On February 18th, according to foreign media reports, researchers at the University of California, San Diego developed an ultrasonic emission device that can be used not only for any battery, but also to make the commercial viability of lithium metal batteries one step closer. At present, lithium metal batteries are not an effective and feasible option, because whether in electric vehicles or electronic products, their life is too short. But the capacity of these batteries is indeed twice that of today's best lithium-ion batteries.
The device developed by the researchers is an integral part of the battery. By emitting ultrasonic waves, a circulating current is generated in the electrolyte liquid between the anode and the cathode, making lithium more likely to form uniform and dense deposits on the anode during the charging process. , So as to avoid the performance degradation and short circuit of lithium metal batteries.
The device is made of off-the-shelf smartphone components that can generate sound waves ranging from 100 million to 10 billion hertz. In mobile phones, these devices are mainly used to filter wireless cellular signals, as well as identify and filter voice calls and data. The researchers used them to generate current in the battery electrolyte.
Researchers have shown that the lithium metal battery equipped with the device can be charged and discharged 250 times, and the lithium ion battery can be charged and discharged more than 2,000 times within 10 minutes from zero charge to 100%.
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