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Single-crystalline Mn-based oxide as a high-rate and long-life cathode material for potassium-ion battery
- Source :
- eScience, Vol 3, Iss 1, Pp 100081- (2023)
- Publication Year :
- 2023
- Publisher :
- KeAi Communications Co. Ltd., 2023.
-
Abstract
- Mn-based oxides are promising cathode materials for potassium-ion batteries due to their high theoretical capacity and abundant raw materials. However, the anisotropic properties of their conventional polycrystalline structures lead to insufficient rate capability and cycle life. Here, a single-crystal Mn-based layered oxide, P3′-type K0.35Mn0.8Fe0.1Cu0.1O2 (KMFCO), is designed and synthesized through a bimetallic co-induction effect and used as a cathode for potassium-ion battery. Benefiting from a unique single-crystal structure that is devoid of grain boundaries, it achieves a higher K+ transport rate and a reduced volume change during the K+ intercalation/deintercalation process. Accordingly, the single-crystal P3′-type KMFCO delivers superior rate capability (52.9 mAh g−1 at 1000 mA g−1) and excellent cycling stability (91.1% capacity retention after 500 cycles at 500 mA g−1). A full cell assembled with the P3′-type KMFCO cathode and a graphite anode also exhibits a high reversible capacity (81.2 mAh g−1 at 100 mA g−1) and excellent cycling performance (97% capacity retention after 300 cycles). The strategy of developing single-crystal materials may offer a new pathway for maintaining structural stability and improving the rate capability of layered manganese oxide cathodes and beyond.
Details
- Language :
- English
- ISSN :
- 26671417
- Volume :
- 3
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- eScience
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.3b61357d82c742a88469a0acc1d71c82
- Document Type :
- article
- Full Text :
- https://doi.org/10.1016/j.esci.2022.10.007