The application provides a preparation method of a full-
solid-state
lithium battery electrolyte and an integrated battery for
energy storage, and belongs to the technical field of
lithium ion secondary batteries, and can at least partially solve the problems of insufficient comprehensive performance of
solid-state
electrolyte, large
solid-solid
interface impedance, poor cycle stability, poor high-
voltage adaptability and high
safety risk of existing full-solid-state
lithium batteries, and the application comprises the following steps: preparing a polydopamine
functionalized graphene oxide aqueous solution, preparing a lithiated polyionic liquid
ethanol aqueous solution, preparing a Co-N-C dispersion, preparing an
electrolyte film based on the above-mentioned solutions, then preparing a positive
electrode and a negative
electrode, sequentially stacking the positive
electrode, the
electrolyte film and the negative electrode, realizing close adhesion of the solid-solid interface through
hot pressing, performing gradient
heat curing treatment after
assembly, finally adopting aluminum
plastic film packaging to obtain an integrated battery. The integrated battery prepared in the application can effectively reduce the
interface impedance, improve the cycle stability and high-
voltage adaptability, reduce the
safety risk, and optimize the comprehensive performance.