固态锂硫电池中硫化物固态电解质的研究现状

Research Status of Sulfi de Solid Electrolyte in Solid-State Lithium Sulfur Battery

全固态电池选用固态电解质代替液态电解质,其化学性质稳定,能够改善金属锂负极的安全隐患,而硫化物固态电解质由于其高离子导率和可加工性因此受到了广泛的关注。然而,与液态电解质相比,固态电解质的低离子导率和固固接触导致的界面问题依然制约其实际应用。本文讨论了固态锂硫电池中硫化物固态电解质目前的问题和研究现状,并从离子导率和界面问题两方面介绍了全固态锂硫电池的发展趋势,为全固态锂硫电池的规模化应用提供参考。

The solid state battery uses solid electrolyte instead of liquid electrolyte;the former electrolyte exhibits stable chemical properties and thus improves the potential safety hazard of metal lithium negative electrode.Sulfide solid electrolyte attracted extensive attention due to its high ionic conductivity and process capacity.However,compared with liquid electrolyte,the low ionic conductivity of solid electrolyte and the interface problems caused by solid-solid contact still restrict its practical application.This review discusses the current problems and research status of sulfide solid electrolyte in solid-state lithium sulfur battery,and introduces the development trend of all solid-state lithium sulfur battery from both ion conduc-tivity and interface,so as to provide reference for the large-scale application of solid-state lithium sulfur batteries.