This invention provides an in-situ
solid-state battery and its preparation method, comprising a
battery cell and an in-situ solidified
electrolyte precursor injected into the
battery cell. The in-situ solidified
electrolyte precursor is formulated according to the following
mass percentages: 1-30 wt.% polymeric
monomer, 0.1-1 wt.% initiator, 10-20 wt.%
lithium salt, 0.1-10 wt.%
redox shuttle, and the balance being an
organic solvent. This invention utilizes the
redox shuttle to react within the battery, converting electrical energy into heat, thereby uniformly heating the battery interior and solidifying the gel
electrolyte in situ. This method provides more uniform heating and a more uniform
polymerization effect, resulting in a more uniform and stable battery interface and higher cycle stability, thus producing a high-performance
solid-state battery. Furthermore, this method is applicable to most polymeric monomers and achieves uniform heating within the battery without adding additional equipment.