Polyacrylonitrile-sulphur composite having increased capacity
AssigneeRobert Bosch GmbH
InventorsJoerg Thielen, Marcus Wegner
Life of this patent
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Abstract
A method of producing a cross-linked polyacrylonitrile-sulfur composite material, in which polyacrylonitrile is reacted with sulfur and at least one cross-linking agent to form a cross-linked polyacrylonitrile-sulfur composite material and the cross-linking agent includes at least one functional group, selected independently of one another from an ethylenically unsaturated functional group, an epoxy group and a thiirane group. In addition, the invention relates to a polyacrylonitrile-sulfur composite material, a cathode material, an alkali metal-sulfur cell or an alkali metal-sulfur battery as well as to an energy store.
Claims27
A polyacrylonitrile-sulfur composite material, comprising:
- cyclized polyacrylonitrile;
- sulfur;
- and
- at least one cross-linking agent, wherein the polyacrylonitrile-sulfur composite material is formed by a reaction between the polyacrylonitrile, the sulfur, and the at least one cross-linking agent, and wherein the cross-linking agent, prior to the reaction, includes a functional group selected from an ethylenically unsaturated functional group, an epoxy group, and a thiirane group.
A polyacrylonitrile-sulfur composite material, comprising:
- 35 to 75% by weight, relative to the total weight of the material, of covalently bonded sulfur;
- 0.01 to 15% by weight, relative to the total weight of the material, of a non-sulfur cross-linking agent, which is bonded to the sulfur;
- 10 to 64.99% by weight, relative to the total weight of the material, of cyclized polyacrylonitrile to which the sulfur is covalently bonded;
- and
- 0 to 10% by weight, relative to the total weight of the material, of additives, selected from viscosity modifiers and catalysts.
A method comprising:
- producing a cross-linked polyacrylonitrile-sulfur composite material, wherein the producing comprises reacting polyacrylonitrile with sulfur and at least one cross-linking agent to form a cross-linked polyacrylonitrile-sulfur composite material, the cross-linking agent including a functional group selected from an ethylenically unsaturated functional group, an epoxy group, and a thiirane group.
A polyacrylonitrile-sulfur composite material, produced by reacting polyacrylonitrile with sulfur and at least one cross-linking agent to form a cross-linked polyacrylonitrile-sulfur composite material, the cross-linking agent including a functional group selected from an ethylenically unsaturated functional group, an epoxy group, and a thiirane group.
A cathode material for a lithium-sulfur cell, comprising:
- a polyacrylonitrile-sulfur composite material (a) including a cyclized polyacrylonitrile, sulfur, and at least one cross-linking agent formed by a reaction between the polyacrylonitrile, the sulfur, and the at least one cross-linking agent, wherein the at least one cross-linking agent, prior to the reaction, includes a functional group selected from an ethylenically unsaturated functional group, an epoxy group, and a thiirane group.
A lithium-sulfur cell, comprising:
- a lithium-containing anode;
- and
- a cathode, the cathode including a cathode material including a polyacrylonitrile-sulfur composite material, the polyacrylonitrile-sulfur composite material including a cyclized polyacrylonitrile, sulfur, and at least one cross-linking agent formed by a reaction between the polyacrylonitrile, the sulfur, and the at least one cross-linking agent, wherein the at least one cross-linking agent, prior to the reaction, includes a functional group selected from an ethylenically unsaturated functional group, an epoxy group, and a thiirane group.
Dependencies are inferred from the claim text.