Affiliation:
1. College of Chemistry and Chemical Engineering, Central South University Changsha the People's Republic of China
2. Institute for Carbon Neutralization, College of Chemistry and Materials Engineering, Wenzhou University Wenzhou the People's Republic of China
3. College of Agronomy, School of Chemistry and Materials Science, Hunan Agricultural University Changsha the People's Republic of China
4. Wenzhou Key Laboratory of Sodium‐Ion Batteries, Wenzhou University Technology Innovation Institute for Carbon Neutralization Wenzhou the People's Republic of China
5. College of Electrical and Information Engineering, Hunan University Changsha the People's Republic of China
6. Hunan Province Yin Feng New Energy Co. Ltd Changsha the People's Republic of China
Abstract
AbstractSodium‐ion batteries (SIBs) are considered as a low‐cost complementary or alternative system to prestigious lithium‐ion batteries (LIBs) because of their similar working principle to LIBs, cost‐effectiveness, and sustainable availability of 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 for their relatively large specific capacity, high operating potential, facile synthesis, and environmental benignity. However, there are a series of fatal issues in terms of poor air stability, unstable cathode/electrolyte interphase, and irreversible phase transition that lead to unsatisfactory battery performance from the perspective of preparation to application, outside to inside of layered oxide cathodes, which severely limit their practical application. This work is meant to review these critical problems associated with layered oxide cathodes to understand their fundamental roots and degradation mechanisms, and to provide a comprehensive summary of mainstream modification strategies including chemical substitution, surface modification, structure modulation, and so forth, concentrating on how to improve air stability, reduce interfacial side reaction, and suppress phase transition for realizing high structural reversibility, fast Na+ kinetics, and superior comprehensive electrochemical performance. The advantages and disadvantages of different strategies are discussed, and insights into future challenges and opportunities for layered oxide cathodes are also presented.image
Funder
National Natural Science Foundation of China
Natural Science Foundation of Zhejiang Province
State Key Laboratory of Electrical Insulation and Power Equipment
Subject
Materials Chemistry,Surfaces, Coatings and Films,Materials Science (miscellaneous),Electronic, Optical and Magnetic Materials
Cited by
17 articles.
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