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Progress in electrolytes for beyond-lithium-ion batteries 认领
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作者 Juyan Zhang Xuhui Yao +2 位作者 Ravi KMisra Qiong Cai Yunlong Zhao 《材料科学技术:英文版》 SCIE EI CAS CSCD 2020年第9期237-257,共21页
The constant increase in global energy demand and stricter environmental standards are calling for advanced energy storage technologies that can store electricity from intermittent renewable sources such as wind,solar... The constant increase in global energy demand and stricter environmental standards are calling for advanced energy storage technologies that can store electricity from intermittent renewable sources such as wind,solar,and tidal power,to allow the broader implementation of the renewables.The gridoriented sodium-ion batteries,potassium ion batteries and multivalent ion batteries are cheaper and more sustainable alternatives to Li-ion,although they are still in the early stages of development.Additional optimisation of these battery systems is required,to improve the energy and power density,and to solve the safety issues caused by dendrites growth in anodes.Electrolyte,one of the most critical components in these batteries,could significantly influence the electrochemical performances and operations of batteries.In this review,the definitions and influences of three critical components(salts,solvents,and additives)in electrolytes are discussed.The significant advantages,challenges,recent progress and future optimisation directions of various electrolytes for monovalent and multivalent ions batteries(i.e.organic,ionic liquid and aqueous liquid electrolytes,polymer and inorganic solid electrolytes)are summarised to guide the practical application for grid-oriented batteries. 展开更多
关键词 Electrolytes Organic liquid electrolyte Aqueous electrolyte Ionic liquid electrolyte Solid-state electrolyte Sodium-ion batteries Potassium ion batteries Multivalent ion batteries
Metal-organic frameworks and their derivatives for Li-air batteries 认领
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作者 Yu Dong Siwu Li +2 位作者 Shanshan Hong Lu Wang Bo Wang 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第3期635-642,共8页
Metal-organic frameworks(MOFs)are a class of outstanding materials in Li-air batteries because of their high surface areas,tailorable pore sizes and diverse catalytic centers.However,MOF-based batteries are facing cha... Metal-organic frameworks(MOFs)are a class of outstanding materials in Li-air batteries because of their high surface areas,tailorable pore sizes and diverse catalytic centers.However,MOF-based batteries are facing challenges such as poor electronic conductivity and inferior long-cycle stability that limit their further development.This review first summarizes the progress of pristine MOFs and MOF-derived materials in Li-air batteries in the past 5 years,then provides a perspective for subsequent development of MOFs and their derivatives in this emerging field. 展开更多
关键词 METAL-ORGANIC frameworks MOF-derived materials Li-air BATTERIES Li-O2 BATTERIES Li-CO2 BATTERIES
Pseudocapacitance boosted N-doped carbon coated Fe7S8 nanoaggregates as promising anode materials for lithium and sodium storage 认领
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作者 Yanli Zhou Ming Zhang +9 位作者 Qi Wang Jian Yang Xingyun Luo Yanlu Li Rong Du Xinsheng Yan Xueqin Sun Caifu Dong Xiaoyu Zhang Fuyi Jiang 《纳米研究:英文版》 SCIE EI CAS CSCD 2020年第3期691-700,共10页
