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Duan L, Shao C, Liao J, Song L, Zhang Y, Li R, Guo S, Zhou X, Zhou H. A P2/P3 Biphasic Layered Oxide Composite as a High-Energy and Long-Cycle-Life Cathode for Potassium-Ion Batteries. Angew Chem Int Ed Engl 2024; 63:e202400868. [PMID: 38440859 DOI: 10.1002/anie.202400868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2024] [Revised: 03/04/2024] [Accepted: 03/04/2024] [Indexed: 03/06/2024]
Abstract
Layered transition metal oxides are extensively considered as appealing cathode candidates for potassium-ion batteries (PIBs) due to their abundant raw materials and low cost, but their further implementations are limited by slow dynamics and impoverished structural stability. Herein, a layered composite having a P2 and P3 symbiotic structure is designed and synthesized to realize PIBs with large energy density and long-term cycling stability. The unique intergrowth of P2 and P3 phases in the obtained layered oxide is plainly characterized by X-ray diffraction refinement, high-angle annular dark field and annular bright field-scanning transmission electron microscopy at atomic resolution, and Fourier transformation images. The synergistic effect of the two phases of this layered P2/P3 composite is well demonstrated in K+ intercalation/extraction process. The as-prepared layered composite can present a large discharge capacity with the remarkable energy density of 321 Wh kg-1 and also manifest excellent capacity preservation after 600 cycles of K+ uptake/removal.
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Affiliation(s)
- Liping Duan
- School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China
| | - Caoyang Shao
- College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, 210093, Nanjing, China
| | - Jiaying Liao
- School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China
| | - Lili Song
- School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China
| | - Yingna Zhang
- School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China
| | - Renke Li
- School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China
| | - Shaohua Guo
- College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, 210093, Nanjing, China
| | - Xiaosi Zhou
- School of Chemistry and Materials Science, Nanjing Normal University, 210023, Nanjing, China
| | - Haoshen Zhou
- College of Engineering and Applied Sciences, National Laboratory of Solid State Microstructures, Nanjing University, 210093, Nanjing, China
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