Li 2 MnO 3 : A Catalyst for a Liquid Cl 2 Electrode in Low‐Temperature Aqueous Batteries
- Department of Chemistry Oregon State University Corvallis OR 97331‐4003 USA
- Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
- Department of Chemical and Biomolecular Engineering Vanderbilt University Nashville TN 37235 USA
- Department of Chemistry University of California Riverside CA 92521 USA
- Hewlett‐Packard Co. 1000 NE Circle Blvd. Corvallis OR 97330 USA
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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