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DOE OSTI · 1981389

From Copper to Basic Copper Carbonate: A Reversible Conversion Cathode in Aqueous Anion Batteries

Gallagher, Trenton C.·Wu, Che‐Yu·Lucero, Marcos·Sandstrom, Sean K.·Hagglund, Lindsey·Jiang, Heng·Stickle, William·Feng, Zhenxing·Ji, Xiulei
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Abstract

Dual-ion batteries that use anions and cations as charge carriers represent a promising energy-storage technology. However, an uncharted area is to explore transition metals as electrodes to host carbonate in conversion reactions. Here we report the reversible conversion reaction from copper to Cu 2 CO 3 (OH) 2 , where the copper electrode comprising K 2 CO 3 and KOH solid is self-sufficient with anion-charge carriers. This electrode dissociates and associates K + ions during battery charge and discharge. The copper active mass and the anion-bearing cathode exhibit a reversible capacity of 664 mAh g –1 and 299 mAh g –1 , respectively, and relatively stable cycling in a saturated mixture electrolyte of K 2 CO 3 and KOH. Finally, the results open an avenue to use carbonate as a charge carrier for batteries to serve for the consumption and storage of CO 2 .

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRYChemistryanionsbatteriescarbonatecopper

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Gallagher, Trenton C., Wu, Che‐Yu, Lucero, Marcos, Sandstrom, Sean K., Hagglund, Lindsey, Jiang, Heng, Stickle, William, Feng, Zhenxing, Ji, Xiulei. 2022-05-06. From Copper to Basic Copper Carbonate: A Reversible Conversion Cathode in Aqueous Anion Batteries. https://doi.org/10.1002/anie.202203837

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