Anionic Redox Reactions in Cathodes for Sodium-Ion Batteries

Jae Hyuk Park, In Hwan Ko, Jaewoon Lee, Sangeon Park, Duho Kim, Seung Ho Yu, Yung Eun Sung

Research output: Contribution to journalReview articlepeer-review

16 Citations (Scopus)

Abstract

Intercalation-based cathodes typically rely on the cationic redox activity of transition metals to deliver capacity, but, recently, anionic redox chemistry has emerged as a way to increase the energy density of rechargeable batteries. However, the irreversible structural disorder and voltage fading accompanying oxygen release are major problems preventing commercial use. To overcome these limitations, the connection between structural stability and anionic redox activity must be understood. Here, we present a review of theoretical and experimental progress in anionic redox in sodium intercalation cathodes. First, the effects of structural factors including stacking sequences and cationic vacancies on the reversible capacity originating from anionic redox are discussed. Second, the effects on anionic redox activity of cationic substitution with alkaline earth metals (Li or Na) and the coordination environment are highlighted. Third, the progress and challenges facing materials based on 3d/4d/5d metals are reviewed. Finally, research directions for the development of anionic redox active materials are outlined.

Original languageEnglish
Pages (from-to)625-643
Number of pages19
JournalChemElectroChem
Volume8
Issue number4
DOIs
Publication statusPublished - 2021 Feb 12

Bibliographical note

Funding Information:
I.‐H.K. acknowledges the support by a National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (NRF‐2020R1I1 A1 A01072724). D.K. acknowledges the support from Kyung Hee University in 2020 (KHU‐20201108). S.‐H.Y. acknowledges the support by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (NRF‐2020R1 C1 C1012308). Y.‐E.S. acknowledges the support by the Research Center Program of the Institute for Basic Science (IBS−R006‐A2).

Funding Information:
I.-H.K. acknowledges the support by a National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (NRF-2020R1I1 A1 A01072724). D.K. acknowledges the support from Kyung Hee University in 2020 (KHU-20201108). S.-H.Y. acknowledges the support by a National Research Foundation of Korea (NRF) grant funded by the Korean government (MSIT) (NRF-2020R1 C1 C1012308). Y.-E.S. acknowledges the support by the Research Center Program of the Institute for Basic Science (IBS?R006-A2).

Publisher Copyright:
© 2020 Wiley-VCH GmbH

Keywords

  • anionic redox
  • energy storage
  • sodium
  • sodium-ion batteries
  • transition metals

ASJC Scopus subject areas

  • Catalysis
  • Electrochemistry

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