The invention discloses a gel
polymer binder for a
lithium sulfur battery electrode material and a preparation method thereof. The preparation method comprises the following steps: (1) weighing 1,3-dichloro-2-
propanol and
polyethylene glycol, uniformly mixing, introducing N2 to deoxygenize, adjusting temperature, keeping constant temperature, adding a catalyst to accelerate a
polymerization reaction, extracting a target product 1,3-dichloro-2-propyl
alcohol polyethylene glycol
ether, and then adjusting the pH value of the solution with an alkaline solution; (2) weighing a sulfosalt, completely dissolving the sulfosalt in
distilled water, adjusting temperature, keeping constant temperature, and adding elemental
sulfur to prepare a
polysulfide salt; (3) mixing a product 1,3-dichloro-2-propyl
alcohol polyethylene glycol
ether in the step (1) and a product
polysulfide salt in the step (2), adjusting temperature, keeping constant temperature, taking out a gel-like substance, and rotatably evaporating at a certain temperature to obtain a gel
polymer binder for a
lithium sulfur battery. The gel
polymer binder prepared by the invention has the characteristics of easiness in operation, good bonding effect, high
electrode active material
utilization rate, good battery rate capability and the like.