Herein,the core-shell structured N-doped carbon coated Fe7S8 nano-aggregates(Fe7S8@NC)were controllably prepared via a simple three-step synthesis strategy.The appropriate thickness of N-doped carbon layer outside Fe7... Herein,the core-shell structured N-doped carbon coated Fe7S8 nano-aggregates(Fe7S8@NC)were controllably prepared via a simple three-step synthesis strategy.The appropriate thickness of N-doped carbon layer outside Fe7S8 nano-aggregates can not only inhibit the particle pulverization induced by the big volume changes of Fe7S8,but can increase the electron transfer efficiency.The hierarchical Fe7S8 nano-aggregates composed of some primary nanoparticles can accelerate the lithium or sodium diffusion kinetics.As anode materials for Li-ion batteries(LIBs),the well-designed Fe7S8@NC nanocomposites exhibit outstanding lithium storage performance,which is better than that of pure Fe7S8,Fe3O4@NC and Fe7S8@C.Among these nanocomposites,the N-doped carbon coated Fe7S8 with carbon content of 26.87 wt.%shows a high reversible specific capacity of 833 mAh·g^−1 after 1,000 cycles at a high current density of 2 A·g^−1.The above electrode also shows excellent high rate sodium storage performance.The experimental and theoretical analyses indicate that the outstanding electrochemical performance could be attributed to the synergistic effect of hierarchical Fe7S8 nanostructure and conductive N-doped carbon layer.The quantitative kinetic analysis indicates that the charge storage of Fe7S8@NC electrode is a combination of diffusion-controlled battery behavior and surface-induced capacitance behavior. 展开更多
关键词 FeyS8 N-doped carbon anode materials Li-ion batteries Na-ion batteries
可充电电池中具有空心结构的正极材料 认领
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作者 朱晓波 唐佳勇 +3 位作者 黄亨明 林同恩 罗彬 王连洲 《科学通报:英文版》 SCIE EI CSCD 2020年第6期496-512,M0004共18页
随着可充电电池应用的广泛应用,人们对可充电电池的性能(质量比容量、倍率性能和循环稳定性)提出了更高的要求.设计合成具有微纳米结构的电极材料是提升可充电电池电学性能的一个重要研究方向,其中空心结构设计因其有效性引起研究人员... 随着可充电电池应用的广泛应用,人们对可充电电池的性能(质量比容量、倍率性能和循环稳定性)提出了更高的要求.设计合成具有微纳米结构的电极材料是提升可充电电池电学性能的一个重要研究方向,其中空心结构设计因其有效性引起研究人员的重视.目前空心结构的应用主要集中在负极材料上,相比之下具有空心结构的正极材料因其较难的形貌控制以及较低的体积比容量,研究相对较少.本文总结了具有空心结构的正极材料在可充电电池,主要是在锂离子电池和钠离子电池中的应用,分析讨论了此类正极材料研究中取得的成绩以及存在的问题和挑战.由于空心结构具有更多的反应位点、利于电解液的渗透以及能缓解充放电过程中的体积变化,空心结构化能明显改进下一代高比容量正极材料(比如富锂层型材料、钒基氧化物、硅酸盐等)的电学性能.这些材料往往表现出较低的电子电导率、离子扩散系数和较高的体积变化率.我们相信通过精确控制空心结构的空间结构、开发低成本可放大的合成策略,空心结构能为未来的高性能正极材料提供较为实用化的解决方案. 展开更多
关键词 RECHARGEABLE BATTERIES CATHODE materials HOLLOW structures ELECTROCHEMICAL performance
火力发电厂及光伏电站蓄电池的运行与维护 认领
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作者 张举 《工程建设与设计》 2020年第2期125-126,共2页
对蓄电池的各特征指标以及阀控密封式铅酸蓄电池的日常运行使用方法和检修进行分析,并将这一新技术广泛地应用于发电厂、各电力系统及光伏电站等,保证了电力系统运行的可靠性,同时满足了电力系统规范的要求。
关键词 蓄电池 阀控密封式铅酸蓄电池 运行与维护
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双功能NiCo2S4多面体的构建及其超级电容器和锂离子电池性能 认领
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作者 向国涛 孟瑶 +4 位作者 渠广猛 尹江梅 腾冰 危芹 徐锡金 《科学通报:英文版》 SCIE EI CSCD 2020年第6期443-451,M0003共10页
双功能NiCo2S4多面体结构具有优异的电化学性能,适用于超级电容器和锂离子电池.本文采用水热方法合理设计并成功合成了具有高表面积、稳定结构、良好结晶性的NiCo2S4多面体结构.其特定的多面体结构具有离子反应的活性位点和足够的离子... 双功能NiCo2S4多面体结构具有优异的电化学性能,适用于超级电容器和锂离子电池.本文采用水热方法合理设计并成功合成了具有高表面积、稳定结构、良好结晶性的NiCo2S4多面体结构.其特定的多面体结构具有离子反应的活性位点和足够的离子传输空间,因此可实现包括高比电容、良好的速率能力和循环稳定性在内的优异电化学性能.作为超级电容器的NiCo2S4电极在1 A/g时具有1298 F/g的比电容,在20 A/g时具有80.4%电容保持率. 8000次循环后电容仍保持90.44%.此外,NiCo2S4作为锂离子电池的阳极,在0.5 C时具有807.6和972.8 m Ah/g的初始充电/放电能力.该工作为下一代储能应用中组装具有出色电化学性能的电极和器件提供了一条可行的途径. 展开更多
关键词 NiCo2S4 POLYHEDRON SUPERCAPACITOR LITHIUM-ION BATTERIES
具有介孔壳层的空心Fe3O4/碳MOFs衍生材料用于储锂 认领
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作者 伊秋颖 杜梦梦 +4 位作者 沈斌 嵇家辉 董陈成 邢明阳 张金龙 《科学通报:英文版》 SCIE EI CSCD 2020年第3期233-242,共10页
空心MOFs及其衍生物因其高比表面积和完美的框架结构而受到越来越多的关注,这些特性决定了MOFs材料在储能和催化领域具有极大的应用潜力.然而,目前很少有研究针对空心MOFs的壳层进行修饰,如对壳层表面进行介孔修饰,这将赋予MOFs衍生材... 空心MOFs及其衍生物因其高比表面积和完美的框架结构而受到越来越多的关注,这些特性决定了MOFs材料在储能和催化领域具有极大的应用潜力.然而,目前很少有研究针对空心MOFs的壳层进行修饰,如对壳层表面进行介孔修饰,这将赋予MOFs衍生材料一些新的性能.本文以50 nm尺寸的二氧化硅纳米球为模板,通过配位聚合诱导自组装工艺成功地合成了具有介孔壳层的空心MOFs(MIL-53(Fe)).紧密修饰的介孔结构使空心MOFs的壳层非常薄,从而实现了从MOFs到空心Fe3O4/碳材料的转化.将空心Fe3O4/碳材料作为阳极活性材料用于锂离子电池,该材料表现出优异的电化学性能.即使在0.1 A/g电流密度条件下循环200次,电容量仍可保持在1270 mA h/g.本研究为能源领域多功能化MOFs及其衍生物的设计和制备提供了新的思路. 展开更多
