EFFECT OF POLYMER BINDERS ON HIGH-TEMPERATURE PERFORMANCE OF PLASTIC Li-ION (PLION~(TM)) BATTERIES

摘要

LiCoO_2/graphite-based plastic lithium-ion cells were prepared with electrodes made using PVDF-HFP binders differing in their HFP content, and from a PVDF homopolymer, bonded to microporous polyolefin separators. The storage and cycling performance of these cells at 60℃and 80℃was evaluated, with particular emphasis in separating the binder contribution from other parameters, such as cell residual water content and electrochemical testing protocols. Therefore, results that can be ascribed to the binder effect are shown, and supported by the mechanical and thermal behavior of the polymers in the presence of hot battery electrolyte.