With the rapid development of portable electronic devices and new energy electric vehicles, the production and manufacturing of lithium-ion batteries has reached an unprecedented scale, and major lithium battery manufacturers are constantly expanding their production capacity, which will inevitably lead to massive consumption of lithium resources and rising prices.In fact, lithium is not an abundant resource. The content in the earth's crust is only 0.0065%, and lithium resources are unevenly distributed. 70% of lithium is distributed in South America.If the current development rate of lithium batteries is followed and recycling is not considered for the time being, the application of lithium batteries will be severely limited by lithium resources in a few decades. If lithium batteries are applied to the energy storage market, this process will definitely be accelerated. In addition, the rising price of lithium is not conducive to its practical application in large-scale energy storage.Sodium, which is in the same main group as lithium and has similar physical and chemical properties, is very abundant. Its abundance in the earth's crust ranks sixth. What's more important is that sodium is distributed all over the world and is not restricted by resources or regions. Therefore, Sodium-ion batteries have great resource advantages compared to lithium-ion batteries.On the other hand, sodium-ion batteries have great potential price advantages due to the low price of sodium, and are very suitable for applications in fields such as low-speed electric vehicles and large-scale energy storage.