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Preparation method for polymer/hollow sulfur composite electrode material

A technology of composite electrodes and metal composite materials, which is applied in the field of preparation of polymer/hollow sulfur composite electrode materials, can solve the problems of poor flexibility of metal particles, poor conductivity, and limited effect of sulfur cathode, and achieve simple process, convenient operation, effective Conducive to the effect of industrial production

Inactive Publication Date: 2015-11-04
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, compared with metals, the conductivity of conductive polymers is still poor, and compared with conductive polymers, networked metal particles are less flexible; the single use of conductive polymers or metals has limited effect on improving the performance of sulfur cathodes; sulfur cathodes The cycle performance and capacity still cannot meet the actual demand

Method used

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  • Preparation method for polymer/hollow sulfur composite electrode material

Examples

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Comparison scheme
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Embodiment 1

[0026] The composition of a polymer / hollow sulfur composite electrode material is designed as:

[0027] Copper, 15wt%; Sulfur element, mass fraction 80%; Polyaniline, mass fraction 5wt%;

[0028] A preparation method of a polymer / hollow sulfur composite electrode material: comprising the following steps:

[0029] 1) Weigh a certain amount of MCM-41 and copper acetate mixed with alcohol, stir well:

[0030] 2) The product of step 1 was stirred, heated to evaporate, dried, sintered at a high temperature at 500°C for 5 hours in an air atmosphere, and then reduced for 2 hours in a mixed atmosphere of argon and hydrogen at 400°C to obtain an MCM-41 / copper composite material;

[0031] 3) Mix the MCM-41 / copper composite material and elemental sulfur in a certain proportion, press into tablets, place in a closed container, heat to 400°C, and condense slowly to obtain the sulfur / MCM-41 / copper composite material;

[0032] 4) Weigh a certain mass of sulfur / MCM-41 / copper composite mixed...

Embodiment 2

[0036] The composition of a polymer / hollow sulfur composite electrode material is designed as:

[0037] Silver, 15wt%; Sulfur element, mass fraction 77%; Polypyrrole, mass fraction 8wt%;

[0038] A preparation method of a polymer / hollow sulfur composite electrode material: comprising the following steps:

[0039] 1) Weigh a certain mass of KIT-1 and silver acetate and mix it in acetone, stir well:

[0040] 2) The product of step 1 was stirred, heated to evaporate, dried, sintered at a high temperature of 700°C in an air atmosphere for 1 hour, and then reduced in an atmosphere of argon and hydrogen at 300°C for 4 hours to obtain a KIT-1 / silver composite material;

[0041] 3) Mix the KIT-1 / silver composite material and elemental sulfur in a certain proportion, press into tablets, place in a closed container, heat to 450°C, and slowly condense to obtain the sulfur / KIT-1 / silver composite material;

[0042] 4) Weigh a certain mass of sulfur / KIT-1 / silver composite mixed with alcoh...

Embodiment 3

[0046] The composition of a polymer / hollow sulfur composite electrode material is designed as:

[0047] Nickel, 10wt%; sulfur element, 80% by mass; polyacetylene, 10wt% by mass;

[0048] A preparation method of a polymer / hollow sulfur composite electrode material: comprising the following steps:

[0049] 1) Weigh a certain mass of SBA-15 and nickel acetate and mix it with ether, stir well:

[0050] 2) The product of step 1 was stirred, heated to evaporate, dried, sintered at 600°C in an air atmosphere for 2 hours at a high temperature, and then reduced in an atmosphere of argon and hydrogen at 500°C for 1 hour to obtain a SBA-15 / nickel composite material;

[0051] 3) Mix SBA-15 / nickel composite material and elemental sulfur in a certain proportion, press into tablets, place in a closed container, heat to 480°C, and slowly condense to obtain sulfur / SBA-15 / nickel composite material;

[0052] 4) Weigh a certain mass of sulfur / SBA-15 / nickel composite mixed alcohol aqueous solution...

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Abstract

The invention relates to a preparation method for a polymer / hollow sulfur composite electrode material. According to the method, the polymer / sulfur composite electrode material is obtained by taking a molecular sieve with high specific surface area as a carrier, depositing an organic salt, carrying out high-temperature sintering, reduction, sulfur deposition and polymerization and removing the molecular sieve, wherein the molecular sieve is one of SBA-15, MCM-41, KIT-1 and MSU-1; the organic salt is one of an organic copper salt, an organic silver salt, an organic iron salt and an organic nickel salt which can be dissolved in alcohol; the polymer is one of polyaniline, polypyrrole, polythiophene and polyacetylene; and sulfur accounts for 70-90 percent of the total mass of the polymer / hollow sulfur composite electrode material, the polymer accounts for 3-10 percent of the total mass of the polymer / hollow sulfur composite electrode material, and metal accounts for 7-20 percent of the total mass of the polymer / hollow sulfur composite electrode material. When used for the cathode of a lithium-sulfur battery, the polymer / hollow sulfur composite electrode material prepared according to the method has high specific capacity and excellent cycle performance, and has good application prospect in the battery field.

Description

technical field [0001] The invention relates to a preparation method of an electrode material, in particular to a preparation method of a polymer / hollow sulfur composite electrode material. Background technique [0002] Lithium-sulfur batteries have the advantages of high specific capacity and low cost, and are very promising energy storage batteries. The sulfur cathode material is one of the key factors restricting the promotion of lithium-sulfur batteries. The disadvantages of sulfur used in commercial batteries, such as poor conductivity and poor cycle performance, limit the popularization and application of lithium-sulfur batteries. Doping with conductive materials such as metals, carbon, or reducing the particle size of sulfur is an effective way to improve sulfur cathodes. Patent (a lithium-sulfur battery positive electrode composite material and its preparation method, 2014014334247) encapsulates elemental sulfur in conductive polymers to ensure the conductivity of ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/62H01M10/052
CPCH01M4/366H01M4/624H01M4/626H01M10/052Y02E60/10
Inventor 范美强陈海潮位攀陈达柴文详田光磊舒康颖
Owner CHINA JILIANG UNIV
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