文献类型：期刊文献

英文题名：FEC as the additive of 5 V electrolyte and its electrochemical performance for LiNi0.5Mn1.5O4

作者：Xu, Yun[1];Liu, Jiali[2];Zhou, Lan[2];Zeng, Lecai[2];Yang, Zuoguo[1]

机构：[1]East China Univ Sci & Technol, Inst Chem Engn, Shanghai 200030, Peoples R China;[2]Shanghai Elect Grp Co Ltd, Cent Acad, Shanghai 200433, Peoples R China

年份：2017

卷号：791

起止页码：109

外文期刊名：JOURNAL OF ELECTROANALYTICAL CHEMISTRY

收录：;EI(收录号：20171203459550);WOS:【SCI-EXPANDED(收录号:WOS:000399513800014)】；

基金：The authors acknowledge supports from the Central Academe, Shanghai Electric Group. Co., Ltd., East China University of Science and Technology as well as the Shanghai Pujiang Program.

语种：英文

外文关键词：Fluoroethylene carbonate; Additive; LiNi0.5Mn1.5O4 cathode

摘要：The effects of 1 vol% and 2 vol% Fluoroethylene carbonate (FEC) on the electrochemical performance of LiNi0.5Mn1.5O4 (LNMO) have been investigated, and the results show that the cycling performance and rate capability of LiNi0.5Mn1.5O4 have been improved. In base electrolyte, the capacities become 91.3 mA h g(-1) with a retention of 82.3% after 150 cycles at 1 C rate. In contrast, after 150 cycles the 1% FEC system reaches 106.7 mA h g(-1) with a 91.1% capacity retention, and the 2% FEC system achieves 113.5 mA h g(-1) with a 96.2% retention. 2% FEC system can even maintain 105.7 mA h g(-1) at 2 C rate. Series of measurements exhibit that the preferential decomposition of FEC is beneficial to form a conductive film, which contains less compositions with low ionic conductivity. What's more, 2% FEC is more useful in forming a uniform and dense film than 1% FEC. (c) 2017 Published by Elsevier B.V.