英文论文


文献类型
Journal article (JA)
题名
Exploring high-voltage fluorinated carbonate electrolytes for LiNi0.5Mn1.5O4 cathode in Li-ion batteries
作者
Zheng, Xi; Liao, Ying; Zhang, Zhongru; Zhu, Jianping; Ren, Fucheng; He, Huajin; Xiang, Yuxuan; Zheng, Yezhen; Yang, Y.
作者单位
[Zheng, Xi; Liao, Ying; Zhang, Zhongru; Zhu, Jianping; He, Huajin; Xiang, Yuxuan; Zheng, Yezhen; Yang, Y.] Xiamen Univ, Coll Chem & Chem Engn, Collaborat Innovat Ctr Chem Energy Mat iChEM, State Key Lab Phys Chem Solid Surfaces, Xiamen 361005, Fujian, Peoples R China. [Zheng, Xi; Liao, Ying; Zhang, Zhongru; Zhu, Jianping; He, Huajin; Xiang, Yuxuan; Zheng, Yezhen; Yang, Y.] Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Fujian, Peoples R China. [Ren, Fucheng; Yang, Y.] Xiamen Univ, Coll Energy, Xiamen 361102, Fujian, Peoples R China.
通讯作者地址
Xiamen Univ, Coll Chem & Chem Engn, Dept Chem, Xiamen 361005, Fujian, Peoples R China.; Yang, Y (reprint author), Xiamen Univ, Coll Energy, Xiamen 361102, Fujian, Peoples R China.
Email
yyang@xmu.edu.cn
ResearchID
ORCID
期刊名称
Journal of Energy Chemistry
出版社
Elsevier B.V.
ISSN
2095-4956
出版信息
2020-03, 42:62-70.
JCR
1
影响因子
9.676
ISBN
基金
National Key Research and Development Program of China [2018YFB010440]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21761132030, 21621091]
会议名称
会议地点
会议开始日期
会议结束日期
关键词
Additives; Carbonation; Cathodes; Electrolytes; Ethylene; Lithium compounds; Manganese compounds; Nickel compounds; Solvents; Sulfur compounds
摘要
Ethyl-(2,2,2-trifluoroethyl) carbonate (ETFEC) is investigated as a solvent component in high-voltage electrolytes for LiNi0.5Mn1.5O4 (LNMO). Our results show that the self-discharge behavior and the high temperature cycle performance can be significantly improved by the addition of 10% ETFEC into the normal carbonate electrolytes, e.g., the capacity retention improved from 65.3% to 77.1% after 200 cycles at 60 degrees C. The main reason can be ascribed to the high stability of ETFEC which prevents large oxidation of the electrolyte on the cathode surface. In addition, we also explore the feasibility of electrolytes using single fluoriated-solvents with and without additives. Our results show that the cycle performance of LNMO material can be greatly improved in 1 M LiPF6 + pure ETFEC-solvent system with 2 wt% ethylene carbonate (EC) or ethylene sulfate (DTD). The capacity retention of the LNMO materials is 93% after 300 cycles, even better than that of carbonate-based electrolytes. It is shown that the additives are oxidized on the surface of LNMO particles and contribute to the formation of cathode/electrolyte interphase (CEI) films. This composite CEI film plays a crucial role in suppressing the serious decomposition of the electrolyte at high voltage. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.
一级学科
Chemistry, Applied; Chemistry, Physical; Energy & Fuels; Engineering, Chemical
WOS入藏号
WOS:000497954500010
EI收录号
20192707143379
DOI
10.1016/j.jechem.2019.05.023
ESI
CHEMISTRY
收录于
SCIE, EI

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