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J Am Chem Soc. 2011 Apr 20;133(15):5756-9. doi: 10.1021/ja201118f. Epub 2011 Mar 28.

Aqueous cathode for next-generation alkali-ion batteries.

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1
Texas Materials Institute, The University of Texas at Austin, Austin, Texas 78712, United States.

Abstract

The lithium-ion batteries that ushered in the wireless revolution rely on electrode strategies that are being stretched to power electric vehicles. Low-cost, safe electrical-energy storage that enables better use of alternative energy sources (e.g., wind, solar, and nuclear) requires an alternative strategy. We report a demonstration of the feasibility of a battery having a thin, solid alkali-ion electrolyte separating a water-soluble redox couple as the cathode and lithium or sodium in a nonaqueous electrolyte as the anode. The cell operates without a catalyst and has high storage efficiency. The possibility of a flow-through mode for the cathode allows flexibility of the cell design for safe, large-capacity electrical-energy storage at an acceptable cost.

PMID:
21443190
DOI:
10.1021/ja201118f

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