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Anionic Redox Chemistry as a Clue for Understanding the Structural Behavior in Layered Cathode Materials
Author(s) -
Lee Wontae,
Yun Soyeong,
Li Hao,
Kim Jaeyoung,
Lee Hayeon,
Kwon Kyeongkeun,
Lee Jin Yong,
Choi YoungMin,
Yoon WonSub
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201905875
Subject(s) - redox , cathode , chemistry , transition metal , chemical physics , ion , materials science , nanotechnology , inorganic chemistry , organic chemistry , catalysis
Abstract The anionic redox chemistries of layered cathode materials have been in focus recently due to an intriguing phenomenon that cannot be described by the number of electrons of transition metal ions. However, even though several studies have investigated the anionic redox chemistry of layered materials in terms of the charge compensation, the relationship between the origin of the structural behavior and anionic redox chemistry in layered materials remains poorly understood. In addition, a simultaneous redox process of transition metal ions could occur through the d bands interaction. Here, it is demonstrated that the anionic redox chemistry is associated with the anisotropic structural behavior of the layered cathode materials albeit without providing additional capacities exceeding the theoretical values. These findings will provide a foundation of a new chapter in the understanding of the properties of materials.