Researchers from the Moscow State Institute of Steel and Alloys at the Russian National Research University of Technology, the Institute of Biochemical Physics of the Russian Academy of Sciences, and the Helmholtz Dresden Rosendorf Research Center in Germany have worked together to develop an alternative to lithium-ion batteries. Sodium battery. Due to the low price of sodium battery materials, it may become a new generation battery widely used in smart phones.
Lithium-ion battery is a kind of battery that people are very familiar with in daily life. It is widely used in portable electronic products such as smart phones and notebook computers. It is also well used in electric vehicles and aerospace industries. But lithium is a very expensive metal, and its storage in nature is limited.
The sodium reserves are abundant and the price is low. For many years, researchers around the world have been committed to developing a battery with higher capacity and lower price based on sodium materials to replace the current lithium-ion batteries and sodium batteries with high capacity. It has more commercial advantages than lithium-ion batteries.
Russian and German researchers found in experiments that if sodium atoms are "wrapped" in a special way, for example, like a sandwich, placing sodium atoms between two layers of graphene can greatly increase the sodium atoms. The electric capacity of the structure, and then developed a high-performance sodium battery.
According to Ilya Chepkasov, a researcher at the Moscow State Institute of Steel and Alloys, a lithium battery with a three-layer structure of lithium-ion and graphene has a capacity of 828 mAh per gram, which is a traditional graphite anode lithium battery (372 mAh per gram). An hour) more than twice. He said that at present, researchers have opened samples of three-layer sodium batteries and are testing them in the laboratory. Preliminary test results show that the capacity per gram of the new three-layer sodium-ion battery is equivalent to that of a traditional graphite anode lithium-ion battery. 335 mAh per gram.
In today's battery industry, lithium batteries are still the mainstream. But the biggest problem with lithium batteries is the limited storage of lithium in nature. One day, humans will need substitutes. The chemical properties of sodium and lithium are similar, but the reserves of sodium on the earth are very high. This advantage makes it stand out. However, the practical problem is that the unit mass of sodium batteries has less energy storage than lithium batteries. Therefore, researchers are working hard to improve sodium battery energy storage. At present, the industrialization of sodium batteries is still in its infancy, mostly in universities and research institutes. However, it is also the day for it to show its talents when it needs to be replaced.
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