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A kind of preparation method of the modified diaphragm of lithium-sulfur battery

A lithium-sulfur battery and separator technology, which is applied in the field of preparation of modified separators, can solve problems such as undiscovered, and achieve the effects of simple operation, suppression of shuttle effect and simple process.

Active Publication Date: 2020-10-27
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After searching, no information about the preparation of Cr from chrome skin was found. 2 o 3 Report on / C Complex and Its Specific Application

Method used

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  • A kind of preparation method of the modified diaphragm of lithium-sulfur battery

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Embodiment 1

[0028] (1) Pretreatment step: Naturally dry the waste chrome skin from tanning, crush it to about 0.5cm×0.5cm, heat it on an electric furnace to remove grease until no smoke is generated, and obtain the chrome skin pretreatment product.

[0029] (2) Carbonization step: place the chrome skin pretreatment product in a tube electric furnace, 2 Under protection, pre-carbonize at 500°C for 1h, and then heat up to 750°C for 1h to obtain Cr 2 o 3 / C complex.

[0030] (3) Preparation of modified diaphragm: acetylene black, Cr 2 o 3 / C compound and gelatin are mixed according to the ratio of 7:2:1, ball milled in a planetary ball mill, the obtained slurry is coated on the diaphragm, and after drying, a modified diaphragm is obtained, and the diaphragm is cut into a diameter of 19 mm with a tablet press machine. mm discs are available for use.

[0031] (4) Lithium-sulfur battery assembly: The modified diaphragm was applied to the lithium-sulfur battery system, and assembled into a ...

Embodiment 2

[0034] (1) Pretreatment step: Naturally dry the waste chrome skin from tanning, crush it to about 0.5cm×0.5cm, heat it on an electric furnace to remove grease until no smoke is generated, and obtain the chrome skin pretreatment product.

[0035] (2) Carbonization step: place the chrome skin pretreatment product in a tube electric furnace, 2 Under protection, pre-carbonize at 500°C for 1h, and then heat up to 750°C for 1h to obtain Cr 2 o 3 / C complex.

[0036] (3) Preparation of modified diaphragm: acetylene black, Cr 2 o 3 / C compound and gelatin are mixed according to the ratio of 5:4:1, ball milled in a planetary ball mill, the obtained slurry is coated on the diaphragm, and after drying, a modified diaphragm is obtained, and the diaphragm is cut into a diameter of 19 mm with a tablet press. mm discs are available for use.

[0037] (4) Lithium-sulfur battery assembly: The modified diaphragm was applied to the lithium-sulfur battery system, and assembled into a CR2025 b...

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Abstract

The present invention relates to a kind of Cr with chrome skin as raw material 2 o 3 / C compound and its preparation method and application, using tanning waste chrome skin as raw material, utilizing the abundant biomass carbon source and transition metal oxide resources in tanning waste, carbonizing chrome skin to produce Cr 2 o 3 / C complex. Transition metal oxide Cr 2 o 3 As a polar substance, Cr 2 o 3 Composite with C to exert physical adsorption of carbon materials and Cr 2 o 3 It can be used in the positive electrode or diaphragm of lithium-sulfur batteries to exert the adsorption effect on polysulfides, thereby inhibiting the shuttle effect and improving the performance of lithium-sulfur batteries.

Description

technical field [0001] The invention belongs to the field of battery materials, and in particular relates to a preparation method of a modified diaphragm of a lithium-sulfur battery. Background technique [0002] In energy storage systems, lithium-ion batteries have the advantages of light weight, high energy density, high working voltage, no memory effect, long cycle life, and low pollution, and are currently the first choice for various energy storage systems. After development, the performance of the positive and negative electrode materials of lithium-ion batteries has approached the theoretical limit, and it is difficult to increase the total capacity of the battery system, and it is difficult to meet the higher requirements of the society and consumers for energy storage systems. A lithium-sulfur battery that uses elemental sulfur as the positive electrode active material and metal lithium as the anode, when the elemental sulfur completely reacts to form Li 2 When S, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/48H01M10/052H01M2/14H01M2/16H01M50/403H01M50/431
CPCH01M4/362H01M4/48H01M4/583H01M4/625H01M10/052H01M50/431H01M50/403Y02E60/10
Inventor 黄雅钦李承明关越鹏于帆艾飞邵洪源
Owner BEIJING UNIV OF CHEM TECH