Over 500 Wh kg –1 Solid-State Lithium Metal Batteries with Long Cycling Stability Using In Situ Polymerized Electrolyte

Lithium metal batteries (LMBs) are regarded as the “holy grail” of next-generation energy storage systems due to their potential for high energy density. However, uncontrolled lithium dendrite growth on lithium metal anodes leads to poor cycling stability and serious safety risks, hindering their practical deployment. Herein, we design an in situ polymerized POSS-based gel polymer electrolyte (POSS-GPE) that exhibits high ionic conductivity (3.04 mS cm–1 at room temperature), excellent oxidative stability (>4.9 V vs Li+/Li), broad compatibility with diverse electrode materials, and intrinsic flame retardancy. The POSS-GPE establishes an anion-rich solvation environment that promotes the formation of robust,…

• NN
  National Natural Science Foundation of China

  Award: 52090034
• NS
  Natural Science Foundation of Tianjin City

  Award: 24JCZXJC00360
• NK
  National Key Research and Development Program of China

  Award: 2020YFA0711500