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Li 2 MnO 3 : A Catalyst for a Liquid Cl 2 Electrode in Low‐Temperature Aqueous Batteries

Journal Article · · Advanced Materials
 [1];  [2];  [3];  [4];  [1];  [1];  [1];  [5];  [1];  [3];  [2];  [1]
  1. Department of Chemistry Oregon State University Corvallis OR 97331‐4003 USA
  2. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  3. Department of Chemical and Biomolecular Engineering Vanderbilt University Nashville TN 37235 USA
  4. Department of Chemistry University of California Riverside CA 92521 USA
  5. Hewlett‐Packard Co. 1000 NE Circle Blvd. Corvallis OR 97330 USA
Abstract

Li 2 MnO 3 has been contemplated as a high‐capacity cathode candidate for Li‐ion batteries; however, it evolves oxygen during battery charging under ambient conditions, which hinders a reversible reaction. However, it is unclear if this irreversible process still holds under subambient conditions. Here, the low‐temperature electrochemical properties of Li 2 MnO 3 in an aqueous LiCl electrolyte are evaluated and a reversible discharge capacity of 302 mAh g −1 at a potential of 1.0 V versus Ag/AgCl at −78 °C with good rate capability and stable cycling performance, in sharp contrast to the findings in a typical Li 2 MnO 3 cell cycled at room temperature, is observed. However, the results reveal that the capacity does not originate from the reversible oxygen oxidation in Li 2 MnO 3 but the reversible Cl 2 (l)/Cl (aq.) redox from the electrolyte. The results demonstrate the good catalytic properties of Li 2 MnO 3 to promote the Cl 2 /Cl redox at low temperatures.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
2203023
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 47 Vol. 35; ISSN 0935-9648
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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