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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  • Abstract
  • Description
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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 o

Method used

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  • Preparation method for polymer/hollow sulfur composite electrode material

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[0025] Example 1

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

[0027] Copper, 15wt%; elemental sulfur, 80% by mass; polyaniline, 5wt%;

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

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

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

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

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

Example Embodiment

[0035] Example 2

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

[0037] Silver, 15wt%; sulfur element, mass fraction 77%; polypyrrole, mass fraction 8wt%;

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

[0039] 1) Weigh a certain mass of KIT-1 and silver acetate, mix them with acetone, and stir evenly:

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

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

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

Example Embodiment

[0045] Example 3

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

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

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

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

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

[0051] 3) Mix SBA-15 / nickel composite material and elemental sulfur in a certain ratio, press 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 material mixed with alcohol a...

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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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