关键词 HOLLOW MOFS HOLLOW Fe3O4/carbon MESOPORE modification LITHIUM ion batteries
Nitrogen doped porous carbon as excellent dual anodes for Li-and Na-ion batteries 认领
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作者 Zhanheng Yan Qin-Wen Yang +1 位作者 Qinghong Wang Jianmin Ma 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第2期583-588,共6页
Biomass-derived carbon materials have obtained great attention due to their sustainability,easy availability,low cost and environmentally benign.In this work,bamboo leaves derived nitrogen doped hierarchically porous ... Biomass-derived carbon materials have obtained great attention due to their sustainability,easy availability,low cost and environmentally benign.In this work,bamboo leaves derived nitrogen doped hierarchically porous carbon have been efficiently synthesized via an annealing approach,followed by an etching process in HF solution.Electrochemical measurements demonstrate that the unique porous structure,together with the inherent high nitrogen content,endow the as-derived carbon with excellent lithium/sodium storage performance.The porous carbon annealed at 700℃presents outstanding rate capability and remarkable long-term stability as anodes for both lithium-ion batteries and sodium-ion batteries.The optimized carbon delivers a high discharge capacity of 450 mAh/g after 500 cycles at the current density of 0.2 A/g for LIBs,and a discharge capacity of 180 mAh/g after 300 cycles at the current density of 0.1 A/g for SIBs. 展开更多
关键词 Nitrogen DOPING Carbon ANODE LITHIUM-ION BATTERIES Sodium-ion BATTERIES
Three-Dimensional Self-assembled Hairball-Like VS4 as High-Capacity Anodes for Sodium-Ion Batteries 认领
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作者 Shuangshuang Ding Bingxin Zhou +5 位作者 Changmiao Chen Zhao Huang Pengchao Li Shuangyin Wang Guozhong Cao Ming Zhang 《纳微快报:英文版》 SCIE EI CAS CSCD 2020年第3期142-154,共13页
Sodium-ion batteries(SIBs) are considered to be attractive candidates for large-scale energy storage systems because of their rich earth abundance and consistent performance.However,there are still challenges in devel... Sodium-ion batteries(SIBs) are considered to be attractive candidates for large-scale energy storage systems because of their rich earth abundance and consistent performance.However,there are still challenges in developing desirable anode materials that can accommodate rapid and stable insertion/extraction of Na+and can exhibit excellent electrochemical performance.Herein,the self-assembled hairball-like VS4 as anodes of SIBs exhibits high discharge capacity(660 and 589 mAh g-1 at 1 and 3 A g-1,respectively) and excellent rate property(about 100% retention at 10 and 20 A g-1 after 1000 cycles) at room temperature.Moreover,the VS4 can also exhibit 591 mAh g-1 at 1 A g-1 after 600 cycles at 0℃.An unlike traditional mechanism of VS4 for Na+storage was proposed according to the dates of ex situ characterization,cyclic voltammetry,and electrochemical kinetic analysis.The capacities of the final stabilization stage are provided by the reactions of reversible transformation between Na2 S and S,which were considered the reaction mechanisms of Na-S batteries.This work can provide a basis for the synthesis and application of sulfur-rich compounds in fields of batteries,semiconductor devices,and catalysts. 展开更多
关键词 VS4 Sodium-ion BATTERIES LOW-TEMPERATURE BATTERIES Reaction kinetics Na+storage mechanism
