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Batteries

Breakthrough in Lithium-Metal Battery Technology

Strategic Insights

— 2 min read

Researchers from the Chinese Academy of Sciences have developed a novel in situ hybrid crosslinked PDOL quasi-solid-state electrolyte, which exhibits significantly enhanced oxidative stability while maintaining high ion-conducting properties. This breakthrough has the potential to advance high-performance lithium-metal batteries, overcoming the current limitations of linear PDEs. The new electrolyte, dubbed HCPDE, has demonstrated exceptional cyclability and stability in both Li/Li and Li/NiCoMn cells, achieving a capacity retention of 91.7% after 200 cycles.

Key Takeaways:

  • The development of poly(dioxolane) quasi-solid-state electrolytes (PDEs) via in situ polymerization has emerged as a promising strategy for the advancement of high-performance lithium-metal batteries.
  • The HCPDE electrolyte exhibits significantly enhanced oxidative stability while maintaining high ion-conducting properties, with an ionic conductivity of 1.95 x 10-4 S cm-1 at 30 degrees C and a Li+ transference number of 0.74.
  • The HCPDE stabilizes the electrolyte/electrode interphase and demonstrates exceptional cyclability in both Li/Li and Li/NiCoMn cells.
  • The designed HCPDE achieves a capacity retention of 91.7% after 200 cycles at 0.5C and maintains 85.7% capacity retention over 150 cycles in the pouch cell.
  • The research provides new insights into the development of ether-based quasi-solid-state lithium metal batteries.
  • The study was funded by the National Natural Science Foundation of China (NSFC), the Science & Technology Commission of Shanghai Municipality (STCSM), and the Science and Technology Cooperation Program of Shanghai Jiao Tong in the Inner Mongolia Autonomous Region-Action Plan of Shanghai Jiao Tong University.
  • Additional authors include Wenqin Ma, Xue Wang, Yuzhou Bai, Yuan Liu, Ling Zhang, Wujie Dong, and Fuqiang Huang.

Statistics:

  • The HCPDE exhibits an ionic conductivity of 1.95 x 10-4 S cm-1 at 30 degrees C.
  • The Li+ transference number of the HCPDE is 0.74.
  • The HCPDE achieves a capacity retention of 91.7% after 200 cycles at 0.5C in the Li/NiCoMn cell.
  • The pouch cell maintains 85.7% capacity retention over 150 cycles.
  • The research has been peer-reviewed and published in the journal Nanoscale.

Sources:

  • NewsRx LLC. Reports from Chinese Academy of Sciences Provide New Insights into Electronics (in Situ Hybrid Crosslinked Poly-dol Quasi-solid-state Electrolytes for Stable High-voltage Lithium Metal Batteries). News of Science. October 26, 2025; p 3171.
  • Royal Society of Chemistry. Nanoscale. pubs.rsc.org/en/journals/journalissues/nr.
  • Chinese Academy of Sciences. Yufeng Tang, Shanghai Institute of Ceramics, State Key Lab High Performance Ceram & Superfine M, Shanghai 200050, People's Republic of China.

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