期刊
JOURNAL OF POWER SOURCES
卷 161, 期 2, 页码 1264-1274出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2006.05.029
关键词
lithium-ion battery; overcharge protection agents; non-redox shuttle type; aromatic compounds; reaction mechanisms
Aromatic compounds such as biphenyl (BP), cyclohexylbenzene (CHB), and partially hydrogenated m-terphenyl (H-mTP) are used in commercial lithium-ion cells as a non-redox shuttle type overcharge protection agent, where they are electrochemically polymerized to form passivative films on the positive electrode under overcharge conditions. The reaction mechanisms of these aromatic compounds were investigated. The oxidation products of these aromatic compounds on the positive electrode were identified by electrochemical and surface analysis techniques including SEM, TPD-MS and MALDI-TOF-MS. They were the oligomers having 6-12 benzene rings, where the bond formation occurs mainly at ortho-positions of phenyl group. Their formation was not dependent on the monomer structure (BP, CHB, or H-mTP) and temperature (25 or 60 degrees C). It was considered that the cyclohexane structure in CHB or H-mTP was converted to the benzene structure by dehydrogenation after the polymerization. (c) 2006 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据