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Unlock the potential of Li4Ti5O(12) for high-voltage/long-cycling-life and high-safety batteries: Dual-ion architecture superior to lithium-ion storage 认领
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作者 Xiaoyuan Shi Shansheng Yu +2 位作者 Ting Deng Wei Zhang Weitao Zheng 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第5期13-18,共6页
Li4Ti5O(12)(LTO)has drawn great attention due to its safety and stability in lithium-ion batteries(LIBs).However,high potential plateau at 1.5 V vs.Li reduces the cell voltage,leading to a limited use of LTO.Dual-ion ... Li4Ti5O(12)(LTO)has drawn great attention due to its safety and stability in lithium-ion batteries(LIBs).However,high potential plateau at 1.5 V vs.Li reduces the cell voltage,leading to a limited use of LTO.Dual-ion batteries(DIBs)can achieve high working voltage due to high intercalation potential of cathode.Herein,we propose a DIB configuration in which LTO is used as anode and the working voltage was 3.5 V.This DIB achieves a maximum specific energy of 140 Wh/kg at a specific power of 35 W/kg,and the specific power of 2933 W/kg can be obtained with a remaining specific energy of 11 Wh/kg.Traditional LIB material shows greatly improved properties in the DIB configuration.Thus,reversing its disadvantage leads to upgraded performance of batteries.Our configuration has also widened the horizon of materials for DIBs. 展开更多
关键词 Li4Ti5O12 SPECIFIC energy SPECIFIC power Dual-ion BATTERIES LITHIUM-ION BATTERIES
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Three dimensional porous frameworks for lithium dendrite suppression 认领
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作者 Shuyan Ni Shuangshuang Tan +1 位作者 Qinyou An Liqiang Mai 《能源化学:英文版》 SCIE EI CAS CSCD 2020年第5期73-89,共17页
Lithium metal is a promising anode material owing to its very low electrochemical potential and ultrahigh specific capacity.However,the growth of lithium dendrites could result in a short lifespan,low coulombic effici... Lithium metal is a promising anode material owing to its very low electrochemical potential and ultrahigh specific capacity.However,the growth of lithium dendrites could result in a short lifespan,low coulombic efficiency,and potential safety hazards during the progress of lithium plating/stripping.These factors drastically hinder its application in lithium metal batteries.This review focuses on the use of three dimensional(3D)porous host frameworks to improve Li plating/stripping behaviors,accommodate the change in volume,and suppress or block lithium dendrite growth.Various 3D porous frameworks,including the conductive carbon-based,metal-based,and lithiophilic inorganic-compound frameworks are introduced and summarized in detail.The particular functions,relative developments,and optimized strategies of various 3D porous frameworks for lithium deposition/dissolution behaviors are discussed.Moreover,the challenges and promising developments in the field of Li metal anodes will be discussed at the end of this review. 展开更多
关键词 LITHIUM metal battery 3D porous frameworks LITHIUM DENDRITE LITHIUM SULFUR BATTERIES LITHIUM oxygen BATTERIES Li plating/stripping
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文章速递Progress on multiphase layered transition metal oxide cathodes of sodium ion batteries 认领
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作者 Qi Wang Shiyong Chu Shaohua Guo 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2167-2176,共10页
