期刊
JOURNAL OF POWER SOURCES
卷 223, 期 -, 页码 312-318出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.09.052
关键词
Cobalt oxide/double layer electrode; Lithium air batteries; Charge-discharge profiles; Cycle ability; Secondary ion mass spectrometry
资金
- Science & Technology Commission of Shanghai Municipality [08DZ2270500, 09JC1401300]
- 973 Program of China [2011CB933300]
A double-layer structural air cathode consisting of diamond like carbon (DLC) active layer and CoOx catalytic layer is designed and its catalytic effect for Li-air batteries both in carbonate and ether based electrolytes are tested. Ethylene carbonate (EC)/dimethyl carbonate (DMC) based Li-air cell using this double-layer electrode as air cathode exhibits significant improvement in discharge/charge electrochemical performance but suffers from electrolyte decomposition as proved by Fourier transform infrared (FTIR) and secondary ion mass spectrometry (SIMS) measurements. In 1,2-dimethoxyethane (DME) based electrolyte, CoOx/DLC double layer electrode shows high catalytic activity towards oxygen evolution reaction (OER). Furthermore, over 30 cycles is achieved with a capacity of more than 2000 mAh g(-1) by using CoOx/DLC double layer electrode, which makes it a promising air electrode for Li-air batteries. (C) 2012 Elsevier By. All rights reserved.
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