Degradation of Organic Electrolyte in Primary Lithium/Manganese Dioxide Cells (Electrolyte Polymerization)

摘要

Lithium/manganese dioxide pouch cells using ternary electrolytes consisting of dimethoxyethane, propylene carbonate and tetrahydrafuran or dioxolane, often swell when stored due to gas generation. By the use of gas chromatography, hydrogen and carbon dioxide were detected as the major gaseous component in the swollen cells. Additionally, lithium/manganese dioxide cells exhibit a non-recoverable reduction in rate capability after storage. This reduction in rate capability of the cell is a direct result of electrolyte polymerization decreasing the conductivity of the electrolyte. This paper will present laboratory results generated from a study of the chemical degradation reaction of electrolyte in lithium/manganese dioxide cells.