On the role of water contamination in rechargeable Li batteries

D. Aurbach, I. Weissman, A. Zaban, P. Dan

Research output: Contribution to journalArticlepeer-review

83 Scopus citations

Abstract

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.

Original languageEnglish
Pages (from-to)1135-1140
Number of pages6
JournalElectrochimica Acta
Volume45
Issue number7
DOIs
StatePublished - 31 Dec 1999

Bibliographical note

Funding Information:
This work was partially supported by Tadiran–Battery Division, the Belfer Fund for studies related to energy storage and conversion (Israel), and the Israeli Ministry of National Infrastructure and Energy.

Keywords

  • Electrolyte solution
  • Li batteries
  • Water contamination

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