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

Journal Article · · Angewandte Chemie
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [2]; ORCiD logo [1]
  1. Department of Chemistry Oregon State University Corvallis OR 97331-4003 USA
  2. School of Chemical, Biological, and Environmental Engineering Oregon State University Corvallis OR 97331 USA
  3. Hewlett-Packard Co. 1000 NE Circle Blvd. Corvallis OR 97330 USA
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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. The results open an avenue to use carbonate as a charge carrier for batteries to serve for the consumption and storage of CO 2 .

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1871846
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 31 Vol. 134; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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