英文论文
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文献类型
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Journal article (JA)
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题名
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Exploring high-voltage fluorinated carbonate electrolytes for LiNi0.5Mn1.5O4 cathode in Li-ion batteries
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作者
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Zheng, Xi; Liao, Ying; Zhang, Zhongru; Zhu, Jianping; Ren, Fucheng; He, Huajin; Xiang, Yuxuan; Zheng, Yezhen; Yang, Y.
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作者单位
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[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.
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通讯作者地址
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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.
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Email
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yyang@xmu.edu.cn
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ResearchID
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ORCID
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期刊名称
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Journal of Energy Chemistry
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出版社
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Elsevier B.V.
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ISSN
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2095-4956
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出版信息
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2020-03, 42:62-70.
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JCR
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1
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影响因子
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9.676
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ISBN
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基金
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National Key Research and Development Program of China [2018YFB010440]; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [21761132030, 21621091]
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会议名称
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会议地点
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会议开始日期
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会议结束日期
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关键词
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Additives; Carbonation; Cathodes; Electrolytes; Ethylene; Lithium compounds; Manganese compounds; Nickel compounds; Solvents; Sulfur compounds
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摘要
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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.
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一级学科
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Chemistry, Applied; Chemistry, Physical; Energy & Fuels; Engineering, Chemical
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WOS入藏号
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WOS:000497954500010
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EI收录号
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20192707143379
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DOI
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10.1016/j.jechem.2019.05.023
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ESI
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CHEMISTRY
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收录于
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SCIE, EI
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