金属锂电池用复合固体电解质的研究进展

Research progress in composite solid electrolyte for lithium metal battery

固体电解质一般分为聚合物、无机陶瓷及由两者组成的复合体系。聚合物/无机陶瓷复合固体电解质综合了聚合物电解质高柔韧性带来的界面稳定性和无机陶瓷电解质室温离子电导率高的优点,广泛应用于金属锂电池。综述以聚合物为主体的聚环氧乙烷(PEO)和聚丙烯腈(PAN)复合电解质,及以无机陶瓷材料为主体的石榴石型、NASICON型和钙钛矿型复合电解质的研究现状及Li+传输机理;展望电解质今后将朝着高离子电导率、低界面阻抗的方向发展。

Solid electrolytes were generally divided into polymers,inorganic ceramics and their composite systems.Polymer/inorganic ceramic composite solid electrolyte combined the advantages of interfacial stability brought by high flexibility of polymer electrolyte and high room temperature ionic conductivity of inorganic electrolyte,which was widely used in lithium metal battery.The research status and Li+transport mechanism of polyethylene oxide(PEO)and polyacrylonitrile(PAN)composite electrolytes based on polymers,garnet-type,NASICON-type and perovskite-type composite electrolytes based on inorganic ceramic materials were reviewed.It was prospected that the electrolyte would develop towards high ionic conductivity and low interface resistance from now on.