As one of the most promising secondary batteries in large-scale energy storage,sodium ion batteries(SIBs) have attracted wide attention due to the abundant raw materials and low cost.Layered transition metal oxides ar... As one of the most promising secondary batteries in large-scale energy storage,sodium ion batteries(SIBs) have attracted wide attention due to the abundant raw materials and low cost.Layered transition metal oxides are one kind of popular cathode material candidates because of its easy synthesis and large theoretical specific capacity.Yet,the most common P2 and O3 phases show distinct structural characteristics respectively.O3 phase can serve as a sodium reservoir,but it usually suffers from serious phase transition and sluggish kinetics.For the P2 phase,it allows the fast sodium ion migration in the bulk and the structure can maintain stable,but it is lack of sodium,showing a great negative effect on Coulombic efficiency in full cell.Thus,single phase structure almost cannot achieve satisfied comprehensive sodium storage performances.Under these circumstances,exploiting novel multiphase cathodes showing synergetic effect may give solution to these problems.In this review,we summarize the recent development of multiphase layered transition metal oxide cathodes of SIBs,analyze the mechanism and prospect the future potential research directions. 展开更多
关键词 Sodium ion batteries Cathodes Layered transition metal oxides Biphase materials Triphase materials
文章速递In-situ growth of hybrid NaTi8O13/NaTiO2 nanoribbons on layered MXene Ti3C2 as a competitive anode for high-performance sodium-ion batteries 认领
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作者 Xuan Sun Ke Tan +3 位作者 Yang Liu Jinyang Zhang Linrui Hou Changzhou Yuan 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2254-2258,共5页
In the work,we successfully explore a two-step hydrothermal method for scalable synthesis of the hybrid sodium titanate(NaTi8O13/NaTiO2) nanoribbons well in-situ formed on the multi-layered MXene Ti3C2(designed as NTO... In the work,we successfully explore a two-step hydrothermal method for scalable synthesis of the hybrid sodium titanate(NaTi8O13/NaTiO2) nanoribbons well in-situ formed on the multi-layered MXene Ti3C2(designed as NTO/Ti3C2).Benefiting from the inherent structural and componential superiorities,the resulted NTO/Ti3C2 composite exhibits long-duration cycling stability and superior rate behaviors when evaluated as a hybrid anode for advanced SIBs,which delivers a reversible and stable capacity of~82 mAh/g even after 1900 cycles at 2000 mA/g for SIBs. 展开更多
关键词 Sodium titanate nanoribbons Layered MXene Ti3C2 In-situ growth Anodes Sodium ion batteries
文章速递High-performance Na1.25V3O8 nanosheets for aqueous zinc-ion battery by electrochemical induced de-sodium at high voltage 认领
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作者 Di Xie Fang Hu +3 位作者 Xin Yu Fuhan Cui Guihong Song Kai Zhu 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2268-2274,共7页
Aqueous rechargeable zinc-ion batteries(ARZIBs) are expected to replace organic electrolyte batteries owing to its low price,safe and environmentally friendly characteristics.Herein,we fabricated vanadium-based Na1.25... Aqueous rechargeable zinc-ion batteries(ARZIBs) are expected to replace organic electrolyte batteries owing to its low price,safe and environmentally friendly characteristics.Herein,we fabricated vanadium-based Na1.25V3O8 nanosheets as a cathode material for ARZIBs,which present a high performance by electrochemical de-sodium at high voltage to form Na2V6O16 phase in the first cycle:high capacity of 390 mAh/g at 0.1 A/g,high rate perfo rmance(162 mAh/g at 10 A/g) and superior cycle stability(179 mAh/g with a high capacity retention of 88.2% of the maximum capacity after 2000 cycles).In addition,the cell exhibits a high energy density of 416.9 Wh/kg at 143.6 W/kg,suggesting great potential of the as-prepared Na1.25V3O8 nanosheets for ARZIBs. 展开更多
