What is the sodium ion battery? Why could replace lithium battery?

Source: 2020 - 03 - 23 when clicks away: sodium ion batteries is what time? Why could replace lithium battery? What is sodium ion batteries, lithium-ion battery is more and more close to people's lives, but lithium resources on the earth is very limited, high mining cost. Developing a substitute for battery has become an important part of the scientists working hard to all over the world. Xia hui, a professor at nanjing university of science and technology, and team cooperation both at home and abroad, created the structure design and control methods, and important progress has been made in the study of manganese anode material as the foundation, the low cost of sodium ion battery instead of lithium ion batteries, the results reported in the latest issue of 'nature communications. Sodium ion batteries which are rich in sodium, sodium mining cost was only about 1% of lithium. Manganese acid sodium anode materials of layered structure has a large capacity of the theory, advantages of low cost, sources, become the focus in the sodium ion battery cathode materials. But as a result of the positive materials of the spacer layer manganese acid sodium salt is narrow, in the process of charging and discharging, when sodium layer between mobile a bigger radius, can be 'collapse' the structure of the anode material, become the key difficulties restrict sodium ion battery research and development. In addition to the layer spacing, influence of sodium ion batteries another important factor is the sodium ion content in the layered structure. Many researchers use various methods was prepared by different layers of manganese acid sodium, but its function index meets the requirement of practical application. 2. Why sodium lithium ion battery is expected to replace batteries havi professor team developed a structural design and control method, with researchers at the institute of physics, Chinese Academy of Sciences, and meng ying, professor at the university of California, San Diego. Layered structure in the water, sodium, manganese ore, on the basis of the distance between layers was successfully achieved, high sodium content of layered nanometer cathode material. The cathode material of electrode specific capacity for 211. 9 ma per gram, compared with lithium batteries currently in circulation about 140 ma per gram. In charge and discharge process, the anode material structure is stable, no phase change, volume change is only 2%. After 1000 times charging and discharging, the specific storage battery industry sustained rate is as high as 94. 6%, while the specific capacity of battery industry sustained rate of about 80%.