One kind of magnification lithium ion battery and a lithium ion battery electrolyte

The present invention discloses a magnification of lithium ion battery electrolyte of lithium hexafluorophosphate LiPF6, lithium bis (oxalato) borate, LiBOB mixed solvent consisting of a mixed solvent of ethylene carbonate EC, ethyl methyl carbonate, EMC, and diethyl carbonate DEC-fluoro ethylene carbonate FEC components. Electrolyte of the invention to improve the conductivity of the electrolyte ion conductivity that is significantly improved manner magnification performance of the electrolyte. Electrolyte of the invention has the following advantages: the electrolytic solution at 25 ℃ ambient, a relatively high conductivity can be achieved 10.5-11.8ms / cm; 1C discharge capacity higher than the capacity g can be achieved 130-150mAh / g. 5Ah pouch using 1C discharge capacity of the lithium ion battery of the present invention to provide an electrolytic solution obtained was 6097mAh. At 25 ℃ ambient medium, 12C discharge capacity was 5975mAh, was 98.01% 1C discharge capacity.