Preparation method of manganese dioxide/carbon material/conducting polymer composite material

A conductive polymer, manganese dioxide technology, applied in the direction of hybrid capacitor electrodes, etc., can solve problems such as poor cycle performance, and achieve the effect of improving rate characteristics and cycle performance

Inactive Publication Date: 2013-03-20
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nano-manganese dioxide is prone to agglomeration during the electrochemical cycle, which makes the cycle performance worse.

Method used

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  • Preparation method of manganese dioxide/carbon material/conducting polymer composite material
  • Preparation method of manganese dioxide/carbon material/conducting polymer composite material
  • Preparation method of manganese dioxide/carbon material/conducting polymer composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Under ice bath conditions, add 15g potassium permanganate to 130mL concentrated sulfuric acid and graphite mixture, then raise the temperature to 37°C for half an hour, then transfer to ice bath, slowly add 230mL deionized water dropwise, and then in 98°C React for 15 minutes, then add 700mL of 3% hydrogen peroxide and stir for 2 hours; graphite oxide can be obtained.

[0038] Disperse 0.47g of aniline monomer in 200mL of chloroform, place in an ice-water bath to cool to 0~5°C; dissolve 0.4g of potassium permanganate in 50mL of deionized water, and disperse 0.06g of graphite oxide in 150mL of deionized water, Add ammonia water to adjust pH=10, stir for three days and sonicate for 40 minutes at intervals to obtain a graphene oxide colloidal solution, both of which are cooled to 0~5°C in an ice-water bath, and then slowly add potassium permanganate dropwise to the graphite oxide dispersion , stirred mechanically for 1 hour, then carefully transferred the mixed solutio...

Embodiment 2

[0054] Disperse 0.47g of aniline monomer in 200mL of dichloromethane, place in an ice-water bath to cool to 0~5°C; dissolve 0.79g of potassium permanganate in 50mL of deionized water, and dissolve 0.06g of graphite oxide (the graphite oxide For the preparation, see Example 1) Disperse in 150mL deionized water, add ammonia water to adjust pH = 10, stir for three days and ultrasonically for 40min intervals to obtain a graphene oxide colloidal solution, both of which are cooled to 0~5°C in an ice-water bath , and then slowly add potassium permanganate dropwise to the graphite oxide dispersion, mechanically stir for 1 hour, then carefully transfer the mixture to the aniline dispersion to form a two-phase interface, stand in an ice-water bath for 24 hours, and the reaction is complete , the organic phase was carefully sucked out with a dropper and filtered, and the filter cake was washed and dried to obtain a graphene oxide-modified polyaniline / manganese dioxide ternary composite. ...

Embodiment 3

[0057] Disperse 1.86g of aniline monomer in 200mL of carbon tetrachloride, place in an ice-water bath to cool to 0~5°C; dissolve 3.16g of potassium permanganate in 50mL of deionized water, and dissolve 0.8g of graphite oxide (the Preparation of graphite, see Example 1) Disperse in 150mL deionized water, add ammonia water to adjust pH = 10, stir for three days and interval ultrasonic 40min to obtain graphene oxide colloidal solution, both are cooled to 0~5 in an ice water bath ℃, then slowly add potassium permanganate dropwise to the graphite oxide dispersion, mechanically stir for 2 hours, then carefully transfer the mixture to the aniline dispersion to form a two-phase interface, and stand in an ice-water bath for 72 hours to react. After completion, the organic phase was carefully sucked out with a dropper and filtered, and the filter cake was washed and dried to obtain a graphene oxide-modified polyaniline / manganese dioxide ternary composite.

[0058] 0.5 g of the obtained ...

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Abstract

The invention relates to a preparation method of a manganese dioxide/carbon material/conducting polymer composite material. The preparation method comprises the following steps: 1, water phase comprising an aqueous solution of potassium hypermanganate and a colloidal solution of a carbon material and organic phase formed by dispersing monomers of the conducting material in an organic solvent are subjected to the interfacial oxidative polymerization to obtain the manganese dioxide/carbon material/conducting polymer composite material; and 2, the manganese dioxide/carbon material/conducting polymer composite material obtained from step 1 is calcined with the existence of an inert gas to obtain the target composite material. The outstanding advantage of the preparation method is that, by subjecting the composite materials of the conductive materials, such as the manganese dioxide, the carbon material, and/or the conducting polymer, to the post-treatment of calcination, not only is the carbon material reduced, but also hydrate can be removed from the manganese dioxide to form a stable crystal structure, so that the electrochemical performance of the composite material is improved.

Description

technical field [0001] The invention relates to a method for preparing a manganese dioxide / carbon material / conductive polymer composite material, in particular to a method for preparing a graphene / manganese dioxide / polyaniline composite material used as an electrode material for a supercapacitor. Background technique [0002] Due to its low price, environmental friendliness, abundant resources and high theoretical specific capacitance (1370F g -1 ) characteristics, becoming a supercapacitor electrode material with broad application prospects. However, manganese dioxide has the defects of compact structure and poor conductivity, resulting in low specific capacitance and unsatisfactory electrochemical cycle performance, which limits the practical application of manganese dioxide. At present, these problems are mainly solved from two aspects: one is to increase its specific surface area and improve its utilization rate by preparing nanostructured manganese dioxide, so as to ac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L79/02C08G73/02C08K9/02C08K3/04C08K3/22H01G11/30
Inventor 王庚超王光祥汤千秋李星玮
Owner EAST CHINA UNIV OF SCI & TECH
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