Review of gel-type polymer electrolytes for lithium-ion batteries

This review describes the advantages and characteristics of employing polym er electrolytes in solid-state lithium-ion batteries. Criteria for an ideal polymer electrolyte and the differences between polyelectrolytes are discu ssed. The emphasis of this article is on plasticized or gelled electrolyte systems. Hence, the review focuses on four plasticized systems which have r eceived particular attention from a practical viewpoint, i.e., poly(ethylen e oxide) (PEO)-, poly(acrylonitrile) (PAN)-, poly(methyl methacrylate) (PMM A)-, and poly(vinylidene fluoride) (PVdF)-based electrolytes. Some critical concepts and points associated with this emerging technology that still re quire attention are discussed in the final part of the review. (C) 1999 Els evier Science S.A. All rights reserved.