Abstract
In this paper, Todorokite manganese oxides containing Li + with large tunnel structure(sample M5) have been synthesized by hydrothermal methods from natural manganese oxide nano fiber (sample M4). The structure and composition of the samples were characterized and analyzed by XRD, ICP, TGA and DTA. Its electrochemical behavior as a cathode materials for rechargeable lithium ion insertion were studied by galvanostatic charge/discharge measurements. XRD results show that the sample M4 is mainly composed of Birnessite and Vernadite structure. Although the sample M4 shows a high initial capacity of approximately 150 mAh/g, its performances decrease gradually over 30 cycles. It is found that the materials have highly reversible charge/discharge cycling performances after being converted into Todorokite lithium manganese oxide(sample M5). This sample exhibit a single reduction step centered at Ca. 2.8 V and its discharge capacity maintains about 110 mAh/g after 180 cycles at current density of 0.8 mA/cm 2. The novel lithium manganese oxide with a large tunnel structure can be used as 3V cathode material of lithium ion batteries.
Keywords
Lithium ion batteries, Lithium manganese oxides, Todorokite, Birnessite
Publication Date
1999-08-28
Online Available Date
1999-08-28
Revised Date
1999-08-28
Received Date
1999-08-28
Recommended Citation
Deyao Liu, Jinkua You, Wei Chu, Yong Yang, Zugeng Lin.
Structural and Electrochemical Studies on Lithium Manganese Oxide Containing Li + Prepared by Hydrothermal Method for Lithium Ion Batteries[J]. Journal of Electrochemistry,
1999
,
5(3): Article 12.
DOI: 10.61558/2993-074X.3188
Available at:
https://jelectrochem.xmu.edu.cn/journal/vol5/iss3/12
References
1 . 汪继强. 锂离子 蓄电池 技术进展 及市场 前景. 电源技术 , 1996 , 20(4) :147 2 . 夏熙,刘 玲. 二 氧化锰在 锂离子 电池中的 应用. 电源技 术, 1997 , 21(3) :120 3 . 尤金跨, 杨勇,舒东 . 锂离 子电池 纳米电极 材料研 究. 电 化学, 1998 ,4(1) :94 4 . 储 炜,刘德 尧,尤金 跨,杨勇 ,林祖赓. 钡 镁锰 矿/ 水 羟锰 矿 型锂 离子 电 池阴 极材 料 的结 构和 电 化学 性 能研究. 电 化学,1999 , 5(1) :74 5 . 杨勇,舒 东,余海. 大隧道 结构锂 锰氧化物 电极材 料研究. 电源技 术, 1997 ,21 (5) :190
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