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
浏览0
下载0
收藏0
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。