中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Understanding the Rate Capability of High-Energy-Density Li-Rich Layered Li 1.2 Ni 0.15 Co 0.1 Mn 0.55 O 2 Cathode Materials

文献类型:期刊论文

作者Yu, XQ ; Lyu, YC ; Gu, L ; Wu, HM ; Bak, SM ; Zhou, YN ; Amine, K ; Ehrlich, SN ; Li, H ; Nam, KW ; Yang, XQ
刊名ADVANCED ENERGY MATERIALS
出版日期2014
卷号4期号:5
关键词lithium-ion batteries Li-rich materials layered materials cathodes rate performance kinetics
ISSN号1614-6832
通讯作者Li, H (reprint author), Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China.
中文摘要The high-energy-density, Li-rich layered materials, i.e., xLiMO(2)(1-x)Li2MnO3, are promising candidate cathode materials for electric energy storage in plug-in hybrid electric vehicles (PHEVs) and electric vehicles (EVs). The relatively low rate capability is one of the major problems that need to be resolved for these materials. To gain insight into the key factors that limit the rate capability, in situ X-ray absorption spectroscopy (XAS) and X-ray diffraction (XRD) studies of the cathode material, Li1.2Ni0.15Co0.1Mn0.55O2 [0.5Li(Ni0.375Co0.25 Mn-0.375)O(2)0.5Li(2)MnO(3)], are carried out. The partial capacity contributed by different structural components and transition metal elements is elucidated and correlated with local structure changes. The characteristic reaction kinetics for each element are identified using a novel time-resolved XAS technique. Direct experimental evidence is obtained showing that Mn sites have much poorer reaction kinetics both before and after the initial activation of Li2MnO3, compared to Ni and Co. These results indicate that Li2MnO3 may be the key component that limits the rate capability of Li-rich layered materials and provide guidance for designing Li-rich layered materials with the desired balance of energy density and rate capability for different applications.
资助信息U.S. Department of Energy; Assistant Secretary for Energy Efficiency and Renewable Energy; Office of Vehicle Technologies [DE-AC02-98CH10886, DE-AC02-06CH11357]; CAS Innovation project [KJCX2-YW-W26]; "973" project [2012CB932900]
语种英语
公开日期2015-04-14
源URL[http://ir.iphy.ac.cn/handle/311004/58822]  
专题物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文
推荐引用方式
GB/T 7714
Yu, XQ,Lyu, YC,Gu, L,et al. Understanding the Rate Capability of High-Energy-Density Li-Rich Layered Li 1.2 Ni 0.15 Co 0.1 Mn 0.55 O 2 Cathode Materials[J]. ADVANCED ENERGY MATERIALS,2014,4(5).
APA Yu, XQ.,Lyu, YC.,Gu, L.,Wu, HM.,Bak, SM.,...&Yang, XQ.(2014).Understanding the Rate Capability of High-Energy-Density Li-Rich Layered Li 1.2 Ni 0.15 Co 0.1 Mn 0.55 O 2 Cathode Materials.ADVANCED ENERGY MATERIALS,4(5).
MLA Yu, XQ,et al."Understanding the Rate Capability of High-Energy-Density Li-Rich Layered Li 1.2 Ni 0.15 Co 0.1 Mn 0.55 O 2 Cathode Materials".ADVANCED ENERGY MATERIALS 4.5(2014).

入库方式: OAI收割

来源:物理研究所

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