关键词 Na1.25V3O8 nanosheets Aqueous rechargeable zinc-ion batteries Electrochemical de-sodium Cycle stability High energy density
文章速递Sodium-based dual-ion batteries via coupling high-capacity selenium/graphene anode with high-voltage graphite cathode 认领
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作者 Xiankun Hou Wenhao Li +5 位作者 Yingying Wang Shaofang Li Yunfeng Meng Haiyue Yu Baokuan Chen Xinglong Wu 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2314-2318,共5页
Dual ion batteries(DIBs) exhibit broad application prospects in the field of electrical energy storage(EES)devices with excellent properties,such as high voltage,high energy density,and low cost.In the graphitebased D... Dual ion batteries(DIBs) exhibit broad application prospects in the field of electrical energy storage(EES)devices with excellent properties,such as high voltage,high energy density,and low cost.In the graphitebased DIBs,high voltage is needed to store enough anions with the formation of anion intercalation compound XCn(X=AlCl4-,PF6-,TFSI-,etc.).Hence,it is difficult for graphite-based DIBs to match proper anodes and electrolytes.Here,an Se/graphene composite is prepared via a convenient method,and assembled into a dual-ion full battery(DIFB) as anode with graphite cathode and 1 mol/L NaPF6 in EC:EMC(1:1,v:v).This DIFB has achieved a high discharge capacity of 75.9 mAh/g and high medium output voltage of 3.5 V at 0.1 A/g.Actually,the suitable anode materials,such as the present Se/graphene composite,are extremely important for the development and application of graphite-based DIBs.This study is enlightening for the design of future low-cost EES devices including graphite-based DIBs. 展开更多
关键词 Dual ion batteries High-capacity anode Se/grapheme High-voltage cathode Graphite
文章速递Two-dimensional 1T-PS2 as a promising anode material for sodium-ion batteries with ultra-high capacity, low average voltage and appropriate mobility 认领
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作者 Dawei Zhou Chunping Li +3 位作者 Furong Yin Xin Tang Chunying Pu Chaozheng He 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2325-2329,共5页
As electrodes,two-dimensio nal materials show special advantages including the infinite planar lengths,broad electrochemical window,large surface-volume ratio,and much exposed active sites.In theory,the two-dimensiona... As electrodes,two-dimensio nal materials show special advantages including the infinite planar lengths,broad electrochemical window,large surface-volume ratio,and much exposed active sites.In theory,the two-dimensional materials consist of the elements with high electronegativity may absorb more Na atoms,resulting in a high battery storage capacity.Based on the above idea,we selected the two dimensional metallic PS2 with 1 T-Type structure as an anode material,and explored its potential applications as an electrode material for Na-ion battery through first-principle calculations.As we expected,when two dimensional PS2 is used as an anode in Na-ion battery,it can adsorb maximum three layers of sodium atoms on both sides of the monolayer,resulting in a maximum theoretical capacity of 1692 mAh/g.Furthermore,it also possesses a rather small sodium diffusion barrier of 0.17 eV,a low average open-circuit voltage of 0.18 V,and a relatively small lattice changes within 13% during the intercalation of Na.These results suggested that the two dimensional PS2 is a potentially excellent Na-ion battery anode.Our idea of designing two-dimensional anode materials with high storage capacity may provide some references for designing the next generation anode materials of metal-ion batteries. 展开更多
