Ultralow-Strain Zn-Substituted Layered Oxide Cathode with Suppressed P2–O2 Transition for Stable Sodium Ion Storage
- Wuhan Univ. (China). Hubei Key Lab. of Electrochemical Power Sources
- City Univ. of Hong Kong (Hong Kong)
- Xiamen Univ. (China)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- City Univ. of Hong Kong (Hong Kong); City Univ. of Hong Kong (Hong Kong). Shenzhen Research Inst.
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. Additionally, 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.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division; National Natural Science Foundation of China (NNSFC); National Key Research and Development Program of China
- Grant/Contract Number:
- AC02-06CH11357
- OSTI ID:
- 1763386
- Journal Information:
- Advanced Functional Materials, Journal Name: Advanced Functional Materials Journal Issue: 13 Vol. 30; ISSN 1616-301X
- Publisher:
- WileyCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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