FIELD: electricity.
SUBSTANCE: membrane contains the first layer including a lithium-ion conducting compound having the functional group -SO3Li, the second layer including an inorganic oxide particle and a binder, and the third layer including a porous base material provided between the first layer and the second layer. Also, a lithium-sulfur battery, a battery module, a method for preparing a separating membrane and a method for preparing a lithium-sulfur battery are offered.
EFFECT: invention provides a separating membrane that can prevent leaching of lithium polysulphide in the lithium-sulfur battery cathode and suppress the growth of the lithium dendrites formed in the anode.
19 cl, 1 dwg, 1 tbl, 9 ex
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