Breakthrough in Solid-State Lithium Metal Batteries: Advancements in Ionic Conductivity and Stability

Strategic Insights -

Research published in Materials Today Energy reveals significant advancements in the development of flexible and safe solid-state lithium metal batteries (SSLMBs). Solid polymer electrolytes (SPEs) hold great promise in achieving high ionic conductivity and good self-supporting capability. However, achieving these properties remains a significant challenge. A team of researchers from the Beijing University of Technology has fabricated free-standing siloxane-polyether-based crosslinked solid polymer electrolytes (MSK-SPEs) with improved ionic transport and mechanical property through regulating the crosslinking degree of the polymer.

Key Takeaways:

  • The researchers fabricated MSK-SPEs with improved ionic conductivity of 5.16 x 10(-4) S cm(-1) at room temperature and electrochemical stability within similar to 4.75 V.
  • The optimal MSK-SPE2 showed cycling stability for 100 cycles with a discharge capacity of similar to 150.8 mAh g(-1) at 0.1 C and 60 degrees C.
  • The assembled Li/MSK-SPE2/LiFePO4 cell demonstrated potential application in high-performance SSLMBs.
  • Mingye Li, Peipei Ding, Zihao Wang, Hongxia Guo, and Jiawei Wang contributed to the research alongside Fan Li, who is the lead author.
  • The financial support for the research came from the National Natural Science Foundation of China (NSFC).

Statistics:

  • Ionic conductivity of 5.16 x 10(-4) S cm(-1) at room temperature
  • Electrochemical stability within similar to 4.75 V
  • Cycling stability for 100 cycles with a discharge capacity of similar to 150.8 mAh g(-1) at 0.1 C and 60 degrees C.
  • The research was financially supported by the National Natural Science Foundation of China (NSFC) with grant number not specified.

Sources:

  • Fan Li et al., "Free-standing Siloxane-polyether-based Crosslinked Solid Electrolyte for Advanced Lithium Batteries", Materials Today Energy, 2025;52.
  • National Natural Science Foundation of China (NSFC)
  • Beijing University of Technology, College of Materials Science and Engineering, State Key Lab Mat Low Carbon Recycling, Beijing 100124, People's Republic of China.