PNNL Uses LiPF6 As Additive To Improve The Performance Of Lithium Battery

- Mar 08, 2017-

According to the Pacific Northwest National Laboratory (Pacific Northwest National Laboratory, PNNL) the study showed that in the double three trifluoromethyl sulfonyl imide lithium bis oxalate lithium borate / carbonate electrolyte solvent double base (LiTFSI-LiBOB dual-salt/carbonate-solvent-based electrolytes) adding a small amount of (0.05M) six fluorine lithium phosphate (LiPF6, lithium, hexafluorophosphate), lithium metal the battery charging capacity and cycle stability will be significantly improved.          


According to the study, add the additive to the lithium metal battery after applying moderate high load of 4V at the cathode (1.75 mAh cm-2), the ability to maintain its power after 500 cycles (capacity retention) 97.1%, put in charge and current density reached 1.75 mAh cm-2, the electrode overpotential growth is very limited. Researchers believe that fast charging and cycling stability due to the lithium metal surface of the solid electrolyte interphase (solid electrolyte) durable, good conductivity and AI cathode collector (cathode current collector).          


The researchers tried six lithium fluoride salt would have been used in lithium ion batteries (LiPF6, lithium, hexafluorophosphate) added to the fast charging of electrolyte, configured as a new electrolyte, but also uses a lithium anode and lithium nickel manganese cobalt oxide, and a fast, efficient, high voltage battery was born the.