多收费
阴极
材料科学
热的
水溶液
电化学
电池(电)
大气温度范围
功率密度
阿累尼乌斯方程
活化能
化学
分析化学(期刊)
核工程
热力学
电极
功率(物理)
环境化学
物理化学
物理
工程类
作者
Yuriy Mikhaylik,James R. Akridge
摘要
This paper relates to development of a new generation of Li/S rechargeable batteries with energy density exceeding 180 Wh/kg and rate capability comparable with aqueous systems. The cells demonstrate 5 C discharge rate at −40°C. Retained energy and capacity at −40°C exceeded 60 and 80%, respectively. At room temperature cells generate specific power up to 750 W/kg. Cells are inherently protected from overcharge at low and room temperatures by internal chemistry and can sustain 30 times overcharge. It was shown that at −40°C sulfur cathode discharge includes at least five steps, in contrast to the known two steps at room temperature. Thermal effects related to different charge-discharge steps were analyzed. Cell thermal model including Ohm and Arrhenius parts of polarization allowed simulation Ragone plots and capacity over a wide range of currents and temperatures. © 2003 The Electrochemical Society. All rights reserved.
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