Solid-state lithium metal batteries

The combination of lithium metal anodes and lithium-rich manganese-based cathodes is widely regarded as one of the most promising routes toward next-generation high-energy-density batteries. However, their practical implementation remains hindered by interfacial side reactions associated with oxygen activity at high voltages and the instability of lithium metal anodes. In this presentation, I will discuss our recent efforts in electrolyte and interfacial design for high-energy lithium metal batteries. By constructing anion-rich solvation structures and developing electrolyte systems with enhanced oxidative stability, we regulate electrode–electrolyte interfacial chemistry to improve oxygen redox reversibility, mitigate parasitic reactions, and promote more stable lithium plating/stripping behavior. These strategies enable lithium metal batteries with cell-level energy densities exceeding 600 Wh/kg while maintaining favorable cycling stability and safety. In addition, fluorine-free high-voltage electrolyte designs are explored in response to growing PFAS-related concerns, offering potential insights for the development of next-generation high-energy-density solid-state lithium batteries.