关键词 Two-dimensional PS2 Anode material Sodium-ion batteries First-principles calculations Electronic structure
文章速递Multilayered structure of N-carbonenvelopediron oxide/graphene nanocomposites as an improved anode for Li-ion battery 认领
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作者 Li Sun Kai Wang +3 位作者 Ningning Li Jun Zhang Xiangxin Guo Xianghong Liu 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2333-2338,共6页
Transition metal oxides with high capacity are considered a promising electrode material for lithium-ion batteries(LIBs).Nevertheless,the huge volume expansion and poor conductivity severely hamper their practical app... Transition metal oxides with high capacity are considered a promising electrode material for lithium-ion batteries(LIBs).Nevertheless,the huge volume expansion and poor conductivity severely hamper their practical application.In this work,a carbon riveting method is reported to address the above issues by designing multilayered N-doped carbon(N-carbon) enveloped Fe3O4/graphene nanosheets.When evaluated as a negative electrode,the N-carbon/Fe3O4/graphene nanocomposites demonstrate greatly enhanced electrochemical properties compared with Fe3O4/graphene.The N-carbon/Fe3O4/graphene presents a superior reversible capacity(807 mAh/g) over Fe3O4/graphene(540 mAh/g).Furthermore,it affords a considerable capacity of 550 mAh/g at 1 A/g over 700 cycles,indicating supe rb cycling stability.The structure-property correlation studies reveal that the carbon riveting layer is essential for enhancing the lithium diffusion kinetics.The good electrochemical properties and effective structure design make the carbon riveting strategy quite general and reliable to manipulate high performance electrodes for future LIBs. 展开更多
关键词 Fe3O4 Nanosheet N-doped carbon Anode Lithium-ion batteries
文章速递Integrated lithium metal anode protected by composite solid electrolyte film enables stable quasi-solid-state lithium metal batteries 认领
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作者 Junfan Ding Rui Xu +4 位作者 Chong Yan Ye Xiao Yeru Liang Hong Yuan Jiaqi Huang 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2339-2342,共4页
Lithium(Li) metal,possessing an extremely high theoretical specific capacity(3860 mAh/g) and the most negative electrode potential(-3.040 V vs.standard hydrogen electrode),is one the most favorable anode materials for... Lithium(Li) metal,possessing an extremely high theoretical specific capacity(3860 mAh/g) and the most negative electrode potential(-3.040 V vs.standard hydrogen electrode),is one the most favorable anode materials for future high-energy-density batteries.However,the poor cyclability and safety issues induced by extremely unstable interfaces of traditional liquid Li metal batteries have limited their practical applications.Herein,a quasi-solid battery is constructed to offer superior interfacial stability as well as excellent interfacial contact by the incorporation of Li@composite solid electrolyte integrated electrode and a limited amount of liquid electrolyte(7.5 μL/cm2).By combining the inorganic garnet Aldoped Li6.75La3Zr1.75Ta0.25O12(LLZO) with high mechanical strength and ionic conductivity and the o rganic ethylene-vinyl acetate copolymer(EVA) with good flexibility,the composite solid electrolyte film could provide sufficient ion channels,sustained interfacial contact and good mechanical stability at the anode side,which significantly alleviates the thermodynamic corrosion and safety problems induced by liquid electrolytes.This innovative and facile quasi-solid strategy is aimed to promote the intrinsic safety and stability of working Li metal anode,shedding light on the development of next-generation highperformance Li metal batteries. 展开更多
