Layered oxide cathodes for sodium‐ion batteries: From air stability, interface chemistry to phase transition

• DOI: 10.1002/inf2.12422
• Publication Date: 2023-05-08T23:45:28Z
• Authors: Yi‐Feng Liu; Kai Han; Dan‐Ni Peng; Ling‐Yi Kong; Yu Su; Hong‐Wei Li; Hai‐Yan Hu; Jia‐Yang Li; Hong‐Rui Wang; Zhi‐Qiang Fu; Qiang Ma; Yan‐Fang Zhu; Rui‐Ren Tang; Shu‐Lei Chou; Yao Xiao; Xiong‐Wei Wu
• Keywords: sodium‐ion batteries; layered oxide cathodes; air stability; phase transition; TA401-492; Information technology; interface chemistry; T58.5-58.64; Materials of engineering and construction. Mechanics of materials; 01 natural sciences; 0104 chemical sciences

Abstract Sodium‐ion batteries (SIBs) are considered as a low‐cost complementary or alternative system to prestigious lithium‐ion (LIBs) because of their similar working principle LIBs, cost‐effectiveness, and sustainable availability sodium resources, especially in large‐scale energy storage systems (EESs). Among various cathode candidates for SIBs, Na‐based layered transition metal oxides have received extensive attention relatively large specific capacity, high operating potential, facile synthesis, environmental benignity. However, there series fatal issues terms poor air stability, unstable cathode/electrolyte interphase, irreversible phase that lead unsatisfactory battery performance from the perspective preparation application, outside inside oxide cathodes, which severely limit practical application. This work is meant review these critical problems associated with cathodes understand fundamental roots degradation mechanisms, provide comprehensive summary mainstream modification strategies including chemical substitution, surface modification, structure modulation, so forth, concentrating on how improve reduce interfacial side reaction, suppress realizing structural reversibility, fast Na + kinetics, superior electrochemical performance. The advantages disadvantages different discussed, insights into future challenges opportunities also presented. image