电解质
电池(电)
重量分析
锂(药物)
电极
阴极
材料科学
氧气
航程(航空)
离子
化学
无机化学
化学工程
热力学
物理化学
功率(物理)
有机化学
复合材料
物理
内分泌学
工程类
医学
作者
Zhangquan Peng,Stefan A. Freunberger,Yuhui Chen,Peter G. Bruce
出处
期刊:Science
[American Association for the Advancement of Science (AAAS)]
日期:2012-08-03
卷期号:337 (6094): 563-566
被引量:1772
标识
DOI:10.1126/science.1223985
摘要
The rechargeable nonaqueous lithium-air (Li-O(2)) battery is receiving a great deal of interest because, theoretically, its specific energy far exceeds the best that can be achieved with lithium-ion cells. Operation of the rechargeable Li-O(2) battery depends critically on repeated and highly reversible formation/decomposition of lithium peroxide (Li(2)O(2)) at the cathode upon cycling. Here, we show that this process is possible with the use of a dimethyl sulfoxide electrolyte and a porous gold electrode (95% capacity retention from cycles 1 to 100), whereas previously only partial Li(2)O(2) formation/decomposition and limited cycling could occur. Furthermore, we present data indicating that the kinetics of Li(2)O(2) oxidation on charge is approximately 10 times faster than on carbon electrodes.
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