The invention discloses a preparation method of an in-situ cured
lithium battery and the in-situ cured
lithium battery, and relates to the technical field of
lithium batteries. A fluorinated
alkyl modified
polyamide monomer or fluorinated
alkyl modified polyacrylate
monomer which is relatively stable to water and
oxygen is added in a negative
electrode slurry mixing process, and a fluorinated
alkyl group is introduced, so that the
chemical stability of the
polymer is remarkably improved, and
hydrolysis or oxidation is not easy to occur when the fluorinated alkyl group is added in the negative
electrode slurry mixing process; and subsequently, a small amount of initiator is added into the
electrolyte for in-situ thermal
polymerization to form the semi-
solid electrolyte. Only a small amount of initiator is added into the
electrolyte, so that the problems that the
viscosity of the electrolyte is increased and the
conductivity is reduced due to the fact that the
monomer and the initiator are added into the electrolyte together during preparation of the electrolyte in a traditional scheme are solved; in addition, advanced
polymerization during transportation or long-term shelving can be avoided, so that the application efficiency and in-situ curing uniformity of the gel semi-
solid electrolyte are remarkably improved, and the high-temperature performance of the battery is also improved while the rate capability is not degraded.