文献类型：期刊文献

英文题名：γ-butyrolactone and glutaronitrile as 5 V electrolyte additive and its electrochemical performance for LiNi0.5Mn1.5O4

作者：Xu, Yun[1];Wan, Lingyu[2];Liu, Jiali[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：698

起止页码：207

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20165203179342);WOS:【SCI-EXPANDED(收录号:WOS:000393586300030)】；

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

语种：英文

外文关键词：gamma-butyrolactone; Glutaronitrile; Additive; LiNi0.5Mn1.5O4 cathode

摘要：In this work, gamma-butyrolactone (GBL) and glutaronitrile (GLN) are used as electrolyte additives for LiNi0.5Mn1.5O4 cathode of lithium ion battery. At 1 degrees C rate, the capacity of LiNi0.5Mn1.5O4 is significantly improved by using 2% GBL as additive, its average capacity reaches 113 mA h g(-1). In base electrolyte, the capacity is only 99.5 mA h g(-1). However, utilizing 10% GLN just keeps the capacity around 110 mA h g(-1) in first 50 cycles, and its final capacity is 32.3 mA h g(-1). A series of tests indicate that GBL preferentially oxidized on LiNi0.5Mn1.5O4 forming a stable protective film, which prevents the subsequent oxidation decomposition of the electrolyte from taking place, on the contrary, although GLN has a wider electrochemical window, it can simply enable the cyclic stability at low current rate. When current is increased, the incompatibility of GLN with low voltage Li anode is enlarged. (C) 2016 Elsevier B.V. All rights reserved.