Research Status and Development Direction of Anode Materials for Sodium-ion Batteries

With the depletion of lithium resources, people gradually began to look for alternatives to lithium-ion batteries, and then sodium-ion batteries entered the public eye. In the past decade, sodium-ion batteries have developed at a high speed, establishing the beginning of the post-lithium era in the field of energy storage. This technology focuses on improving the performance of cathode and anode as well as electrolyte and optimising the preparation method of sodium-ion batteries. This paper mainly introduces the research status and development direction of anode materials for sodium-ion batteries. Firstly, the main structure of sodium-ion batteries is briefly introduced, and then it focuses on the electrochemical properties of several key anode materials such as carbon-based, titanium-based, organic-type and alloy-type anode materials, as well as the problems they face, and finally it takes the actual production and industrial application as a starting point to look ahead to the direction of the development of anode materials for sodium-ion batteries.