This invention discloses an oil-based binder,
anode slurry, a composite
silicon anode, and an all-
solid-state battery, belonging to the technical field of all-
solid-state
battery energy storage materials. The oil-based binder comprises component A and component B; component A is a
copolymer composed of
acrylate, long-chain
ether oxygen bonds, and
epoxy active groups, while component B is a
styrene-
ethylene-
butene-
styrene block
copolymer. This binder is prepared through free
radical polymerization and physical blending, is soluble in weakly polar solvents, and is suitable for composite
silicon anode systems based on
sulfide solid electrolytes. The binder provided by this invention possesses excellent
ion conduction ability, mechanical properties, and
interfacial adhesion, effectively buffering the
volume expansion of the
silicon anode, maintaining
electrode structural stability and interfacial
ion transport, thereby significantly improving the rate performance and long-cycle stability of the all-solid-state battery.