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Updated: Jan 19, 2026

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Revealing an Interconnected Interfacial Layer in Solid-State Polymer Sodium Batteries.

Chenglong Zhao1,2, Lilu Liu1,2, Yaxiang Lu1,2

  • 1Key Laboratory for Renewable Energy, Beijing Key Laboratory for New Energy Materials and Devices, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.

Angewandte Chemie (International Ed. in English)
|September 17, 2019
PubMed
Summary
This summary is machine-generated.

Researchers developed safer, high-energy rechargeable sodium batteries using polymer solid electrolytes and a novel composite anode. This interface engineering suppresses dendrites, enabling long-lasting, high-performance solid-state sodium batteries.

Keywords:
composite metal anodesinterfacial layerssodium batteriessolid polymer electrolytesstable cycling

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Nonaqueous liquid electrolytes in rechargeable sodium batteries pose safety risks and limit energy density.
  • Transitioning to polymer solid electrolytes offers potential for safer, higher-energy-density sodium batteries.
  • Key challenges lie in managing the interface between sodium (Na)-metal anodes and polymer electrolytes.

Purpose of the Study:

  • To investigate and improve the interface properties between Na-metal anodes and polymer electrolytes.
  • To establish a stable and efficient interface for solid-state sodium batteries.
  • To enhance the performance and cycle life of rechargeable sodium batteries.

Main Methods:

  • Systematic investigation of interface properties between Na-metal anodes and polymer electrolytes.
  • Development of a composite Na/C metal anode.
  • Fabrication and testing of full solid-state polymer sodium batteries utilizing a Na3V2(PO4)3 cathode.

Main Results:

  • Established chemical bonding between the carbon matrix of the anode and the solid polymer electrolyte.
  • Prevented anode delamination and promoted homogeneous Na plating/stripping, suppressing dendrite formation.
  • Achieved ultrahigh capacity retention (>92% after 2,000 cycles, >80% after 5,000 cycles) and outstanding rate capability.

Conclusions:

  • The developed composite Na/C anode significantly enhances the stability and performance of solid-state polymer sodium batteries.
  • Interface engineering is crucial for overcoming challenges in Na-metal anode and polymer electrolyte systems.
  • This work paves the way for safer, high-energy-density, and long-lasting rechargeable sodium batteries.