A kind of preparation method of sulfur composite cathode material and all-solid-state lithium-sulfur battery

A composite positive electrode material and lithium-sulfur battery technology, applied in the direction of lithium batteries, positive electrodes, battery electrodes, etc., can solve the problems of poor solid-solid contact, low charge and discharge capacity, poor cycle performance, etc., to achieve short preparation cycle, battery The effect of high specific capacity and low electrode impedance
CN111799459BActive Publication Date: 2021-09-17湖南恩捷前沿新材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
湖南恩捷前沿新材料科技有限公司
Publication Date
2021-09-17

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Abstract

The invention discloses a method for preparing a sulfur composite cathode material and an all-solid-state lithium-sulfur battery, wherein the method includes: mixing conductive carbon and a sulfide solid electrolyte by ball milling, and obtaining uniformly mixed conductor powder after sieving; In the high temperature zone of the vacuum tube furnace, the mixed conductor powder is placed in the low temperature zone of the vacuum tube furnace, and the sulfur vapor is evenly deposited in the churning mixed powder, and after cooling to normal temperature, the sulfur composite cathode material is obtained. The sulfur composite cathode material prepared by the present invention has a small particle size and a large specific surface area, and is in uniform and close contact with the mixed powder. The obtained all-solid-state lithium-sulfur battery has a small overall impedance, a high utilization rate of active materials, less capacity loss, and stable cycle performance. .
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Description

technical field

[0001] The invention belongs to the technical field of lithium-ion batteries, and in particular relates to a preparation method of a sulfur composite cathode material and an all-solid-state lithium-sulfur battery. Background technique

[0002] Among various battery technologies, lithium-ion batteries have the characteristics of high specific energy, high efficiency and long life, which make them stand out among many types of batteries and occupy the portable electronics market. The widely used traditional lithium-ion battery mainly uses liquid organic electrolyte, which has high ionic conductivity and good wettability, but its narrow temperature window greatly limits the application environment of the battery, and the narrow electrochemical stability window not only limits the battery The increase in energy density can also easily lead to various safety issues. Traditional lithium-ion batteries can no longer meet the increasing energy density and safety requ...

Claims

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