| abstract |
The invention discloses a preparation method of a fluorine-containing electrolyte. The fluorine-containing electrolyte mainly contains two fluorine-containing compounds. The first fluorine-containing compound contains a fluoromethyl olefinic carbonate structure, and the compound of this structure can improve the The flash point of the electrolyte helps to improve the safety performance of the electrolyte. The carbon-oxygen bond of the ring structure in the second fluorine-containing compound structural formula will break itself at high temperature, and participate in the formation of the SEI film on the positive electrode and the negative electrode, so that the high temperature performance of the lithium battery can be improved. |