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- Title
Ultralow‐Strain Zn‐Substituted Layered Oxide Cathode with Suppressed P2–O2 Transition for Stable Sodium Ion Storage.
- Authors
Wang, Yanxia; Wang, Liguang; Zhu, He; Chu, Jun; Fang, Yongjin; Wu, Lina; Huang, Ling; Ren, Yang; Sun, Cheng‐Jun; Liu, Qi; Ai, Xinping; Yang, Hanxi; Cao, Yuliang
- Abstract
Layered transition metal oxides have drawn much attention as a promising candidate cathode material for sodium‐ion batteries. However, their performance degradation originating from strains and lattice phase transitions remains a critical challenge. Herein, a high‐concentration Zn‐substituted NaxMnO2 cathode with strongly suppressed P2–O2 transition is investigated, which exhibits a volume change as low as 1.0% in the charge/discharge process. Such ultralow strain characteristics ensure a stable host for sodium ion storage, which significantly improves the cycling stability and rate capability of the cathode material. Also, the strong coupling between the highly reversible capacity and the doping content of Zn in NaxMnO2 is investigated. It is suggested that a reversible anionic redox reaction can be effectively triggered by Zn ions and is also highly dependent on the Zn content. Such an ion doping strategy could shed light on the design and construction of stable and high‐capacity sodium ion host.
- Subjects
SODIUM ions; TRANSITION metal oxides; CATHODES; LIGHTWEIGHT construction; OXIDATION-reduction reaction; PHASE transitions; LIGHTING design
- Publication
Advanced Functional Materials, 2020, Vol 30, Issue 13, p1
- ISSN
1616-301X
- Publication type
Article
- DOI
10.1002/adfm.201910327