Status and prospects of O3-type layered oxide cathodes for Na-ion batteries:stability,reversibility,and reaction mechanism
In recent years,sodium-ion batteries(SIBs)have attracted wide interest.Research on high-energy,highly reversible,low cost,and environmentally-friendly positive electrodes is crucial for the development of new generation of SIBs.O3-type layered oxide has unique advantages in energy density,operating voltage,and synthesis cost,and is currently the most concerned cathode material for SIBs.However,the development of the materials still meets some challenges such as irreversible structural phase transitions during charge/discharge cycles,high Na+diffusion barriers,and poor air stability.This article comprehensively overviews and evaluates the research status of O3-type layered materials from the aspects of material design,phase transition evolution,electrochemical reaction mechanisms and interfacial modification strategy,and the challenges faced in this field.
sodium-ion batterycathodelayered transition-metal oxideO3 type cathode
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