Journal
ACS MATERIALS LETTERS
Volume 1, Issue 1, Pages 132-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsmaterialslett.9b00103
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering [DE-SC0005397]
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Rechargeable sodium-based batteries are receiving increasing attention as large-scale energy storage systems, because of the abundant resource and low cost of sodium. The widely used nonaqueous liquid electrolytes in sodium-based batteries pose thermal instability, flammability, and risk of safety issues. The booming research in all-solid-state lithium-based batteries also triggers the interest in pursuing all-solid-state sodium-based batteries toward circumventing the safety issues. This study presents a composite-solid-electrolyte approach, which combines the flexibility of a polymer electrolyte and the high ionic conductivity of a ceramic electrolyte, for the development of all-solid-state sodium batteries. A composite electrolyte comprising a poly(ethylene oxide) matrix, NaClO4 salt, and a ceramic Na+-ion conductor (Na3Zr2Si2PO12) dispersed in it has been fabricated with a facile slurry-casting method. The resulting PEO-NaClO4-Na3Zr2Si2PO12 composite electrolyte shows enhanced Na+-ion conductivity, improved dendrite suppression, reduced interfacial problems, and an elastic feature. With the PEO-NaClO4-Na3Zr2Si2PO12 composite electrolyte, all-solid-state batteries with a sodium- metal anode and a Na2MnFe(CN)(6) cathode show stable long-term cycling performance.
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