期刊
NATURE ENERGY
卷 2, 期 5, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/nenergy.2017.36
关键词
-
资金
- European Research Council (ERC) under European Union's Horizon research and innovation programme [636069]
- Austrian Federal Ministry of Economy, Family and Youth
- Austrian National Foundation for Research, Technology and Development
- Austrian Science Fund (FWF) [P26870-N19]
- Austrian Science Fund (FWF) [P26870] Funding Source: Austrian Science Fund (FWF)
- European Research Council (ERC) [636069] Funding Source: European Research Council (ERC)
Non-aqueous metal-oxygen batteries depend critically on the reversible formation/decomposition of metal oxides on cycling. Irreversible parasitic reactions cause poor rechargeability, efficiency, and cycle life, and have predominantly been ascribed to the reactivity of reduced oxygen species with cell components. These species, however, cannot fully explain the side reactions. Here we show that singlet oxygen forms at the cathode of a lithium-oxygen cell during discharge and from the onset of charge, and accounts for the majority of parasitic reaction products. The amount increases during discharge, early stages of charge, and charging at higher voltages, and is enhanced by the presence of trace water. Superoxide and peroxide appear to be involved in singlet oxygen generation. Singlet oxygen traps and quenchers can reduce parasitic reactions effectively. Awareness of the highly reactive singlet oxygen in non-aqueous metal-oxygen batteries gives a rationale for future research towards achieving highly reversible cell operation.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据