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Title: Reversible Anionic Redox Activities in Conventional LiNi 1/3 Co 1/3 Mn 1/3 O 2 Cathodes

Journal Article · · Angewandte Chemie
 [1];  [2];  [3];  [4];  [5];  [6]; ORCiD logo [7]
  1. Department of Energy and Materials Engineering Dongguk University—Seoul Seoul 04620 Republic of Korea
  2. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Geballe Laboratory for Advanced Materials Stanford University Stanford CA 94305 USA
  3. Department of Mechanical Engineering Kyung Hee University Yongin 17104 Republic of Korea
  4. Department of Materials Science and Engineering and Department of Physics University of Texas at Dallas Richardson TX 75080 USA
  5. Institute of Advanced Machines and Design Seoul National University Seoul 08826 Republic of Korea
  6. Advanced Light Source Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  7. Department of Materials Science and Engineering Korea University Seoul 02841 Republic of Korea
+ Show Author Affiliations

Abstract Redox reactions of oxygen have been considered critical in controlling the electrochemical properties of lithium‐excessive layered‐oxide electrodes. However, conventional electrode materials without overlithiation remain the most practical. Typically, cationic redox reactions are believed to dominate the electrochemical processes in conventional electrodes. Herein, we show unambiguous evidence of reversible anionic redox reactions in LiNi 1/3 Co 1/3 Mn 1/3 O 2 . The typical involvement of oxygen through hybridization with transition metals is discussed, as well as the intrinsic oxygen redox process at high potentials, which is 75 % reversible during initial cycling and 63 % retained after 10 cycles. Our results clarify the reaction mechanism at high potentials in conventional layered electrodes involving both cationic and anionic reactions and indicate the potential of utilizing reversible oxygen redox reactions in conventional layered oxides for high‐capacity lithium‐ion batteries.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1618990
Journal Information:
Angewandte Chemie, Journal Name: Angewandte Chemie Journal Issue: 22 Vol. 132; ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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