Chemical Overcharge and Overdischarge Protection for Lithium-Ion Batteries

摘要

Rechargeable lithium-ion batteries suitable for the mass consumer market require robust safety and tolerance to repeated overdis-charge and overcharge to avoid costly charge control circuitry and to allow simple replacement of individual cells by consumers. A chemical redox shuttle additive to the electrolyte is shown to provide this protection. The molecule, 2,5 ditertbutyl-1,4-dimethoxybenzene, provides overcharge and overdischarge protection for hundreds of charge-discharge cycles in both single cells and series-connected batteries.