On the cycle behavior of various graphitic negative electrodes in a propylene carbonate-based electrolyte for lithium ion batteries

被引：6

作者：

Egashira, Minato ^{[1
]}

Okada, Shigeto ^{[1
]}

Yamaki, Jun-ichi ^{[1
]}

机构：

[1] Institute of Advanced Material Study, Kyushu University, Kasuga, Fukuoka 816-8580

来源：

Journal of Power Sources | 2003年 / 124卷 / 01期

关键词：

Graphite electrode; Lithium ion battery; Propylene carbonate;

D O I：

10.1016/S0378-7753(03)00601-3

中图分类号：

学科分类号：

摘要：

We investigated the negative electrode behaviors of several mesocarbon microbeads (MCMB) heat-treated over 2000 °C in 1M LiPF 6/propylene carbonate (PC) electrolyte under various charge-discharge current densities. A higher current density provided improved (a highly graphitized MCMB)/Li cell cycle stability as lower graphitized MCMB electrode was used. In addition, two pre-cycles at a higher current density also provided better cycle stability in subsequent cycles at a lower current density. For example, MCMB 6μm in diameter and heat-treated at 2800 °C cycled stably at a current density of 0.2mA cm-2 after 2 pre-cycles at 0.5mA cm-2. A higher current density may provide an adequate surface film at the first charging. © 2003 Elsevier B.V. All rights reserved.

引用

页码：237 / 240

页数：3

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