve the problems.The composite solid state electrolyte exhibited high ionic conductivity(1.03 x 10'3 S cm-1 at 70℃),wide electrochemical window(5 V vs.Li+/Li),good mechanical properties and excellent flexibility.Ultimately,the Li symmetric cell with PEO/LLZTO composite solid state electrolyte can operate 1,500 h at a current density of 0.1 mA·cm-2.The assembled all-solid-state Li-CO2 battery behaved a long cycle life of 70 cycles ata current density of 100 mA·g-1 with fixed capacity of 1,000 mAh·g^-1.Our work provides new perspective to develop rechargeable all-solid-state L1-CO2 batteries. 展开更多
关键词 U-CO2 batteries solid state electrolyte COMPOSITE safety
In Vitro Probiotic Effect of Pseudostellaria heterophylla Fibrous Roots on Feed Bacillus subtilis and Preliminary Study on Its Solid Fermentation 预览
18
作者 Pan Huiqing Zhang Yanda +1 位作者 Li Zhujin Zhao Qi 《动物与饲料科学:英文版》 CAS 2019年第2期72-76,共5页
Traditional Chinese medicine Pseudostellaria heterophylla fibrous roots have been widely studied and applied in non-antibiotic clinical breeding of livestock and poultry. In vitro probiotic effect of P. heterophylla f... Traditional Chinese medicine Pseudostellaria heterophylla fibrous roots have been widely studied and applied in non-antibiotic clinical breeding of livestock and poultry. In vitro probiotic effect of P. heterophylla fibrous roots extract on feed probiotics Bacillus subtilis BD-K010 was studied, and the feasibility of solid fermentation of P. heterophylla fibrous roots was preliminarily evaluated. For in vitro probiotic effect, the increased concentration of P. heterophylla fibrous roots extract dependently increased the total biomass of B. subtilis BD-K010;1.0% P. heterophylla fibrous roots extract received the best effect, and the final p H of 1.0% experimental group was closer to neutral. Meantime, B. subtilis BD-K010 with optimum concentration of P. heterophylla fibrous roots showed significantly higher in vitro antibacterial effect than the control group(P<0.01),and the antibacterial effects on Escherichia coli and Staphylococcus aureus were improved by 51.99% and 63.16%, but it was ineffective to Salmonella. For solid fermentation, the profile of substrate complex and appendage flocculent structure on substrate surface at the end of fermenta-tion in experimental groups added with B. subtilis BD-K010 and cellulase plus BD-K010 were more complex;the live bacteria number, polysaccharide content and saponin content at fermentation end-point in two experimental groups were extremely higher than those in the control group(P<0.01).P. heterophylla fibrous roots extract had good in vitro probiotic effect on B. subtilis BD-K010 and promoted its antibacterial effect, and it is feasible to use probiotics for solid fermentation of P. heterophylla fibrous roots and to improve effective components. It is of great significance to further de-velop and utilize P. heterophylla fibrous roots resources in modern animal husbandry. 展开更多
关键词 Pseudostellaria heterophylla FIBROUS roots FEED PROBIOTICS Bacillus SUBTILIS In VITRO probiotic EFFECT Solid fermentation
在线阅读 免费下载
Improved electrochemical performance of Li(Ni0.6Co0.2Mn0.2)O2 at high charging cut-off voltage with Li1.4Al0.4Ti1.6(PO4)3 surface coating
19
作者 王怡 刘柏男 +4 位作者 周格 聂凯会 张杰男 禹习谦 李泓 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第6期446-452,共7页
Ba0.8Sr0.2FeO3-δhas been surface-modified by the lithium-ion conductor Li1.4Al0.4Ti1.6(PO4)3via a facile mechanical fusion method. The annealing temperature during coating process shows a strong impact on the surface... Ba0.8Sr0.2FeO3-δhas been surface-modified by the lithium-ion conductor Li1.4Al0.4Ti1.6(PO4)3via a facile mechanical fusion method. The annealing temperature during coating process shows a strong impact on the surface morphology and chemical composition of Li(Ni0.6 Co0.2 Mn0.2)O2. The 600-?C annealed material exhibits the best cyclic stability at high charging cut-off voltage of 4.5 V(versus Li+/Li) with the capacity retention of 90.9% after 100 cycles, which is much higher than that of bare material(79%). Moreover, the rate capability and thermal stability are also improved by Li1.4Al0.4Ti1.6(PO4)3coating. The enhanced performance can be attributed to the improved stability of interface between Ba0.8Sr0.2FeO3-δand electrolyte by Li1.4Al0.4Ti1.6(PO4)3modification. The results of this work provide a possible method to design reliable cathode materials to achieve high energy density and long cycle life. 展开更多
关键词 LITHIUM-ION batteries cathode Ni-rich oxide solid electrolyte coating
Artificial solid electrolyte interphase based on polyacrylonitrile for homogenous and dendrite-free deposition of lithium metal
20
作者 徐航宇 李泉 +4 位作者 潘弘毅 邱纪亮 曹文卓 禹习谦 李泓 《中国物理B:英文版》 SCIE EI CAS CSCD 2019年第7期523-528,共6页
High chemical reactivity, large volume changes, and uncontrollable lithium dendrite growth have always been the key problems of lithium metal anodes.Coating has been demonstrated as an effective strategy to protect th... High chemical reactivity, large volume changes, and uncontrollable lithium dendrite growth have always been the key problems of lithium metal anodes.Coating has been demonstrated as an effective strategy to protect the lithium metal.In this work, the effects of polyacrylonitrile(PAN)-based coatings on electrodeposited lithium have been studied.Our results show that a PAN coating layer provides uniform and dendrite-free lithium deposition as well as better cycling performance with carbonate electrolyte.Notably, heat treatment of the PAN coating layer promotes the formation of larger deposit particle size and higher coulombic efficiency(85%).The compact coating layer of heat-treated PAN with a large Young modulus(82.7 GPa) may provide stable protection for the active lithium.Improved homogeneity of morphology and mechanical properties of heat-treated PAN contribute to the larger deposit particles.This work provides new feasibility to optimize the polymer coating through rational modification of polymers. 展开更多
关键词 LITHIUM deposition polymer coating artificial solid ELECTROLYTE INTERPHASE POLYACRYLONITRILE
上一页 1 2 250 下一页 到第
使用帮助 返回顶部 意见反馈