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Title: Oxygen redox chemistry: A new approach to high energy density world

Journal Article · · Next Materials

Sodium-ion batteries (SIBs) have been considered as promising candidates for large scale energy storage systems due to the great abundance of sodium resources. For sodium layered transition metal oxide cathode materials, oxygen redox can increase the energy density by enabling extra capacity and delivering high voltage. Here we provide a comprehensive overview of oxygen redox in SIBs from the perspectives of mechanism, challenges, and solutions. The previous studies on voltage hysteresis, capacity decay and oxygen release induced by oxygen redox as well as the effectiveness of different strategies including superlattice engineering, elemental substitution, and surface modification on the electrochemical performances of cathode materials with oxygen redox are comprehensively summarized with typical examples. Finally, the remaining challenges and the future research direction are discussed.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO); National Natural Science Foundation of China (NSFC); Shanghai Pujiang Program
Grant/Contract Number:
SC0012704; 22209106
OSTI ID:
2267551
Report Number(s):
BNL-225116-2023-JAAM
Journal Information:
Next Materials, Vol. 2; ISSN 2949-8228
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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