Suppressive effect of Li2CO3 on initial irreversibility at carbon anode in Li-ion batteries

被引：77

作者：

Choi, YK ^{[1
]}

Chung, KI

Kim, WS

Sung, YE

Park, SM

机构：

[1] Chonnam Natl Univ, Dept Chem, Kwangju 500757, South Korea

[2] Chonnam Natl Univ, HECS, RRC, Kwangju 500757, South Korea

[3] K JIST, Dept Mat Sci & Engn, Kwangju 500712, South Korea

[4] Pohang Univ Sci & Technol, Dept Chem, Pohang 790784, South Korea

[5] Pohang Univ Sci & Technol, Ctr Integrated Mol Syst, Pohang 790784, South Korea

来源：

JOURNAL OF POWER SOURCES | 2002年 / 104卷 / 01期

关键词：

lithium-ion battery; initial irreversible capacity; additive; carbon anode;

D O I：

10.1016/S0378-7753(01)00911-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The initial capacity irreversibility caused by film formation on a mesophase pitch-based carbon fibre (MPCF) electrode surface is studied with the goal of improving the performance of a lithium-ion battery. The addition of Li2CO3 to a solution of 1 M LiPF6/EC:DFC (1:1, v/v) results in a decrease in the initial irreversible capacity caused by solvent decomposition and the passivation film on the MPCF electrode surface. Suppression of the initial irreversible capacity at the anode electrode by the introduction of Li2CO3 is investigated by means of chronopotentiometry, cyclic voltammetry, ac impedance spectroscopy, FTIR, scanning electron microscopy (SEM), and energy dispersive X-ray (EDX) analysis. It is concluded that the suppression is caused mainly by prevention of solvent decomposition and by structural change in the passivation film on the anode electrode. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：132 / 139

页数：8

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