Tuning local chemistry of P2 layered-oxide cathode for high energy and long cycles of sodium-ion battery
- Authors
- Wang, Chenchen; Liu, Luojia; Zhao, Shuo; Liu, Yanchen; Yang, Yubo; Yu, Haijun; Lee, Suwon; Lee, Gi-Hyeok; Kang, Yong-Mook; Liu, Rong; Li, Fujun; Chen, Jun
- Issue Date
- 15-4월-2021
- Publisher
- NATURE RESEARCH
- Citation
- NATURE COMMUNICATIONS, v.12, no.1
- Indexed
- SCIE
SCOPUS
- Journal Title
- NATURE COMMUNICATIONS
- Volume
- 12
- Number
- 1
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/128232
- DOI
- 10.1038/s41467-021-22523-3
- ISSN
- 2041-1723
- Abstract
- Layered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to the gliding of transition-metal layers upon Na+ extraction and insertion in the cathode materials. Here, we report that the large-sized K+ is riveted in the prismatic Na+ sites of P2-Na0.612K0.056MnO2 to enable more thermodynamically favorable Na+ vacancies. The Mn-O bonds are reinforced to reduce phase transition during charge and discharge. 0.901 Na+ per formula are reversibly extracted and inserted, in which only the two-phase transition of P2 <-> P'2 occurs at low voltages. It exhibits the highest specific capacity of 240.5 mAh g(-1) and energy density of 654 Wh kg(-1) based on the redox of Mn3+/Mn4+, and a capacity retention of 98.2% after 100 cycles. This investigation will shed lights on the tuneable chemical environments of transition-metal oxides for advanced cathode materials and promote the development of sodium-ion batteries. High-capacity and structural stable cathode materials are challenges for sodium-ion batteries. Here, the authors report a layered P2-Na0.612K0.056MnO2 with large-sized K+ riveted in the Na-layers to enable 0.9 Na+ (de)insertion with a reversible phase transition of P2-P'2.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Materials Science and Engineering > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.