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Antifreeze liquefaction battery technology

2019-03-15 11:32:01 0

According to media reports, the anti-freeze lithium battery brought by researchers at the University of California, San Diego, allows electric vehicle users to safely drive electric cars at minus 60 °C.

battery|geb|lithium polymer

Among the traditional batteries, most of us see liquid electrolytes: they are safer and cheaper, and are suitable for most situations. But for scientists, the study of liquid electrolytes has reached its limit; many people have turned their attention to solid electrolytes.

However, Professor Prof. Shirley Meng and her research team did the opposite, using fluoromethane and difluoromethane liquefied gas to make electrolytes for lithium batteries and supercapacitors, and the operating temperatures of the two devices. Reduced to minus 60 ° C and minus 80 ° C. The papers of Professor Meng and his research group have been published in the journal Science.

The advantage of the "liquefied gas battery" is that the use of the new electrolyte also allows the battery to be equipped with an "automatic switch". The battery temperature is overheated, and the liquefied gas electrolyte "closes" the battery because it cannot precipitate ions. When the temperature drops, it can be "turned on" again. . In addition, it extends the life of traditional lithium batteries. The researchers said that the lithium metal reacted with the traditional electrolyte will form pinpoint-like protrusions on the surface of the electrode, forming a separation on the electrode, resulting in too little charge and discharge; while the new electrolyte and lithium metal react less, and will not form a similar Protrusion, thus extending battery life.


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