关键词 Lithium metal anodes Composite electrolyte Quasi-solid-state batteries Lithium dendrites Lean electrolyte
文章速递S-O bond chemically constrained NiS2/rGO nanocomposite with enhanced Na-ion storage capacity 认领
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作者 Shuyu Zhou Xiaozhe Jin +4 位作者 Shengming Zhu Qian Luo Zhiwen Qiu Aimin Wu Hao Huang 《中国化学快报:英文版》 SCIE CAS CSCD 2020年第9期2353-2357,共5页
NiS2 has become a research hotspot of anode materials for Na-ion batteries due to its high theoretical specific capacity.However,the volume effect,the dissolution of polysulfide intermediates and the low conductivity ... NiS2 has become a research hotspot of anode materials for Na-ion batteries due to its high theoretical specific capacity.However,the volume effect,the dissolution of polysulfide intermediates and the low conductivity during the charge/discharge process lead to the low specific capacity and poor cycling stability.NiS2/rGO nanocomposite was prepared by a facile two-step process:GO was prepared by modified Hummers method,and then NiS2/rGO nanocomposite was synthesized by L-cys assisted hydrothermal method.NiS2/rGO nanocomposite shows excellent cycle performance and rate performance,which could be attributed to the mesoporous structure on the graphene skeleton with high conductivity.Besides,the chemical constraint of a unique S—O bond on NiS2 could inhibit the dissolution of intermediates and the loss of irreversible capacity. 展开更多
关键词 Na-ion batteries NiS2/rGO nanocomposite Hydrothermal reaction Anode Chemical constraint
Facile construction of honeycomb-shaped porous carbon electrode materials using recyclable sodium chloride template for efficient lithium storage 认领
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作者 FANG ShiQing HE HaoXuan +6 位作者 YU YingHui LI Xiao XIE WeiCheng LI Wei JIN LuQiao YANG ZhenYu CAI JianXin 《中国科学:技术科学英文版》 SCIE EI CAS CSCD 2020年第10期2123-2130,共8页
Carbon materials are the preferred anode materials for Li-ion batteries.Here,we propose an easy and sustainable strategy to prepare honeycomb-shaped porous carbon(HPC)electrode materials through a process involving si... Carbon materials are the preferred anode materials for Li-ion batteries.Here,we propose an easy and sustainable strategy to prepare honeycomb-shaped porous carbon(HPC)electrode materials through a process involving simple calcination and subsequent water washing by using polyvinyl-pyrrolidone(PVP)as carbon source and NaCl as pore-forming agent.A controllable cavity size and distribution of the carbon materials can be readily obtained solely by adjusting the NaCl amount.Results showed that the optimized HPC sample had a relatively uniform cavity distribution and a highly porous structure.Moreover,the special honeycomb-shaped structure was conducive to the electronic conductivity of the electrode materials,provided a short path for Li-ion transport and a wide interface with the electrolyte,and buffered the volume change of active materials.The special honeycomb-shaped structure was also maintained well after long cycles,which improved electrode stability.When used as anode materials for Li-ion batteries(LIBs),the sample demonstrated excellent cycling stability and rate performance,with a high specific capacity of 230 mA hg^-1 and a reversible capacity of 197 mA hg^-1,after 1200 cycles at 2 C.Overall,we introduced a simple strategy for the potential mass production of porous carbon materials for LIBs. 展开更多
关键词 lithium-ion batteries polyvinyl-pyrrolidone sodium chloride honeycomb-shaped porous carbon materials
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