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AssigneeNanotek Instruments, Inc.
InventorsAruna Zhamu, Bor Z. Jang
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Provided is a rechargeable alkali metal-sulfur cell comprising an anode active material layer, an electrolyte, and a cathode active material layer containing multiple particulates of a sulfur-containing material selected from a sulfur-carbon hybrid, sulfur-graphite hybrid, sulfur-graphene hybrid, conducting polymer-sulfur hybrid, metal sulfide, sulfur compound, or a combination thereof and wherein at least one of the particulates is composed of one or a plurality of sulfur-containing material particles being embraced or encapsulated by a thin layer of a high-elasticity ultra-high molecular weight polymer having a recoverable tensile strain no less than 2%, a lithium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm This battery exhibits an excellent combination of high sulfur content, high sulfur utilization efficiency, high energy density, and long cycle life.
A rechargeable alkali metal-sulfur cell selected from lithium-sulfur cell, sodium-sulfur cell, or potassium-sulfur cell, said alkali metal-sulfur cell comprising:
A cathode active material layer for a rechargeable alkali metal-sulfur cell, wherein said cathode active material layer contains multiple particulates of a sulfur-containing material selected from a sulfur-carbon hybrid, sulfur-graphite hybrid, sulfur-graphene hybrid, conducting polymer-sulfur hybrid, metal sulfide, sulfur compound, or a combination thereof and wherein at least one of said particulates is composed of one or a plurality of sulfur-containing material particles being fully embraced or encapsulated by a thin layer of a high-elasticity polymer having a recoverable tensile strain no less than 2%, a lithium ion or sodium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm, wherein said high-elasticity polymer contains an ultrahigh molecular weight polymer having a molecular weight from 0.5×106 to 9×106 g/mole.
A cathode active material layer for a rechargeable alkali metal-sulfur cell, wherein said cathode active material layer contains a resin binder, an optional conductive additive, and multiple particles of a sulfur-containing material selected from a sulfur-carbon hybrid, sulfur-graphite hybrid, sulfur-graphene hybrid, conducting polymer-sulfur hybrid, metal sulfide, sulfur compound, or a combination thereof, wherein said sulfur-containing material particles are bonded by said resin binder to form an integral solid layer, and wherein said integral solid layer is covered and protected by a thin layer of a high-elasticity polymer having a recoverable tensile strain no less than 2%, a lithium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm, wherein said high-elasticity polymer contains an ultrahigh molecular weight polymer having a molecular weight from 0.5×106 to 9×106 g/mole.
A powder mass for a lithium-sulfur battery cathode, said powder mass comprising multiple particulates of a sulfur-containing material selected from a sulfur-carbon hybrid, sulfur-graphite hybrid, sulfur-graphene hybrid, conducting polymer-sulfur hybrid, metal sulfide, sulfur compound, or a combination thereof and wherein at least one of said particulates is composed of one or a plurality of sulfur-containing material particles being embraced or encapsulated by a thin layer of a high-elasticity polymer having a recoverable tensile strain no less than 2%, a lithium ion conductivity no less than 10−6 S/cm at room temperature, and a thickness from 0.5 nm to 10 μm, wherein said high-elasticity polymer contains an ultrahigh molecular weight polymer having a molecular weight from 0.5×106 to 9×106 g/mole.
A method of manufacturing a rechargeable alkali metal-sulfur cell selected from lithium-sulfur cell, sodium-sulfur cell, or potassium-sulfur cell, said method comprising:
Dependencies are inferred from the claim text.