A Single-Ion Conducting Borate Network Polymer as a Viable Quasi-Solid Electrolyte for Lithium Metal Batteries

ANP-5: anionic network polymer-5, NNP: neutral network polymer Composite cathode: LFP/ANP-5/PVDF/C

Scientific Achievement

An anionic network polymer, ANP-5, membrane exhibits high room temperature ionic conductivity and selectivity for Li+ ion conduction, outstanding electrochemical stability, and flame retardancy.

Significance and Impact

The single-ion conducting anionic network polymers with desirable electrochemical properties and high synthetic tunability are promising candidate electrolytes for a development of safe, high-performance quasi-solid-state lithium metal batteries.

Research Details

  • The highly interpenetrated ANP-5 powder material, consisting of weakly coordinating anionic borate nodes linked by crosslinakable neutral units, was further processed into a robust membrane through a post-synthetic crosslinking.
  • ANP-5 materials exhibits a high room-temperature conductivity (1.5 × 10−4 S/cm) and an exceptional selectivity for Li-ion conduction (tLi+ = 0.95).
  • A battery prototype consisting of ANP-5 membrane exhibits impressive rate performance and stability over 100 charge/discharge cycles

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DOI: 10.1002/adma.201905771

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