Synthesis and electrochemical properties of Li0.44MnO2 as a novel 4 V cathode material

被引：20

作者：

Akimoto, J

Awaka, J

Takahashi, Y

Kijima, N

Tabuchi, M

Nakashima, A

Sakaebe, H

Tatsumi, K

机构：

[1] Natl Inst Adv Ind Sci & Technol, AIST, Tsukuba, Ibaraki 3058565, Japan

[2] Natl Inst Adv Ind Sci & Technol, Ikeda, Osaka 5638577, Japan

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2005年 / 8卷 / 10期

关键词：

D O I：

10.1149/1.2035750

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Li(0.44)Mn(1- y)Ti(y)O(2) (0 < y < 0.55) with Na(0.44)MnO(2)-type tunnel structure were prepared from the Na-analogs via ion exchange in molten LiNO(3)/LiCl at 280-330 degrees C. Chemical analysis indicated the Na/Li ratios in Li(0.44)Mn(1- y)Ti(y)O(2) were less than 0.004. The electrochemical measurements for the Li/Li(0.44)MnO(2) cell showed a novel high potential plateau region at around 4.3 V on both charge and discharge with an average discharge voltage of 3.57 V, and an initial discharge capacity of 166 mAh/g between 2.5 and 4.8 V. The 4 V plateau was observed in all Li/Li(0.44)Mn(1- y)TiyO(2) cells with different Ti contents. The maximum discharge capacity (179 mAh/g) was observed in the Li/Li(0.44)Mn(0.89)Ti(0.11)O(2) cell. (c) 2005 The Electrochemical Society.

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页码：A554 / A557

页数：4

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