尖晶石
电解质
材料科学
锂(药物)
阴极
电化学
聚合物
化学工程
氧化物
热稳定性
温度循环
比能量
电极
热的
化学
复合材料
冶金
热力学
物理化学
物理
工程类
内分泌学
医学
作者
Yongyao Xia,Kuniaki Tatsumi,Takuya Fujieda,Pier Paolo Prosini,Tetsuo Sakai
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2000-01-01
卷期号:147 (6): 2050-2050
被引量:55
摘要
We have used a lithiated , , with ordered alternating one‐dimensional [1 × 2] and [1 × 1] channels as a cathode material in solid‐state lithium/polymer cells. An optimized cell can operate at moderate temperatures (40–80°C). delivers a rechargeable capacity of 160 mAh/g with a flat potential plateau at ca. 3.0 V vs. at the C/3 rate and 65°C, corresponding to a specific energy of 450 Wh/kg of the pure oxide. Cells show good rate capability and excellent cyclability when cycled between 2.7 and 3.5 V at 80% depth of discharge, whereas a capacity decline was observed when cycled between 2.0 and 3.5 V. Capacity fading upon cycling is believed to be due to the formation of a thin layer of spinel phase (transformation to from ) on the particle surfaces, as well as to increased cell resistance during charge/discharge cycling. The cell self‐discharge at high temperature and the thermal stability of in contact with the polymer electrolyte are also discussed. © 2000 The Electrochemical Society. All rights reserved.
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