A Sodium-Ion Battery with a Low-Cost Cross-Linked Gel-Polymer Electrolyte

Hongcai Gao, Weidong Zhou, Kyusung Park, John B. Goodenough*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

145 Citations (Scopus)

Abstract

The design of a sodium-ion rechargeable battery with an antimony anode, a Na3V2(PO4)3 cathode, and a low-cost composite gel-polymer electrolyte based on cross-linked poly(methyl methacrylate) is reported. The application of an antimony anode, on replacement of the sodium metal that is commonly used in sodium-ion half-cells, reduces significantly the interfacial resistance and charge transfer resistance of a sodium-ion battery, which enables a smaller polarization for a sodium-ion full-cell Sb/Na3V2(PO4)3 running at relatively high charge and discharge rates. The incorporation of the gel-polymer electrolyte is beneficial to maintain stable interfaces between the electrolyte and the electrodes of the sodium-ion battery at elevated temperature. When running at 60 °C, the sodium-ion full-cell Sb/Na3V2(PO4)3 with the gel-polymer electrolyte exhibits superior cycling stability compared to a battery with the conventional liquid electrolyte.

Original languageEnglish
Article number1600467
JournalAdvanced Energy Materials
Volume6
Issue number18
DOIs
Publication statusPublished - 21 Sept 2016
Externally publishedYes

Keywords

  • NASICON cathodes
  • alloy anodes
  • energy storage
  • polymer electrolytes
  • sodium-ion batteries

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