锂离子电池(lithium ion batteries,LIBs)在储能领域已取得了巨大的成功.然而,商用LIBs含有高挥发性易燃有机电解液,使其存在严重的安全隐患.固态聚合物电解质具有解决相应安全性问题的潜力,有望成为下一代高安全性全固态LIBs的电解质材料.然而,固态聚合物电解质存在离子电导率不高等问题,限制了其在固态LIBs中的实际应用.研究者们为了提高该类电解质的离子电导率、锂离子迁移数等综合电化学性能,已在寻找新锂盐、对聚合物进行改性以及向聚合物电解质中添加填料等方面进行了较多的研究.本文简要概述了固态聚合物电解质的锂离子传导机理以及在提高固态聚合物电解质综合电化学性能方面的研究进展.
Work mechanism and research progress of solid polymer electrolytes for lithium-ion batteries
Lithium ion batteries (LIBs) have achieved great success in the field of energy storage.However,commercial LIBs contain flammable organic liquid electrolytes,which leads to safety concerns.Solid polymer electrolytes are widely considered as promising candidates of next-generation electrolytes for all-solid-state LIBs which are able to conquer the safety issues.Unfortunately,solid polymer electrolytes suffer from poor ionic conductivity,which hampers practical application.In order to improve the ionic conductivity,scientists have explored different approaches,including searching for new salts,modifying polymer matrix and incorporation of fillers.This review focuses on introducing Li+ transport mechanism and research progress in solid polymer electrolytes for safe and high performance LIBs.
lithium ion batterysolid polymer electrolyteall-solid-state batteryenergy storage
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