The research and industrialization progress and prospects of sodium ion battery

With the widespread use of electric vehicles and large-scale energy storage applications, lithium-ion batteries will face the problem of resource shortage. As a new type of secondary chemical power source, sodium ion battery has the advantages of abundant resources, low cost, high energy conversion efficiency, long cycle life, high safety, excellent high and low temperature performance, high rate charge and discharge performance, and low maintenance cost. It is expected to complement lithium-ion batteries in the field of large-scale electrochemical energy storage and low-speed electric vehicles [1]. At present, the industrialization of sodium ion battery has started at home and abroad. Sodium ion batteries have already had the market conditions and technical conditions for large-scale industrialization. This paper summarizes the structure of sodium ion batteries, materials, battery assembly and processing, and cost evaluation. The bottlenecks in the development of sodium ion batteries and meaningful future research directions are summarized and personal insights are provided.