全固态锂离子电池正极界面的研究进展

全固态锂离子电池以其高能量密度和高安全性成为具有广泛应用前景的下一代储能技术。然而,全固态锂离子电池的容量过低和寿命过短限制了其在储能领域的应用。其中,正极材料(活性材料、电子导电剂、离子导电剂及固态电解质等)固-固界面稳定性不佳限制了全固态锂离子电池的容量利用率和循环寿命。综上,介绍和讨论了正极材料固-固界面稳定性及优化方法,包括化学稳定性、电化学稳定性、机械稳定性和热稳定性等,同时归纳了常用的全固态锂离子电池正极材料固-固界面优化方法,为全固态锂离子电池的开发和应用提供参考。

Research Progress on the Cathodic Interfaces of All-Solid-State Lithium-Ion Batteries

All-solid-state lithium-ion batteries(ASS-LIBs)is a promising next generation energy storage(EES)technology due to their high energy density and excellent safety.However,low capacity and short cycle life of ASS-LIBs restrict their application in EES.The cathodic capacity utilization and cycle life of ASS-LIBs are limited by the poor solid-solid interfacial stability of cathodic materials(including active material,electronic conductor,ionic conductor and the solid-state electrolyte).In this review,the stability of solid-solid interface of cathodic materials in ASS-LIBs and the optimization methods are overviewed and discussed,including chemical stability,electrochemical stability,mechanical stability and thermal stability.Meanwhile,the common stratagem for the stability of solid-solid cathodic interface optimization in ASS-LIBs is summarized.We hope that the review can provide comprehensive information for the development and application of ASS-LIBs.