Influence of Additives in Electrolyte Solutions on Safety and Cycle Life of Lithium Cells

Abstract

The influence of additives in electrolyte solutions on overcharge tolerance and cycle life of rechargeable lithium cells is examined. The electrolyte solution employed in this work was 1 M LiClO₄-propylene carbonate. The additives we studied were ten organic aromatic compounds. Biphenyl is well-known as an overcharge protection additive. The purpose of this work was to find additives with higher oxidation potential and longer charge-discharge cycle life than biphenyl. Summarizing the results, cyclohexylbenzene and hydrogenated diphenyleneoxide exhibited better performance than biphenyl.