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- Title
Development and Investigation of a NASICON‐Type High‐Voltage Cathode Material for High‐Power Sodium‐Ion Batteries.
- Authors
Chen, Mingzhe; Hua, Weibo; Xiao, Jin; Cortie, David; Guo, Xiaodong; Wang, Enhui; Gu, Qinfen; Hu, Zhe; Indris, Sylvio; Wang, Xiao‐Lin; Chou, Shu‐Lei; Dou, Shi‐Xue
- Abstract
Herein, we introduce a 4.0 V class high‐voltage cathode material with a newly recognized sodium superionic conductor (NASICON)‐type structure with cubic symmetry (space group P213), Na3V(PO3)3N. We synthesize an N‐doped graphene oxide‐wrapped Na3V(PO3)3N composite with a uniform carbon coating layer, which shows excellent rate performance and outstanding cycling stability. Its air/water stability and all‐climate performance were carefully investigated. A near‐zero volume change (ca. 0.40 %) was observed for the first time based on in situ synchrotron X‐ray diffraction, and the in situ X‐ray absorption spectra revealed the V3.2+/V4.2+ redox reaction with high reversibility. Its 3D sodium diffusion pathways were demonstrated with distinctive low energy barriers. Our results indicate that this high‐voltage NASICON‐type Na3V(PO3)3N composite is a competitive cathode material for sodium‐ion batteries and will receive more attention and studies in the future.
- Subjects
X-ray absorption spectra; SUPERIONIC conductors; ELECTRIC batteries; ACTIVATION energy; CARBON composites
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 6, p2470
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.201912964