On the role of water contamination in rechargeable Li batteries
On the role of water contamination in rechargeable Li batteries
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DOI：
10.1016/s0013-4686(99)00312-6
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发表时间：
1999-01-01
影响因子：
6.6
通讯作者：
Dan, P
中科院分区：
文献类型：
--
作者：
Aurbach, D;Weissman, I;Dan, P
许多阴极材料如LiMnO 2可能是高度吸湿的，因此，将相当大的水污染引入Li电池中。水与锂阳极反应，这强烈影响其表面化学。在这项工作中，我们研究了一些现象，由于在锂锂锰电池的阴极材料含有1-3二氧戊环/LiAsF 6的解决方案，水污染。当这些电池包含暴露于空气的阴极时，它们的电解质溶液被水污染，水与锂反应，从而形成氢气。我们发现含有湿阴极的放电电池会阻止氢的释放。我们探讨了这种现象的几种可能的解释。得出的结论是，含水的LixMnO 2的锂化相当大地抑制了水释放到电解质溶液中。讨论了溶液中水的存在对锂阳极性能的影响，（C）1999 Elsevier Science Ltd.保留所有权利。
Many cathode materials such as LiMnO2 can be highly hygroscopic and thus, introduce considerable water contamination into Li batteries. Water reacts with the Li anode, and this strongly affects its surface chemistry. In this work, we investigated some phenomena related to water contamination due to the cathode material in Li-LixMnO2 cells containing 1-3 dioxolane/LiAsF6 solutions. When these cells contain cathodes which were exposed to air, their electrolyte solutions become contaminated with water, which reacts with lithium and thus, hydrogen gas is formed. We discovered that discharging cells containing wet cathodes stops this liberation of hydrogen. We explored several possible explanations for this phenomenon. It was concluded that lithiation of water-containing LixMnO2 considerably inhibits the liberation of water into the electrolyte solution. The effect of the presence of water in solutions on the properties of the Li anode is discussed, (C) 1999 Elsevier Science Ltd. All rights reserved.