Study on the High-Voltage Resistance of Layered Oxide Cathode Materials for Sodium-Ion Batteries
Sodium-ion batteries have shown great application prospects in the field of large-scale energy storage and low-speed electric vehicles due to their resource and cost advantages.Among various cathodes reported,layered oxide cathode materials have been widely investigated owing to their high theoretical capacity and simple synthesis method.However,many adverse reactions and phenomena such as structural instability and surface degeneration are prone to occur during its cycling process,especially at high voltage,which hinders its application in commerce.This article briefly reviews the mechanism of structural transformation,surface degradation,and oxygen loss of layered oxide cathode at high-voltage,focuses on the strategies to improve the high-voltage resistance of layered oxide cathode,and aims to provide reasonable insights for improving the high-voltage stabilization of layered oxide cathode materials and designing sodium-ion layered oxide cathode materials with high performance.Finally,the shortcomings of sodium-ion battery layered oxide cathode materials in modification and future research directions are also summarized.
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维普
