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- Title
Design of Cu‐Substituted O3‐Type NaFe<sub>0.5</sub>Mn<sub>0.5</sub>O<sub>2</sub> Cathode Materials for Sodium‐Ion Batteries.
- Authors
Wang, Jia‐Lin; Wu, Lin‐Rong; Zhang, Hai‐Xia; Wang, Hao‐Rui; Zhang, Ding; Duan, Xiao‐Chuan
- Abstract
O3‐type Fe/Mn‐based layered oxide cathode materials with abundant reserves have a promising prospect in sodium‐ion batteries. However, the electrochemical reversibility of most O3‐type Fe/Mn‐based oxide cathode materials is still not high enough. Herein, the effect of different Cu contents on the electrochemical properties of O3‐NaFe0.50Mn0.50O2 materials is systematically investigated. The as‐prepared NaFe0.30Mn0.50Cu0.20O2 cathode achieves the synergistic optimization of the interface and bulk phase. It shows superior electrochemical performance, with an initial discharge specific capacity of 114 mAh g−1 at 0.1 C, a capacity retention rate of 94 % after 100 cycles at 0.5 C, and excellent chemical stability in air and water. In addition, the sodium ion full battery based on NaFe0.30Mn0.50Cu0.20O2 cathode and hard carbon anode has a capacity retention rate of 81 % after 100 cycles. This research provides a useful approach for the preparation of low‐cost and high‐performance O3‐type layered cathode materials.
- Subjects
SODIUM ions; COPPER; CHEMICAL stability; JAHN-Teller effect; STORAGE batteries; CATHODES
- Publication
Chemistry - A European Journal, 2023, Vol 29, Issue 42, p1
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.202301014