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PNNL Lithium Hexafluorophosphate As An Additive To Enhance The Performance Of Lithium Batteries To Reduce.
Mar 07, 2017

According to the study of the North Pacific Pacific National Laboratory (PNNL), it has been shown that in the case of bis-trifluoromethylsulfonyl imide lithium-bis-oxalic acid lithium bis- (LiPF6, lithiumhexafluorophosphate), the lithium metal battery charging capacity and cycle stability will be greatly improved by adding a small amount (0.05M) of lithium hexafluorophosphate.


According to the study, the addition of the additive to the lithium metal battery, the 4V cathode at the appropriate high load (1.75mAhcm-2), 500 times after the cycle of its power retention capacity (capacityretention) is 97.1%, in the charge and discharge current density When 1.75mAhcm-2 is reached, the overpotential growth of the electrode is extremely limited. Researchers believe that rapid charging and cycling stability benefit from lithium metal surface solid electrolyte phase mask (solidelectrolyte) durable, good conductivity and AI cathode collector (cathodecurrentcollector).

The above diagram shows that PNNL will add lithium hexafluorophosphate to the double salt / carbonic acid solvent electrolyte. The cycling stability of the lithium metal battery will be improved, the charging speed will be increased, the voltage will be higher and the charging interval will be longer.