US researchers design new material, which is expected to be used in the manufacture of LR03 battery

　　US researchers have designed a new material that is expected to be used in the manufacture of large-capacity lithium-ion batteries with stable performance, extending the battery life of smartphones, electric vehicles, etc. to more than twice the current time.

　　Northwestern University in the United States recently issued a press release saying that the new material is lithium magnesium oxide doped with chromium and vanadium elements. When used as the positive electrode of lithium-ion batteries, it can greatly increase the battery capacity, and the performance is stable and will not degrade rapidly.

　　Lithium-ion batteries usually use a compound of lithium, oxygen and a transition metal as the positive electrode. The transition metal is responsible for storing and releasing electrical energy, and its properties determine the battery capacity. Cobalt is currently commonly used. Previous studies have found that replacing cobalt with magnesium can increase capacity and reduce costs, but the battery performance degrades too quickly, and it drops significantly after two rounds of charge and discharge.

　　The Northwestern University research team published a paper in the American journal Science Advances, saying that they have established a detailed structural model of lithium magnesium oxide materials down to the individual atoms, analyzed the charge and discharge process, and found that the oxygen in it also participates in the storage of electrical energy, so the capacity is larger.

　　The researchers then tried to add different elements to lithium magnesium oxide, calculated the energy storage effect of various mixtures, and found that adding chromium and vanadium can achieve stable performance while maintaining a large battery capacity. Next, they will test the actual performance of the new material in the laboratory.

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