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Carbon-sulphur composite material based on nano polyaniline array as well as preparation and application of composite material

A nano-polyaniline, composite material technology, applied in electrical components, electrochemical generators, battery electrodes and other directions, can solve the problems of difficult to obtain a composite material with a uniform structure, a small amount of active material adsorption, and a low structural regularity. The effect of improving capacity and cycle performance, simple equipment, and obvious suppression effect

Inactive Publication Date: 2014-12-24
NANJING ZHONGCHU NEW ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, graphene has a common disadvantage of nanomaterials—easy agglomeration, which greatly reduces its surface area as an electrode material, which not only makes it difficult for the electrolyte to fully contact the surface of graphene, but also has less adsorption of active substances. , low utilization
However, polyaniline synthesized by traditional chemical methods usually has a disordered aggregate structure, low structural regularity, small surface area, and low electrical conductivity.
Combining the two is difficult to obtain a composite material with uniform structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Step 1, the preparation of sulfonated graphene

[0060] By the ratio of 0.01g graphene oxide / ml aqueous solution, graphene oxide is added in the aqueous solution that pH is 9~10, ultrasonic dispersion is uniform, and low-speed centrifugation removes precipitation, makes graphene oxide colloidal solution; According to sodium borohydride: Add sodium borohydride to the graphene oxide colloidal solution with a mass ratio of graphene oxide of 3:1, stir and react at 80°C for 2 hours, remove most of the oxygen-containing groups in graphene oxide, and prepare partially reduced graphite oxide Graphene oxide; the graphene oxide of above-mentioned partial reduction is mixed with p-aminobenzenesulfonic acid diazonium salt to react 2.5h in ice-water bath, the graphene oxide of control partial reduction: the mass ratio of p-aminobenzenesulfonic acid diazonium salt is 1: 1.5. Introduce sulfonic acid groups to the surface of graphene oxide; react the above sulfonated product with hydra...

Embodiment 2

[0068] In step 3, the sulfonated graphene-supported nano-polyaniline array and elemental sulfur are mixed in a mass ratio of 3:7, and the others are the same as in Example 1.

[0069] In the prepared carbon-sulfur composite material based on nano-polyaniline arrays, the content of sulfonated graphene-loaded nano-polyaniline arrays is 30wt%, and the content of elemental sulfur is 70wt%.

Embodiment 3

[0071] In step 3, the sulfonated graphene-supported nano-polyaniline array and elemental sulfur are mixed at a mass ratio of 1:1, and the others are the same as in Example 1.

[0072] In the prepared carbon-sulfur composite material based on nano-polyaniline arrays, the content of sulfonated graphene-loaded nano-polyaniline arrays is 50 wt%, and the content of elemental sulfur is 50 wt%. Others are the same as embodiment 1.

[0073] The carbon-sulfur composite material based on the nano-polyaniline array prepared in Example 1, 2, 3, and the binder PVDF are mixed in proportion (7:1) to make an active material slurry coated on a 0.6mm thick nickel foam substrate , dried and rolled to 0.33mm and cut into 40mm wide × 15mm long pole pieces, and 0.16mm thick glass fiber non-woven separator and aluminum sheet as the negative electrode active material were wound into batteries and loaded into the plated The nickel steel shell is filled with aluminum chloride-triethylamine hydrochlori...

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PUM

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Abstract

The invention discloses a carbon-sulphur composite material based on a nano polyaniline array as well as preparation and application of the composite material, and also discloses a secondary aluminium cell taking the composite material as a positive electrode active material. A preparation method of the carbon-sulphur composite material is simple, and the composite material has high electric conductivity, high capacity of adsorbing sulphur and obvious effect of inhibiting sulphur; a positive electrode prepared from the composite material is high in electric conductivity and sulphur utilization ratio; the secondary aluminium cell adopting the positive electrode prepared from the composite material is simple in preparing process, high in capacity and excellent in circulating performance.

Description

technical field [0001] The invention belongs to the field of battery materials and new energy products, and relates to a positive electrode composite material, especially a carbon-sulfur composite material based on a nano-polyaniline array and a preparation method thereof, and a secondary aluminum using the composite material as a positive electrode active material Battery. Background technique [0002] With the rapid development of new power sources such as electronic and communication equipment, electric vehicles, wind power and photovoltaic power generation, human beings have higher and higher demands on battery performance for supporting power sources, and there is an urgent need to develop power batteries and energy storage batteries. The secondary aluminum-sulfur battery is one of the ideal battery systems to meet these demands. [0003] Compared with existing electrode materials, aluminum, the metal element with the largest reserves in the earth's crust, has the adva...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/62H01M10/054
CPCH01M4/362H01M4/364H01M4/38H01M4/602H01M4/624H01M10/054H01M2004/021Y02E60/10
Inventor 赵宇光骆建洲
Owner NANJING ZHONGCHU NEW ENERGY