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Method for fast preparing conductive carbon/manganese dioxide composite electrode material

A manganese dioxide electrode and conductive carbon technology, which is applied in hybrid capacitor electrodes, electrolytic capacitors, circuits, etc., can solve the problems of difficult control of manganese dioxide size and crystal structure, and achieve easy commercialization and large-scale production. The effect of low resistance and low cost

Inactive Publication Date: 2009-12-09
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the usual carbon / manganese dioxide composites are prepared by oxidizing divalent manganese salts at room temperature or under conventional heating conditions, or by mixing divalent manganese salts with permanganate, or reducing them with ethanol or hydrogen ions. Preparation of potassium permanganate, the size and crystal structure of manganese dioxide are difficult to control

Method used

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  • Method for fast preparing conductive carbon/manganese dioxide composite electrode material
  • Method for fast preparing conductive carbon/manganese dioxide composite electrode material
  • Method for fast preparing conductive carbon/manganese dioxide composite electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (A) Preparation of conductive carbon / manganese dioxide electrode material

[0024] Add 0.1g of carbon nanotubes to 100mL of distilled water, ultrasonic for 1 hour; weigh 10g of KMnO 4 , added to the above mixture, stirred to fully dissolve; then placed in a microwave heating device with a power of 1000W and heated for 1min; the obtained precipitate was fully washed and dried at 60°C for 48h to obtain a conductive carbon / manganese dioxide electrical composite pole material.

[0025] (B) Electrode preparation and performance testing

[0026] Mix the following ingredients into a paste: conductive carbon / manganese dioxide electrode electrode material 80wt%, conductive carbon black 10wt%, polytetrafluoroethylene (PTFE) 5wt%, distilled water 5wt%. Fully mix the carbon nanotube / manganese dioxide electrode material and conductive carbon black by mechanical oscillation, add distilled water and PTFE emulsion in turn, and make it uniform by mechanical stirring. Nickel platinum,...

Embodiment 2

[0028] Add 0.5g of carbon nanotubes and 0.5g of nano-graphite sheets to 10mL of distilled water, and sonicate for 10 hours; weigh 0.1g of KMnO 4 , added to the above mixture, stirred to fully dissolve; then placed in a microwave heating device with a power of 400W and heated for 30 minutes; the obtained precipitate was fully washed and dried at 150°C for 2 hours to obtain a conductive carbon / manganese dioxide electrical composite pole material. The preparation and testing methods of the electrodes are the same as in Example 1, and the measured results are listed in Table 1.

Embodiment 3

[0030] Add 0.1g nano-graphite flakes to 50mL distilled water, ultrasonic for 5 hours; weigh 1g KMnO 4 , added to the above mixture, stirred to fully dissolve; then placed in a microwave heating device with a power of 600W and heated for 10 minutes; the obtained precipitate was fully washed and dried at 100°C for 6 hours to obtain a conductive carbon / manganese dioxide electrical composite pole material. The preparation and testing methods of the electrodes are the same as in Example 1, and the measured results are listed in Table 1.

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Abstract

The invention relates to a method for fast preparing a conductive carbon / manganese dioxide electrode material, comprising the following concrete steps that: (1), a conductive carbon material is added into distilled water, and the dispersion liquid of the conductive carbon material is prepared by ultrasonic dispersion; (2), potassium permanganate is added into the dispersion liquid obtained by the step (1), and the mixture is stirred to cause the potassium permanganate to be completely dissolved; (3), the mixed liquid obtained by the step (2) is put in microwave heating equipment to carry out microwave processing for a certain time, and then a brownish-black deposit is obtained; and (4), the brownish-black deposit obtained by the step (3) is filtered, washed and dried to obtain the conductive carbon / manganese dioxide composite material. The invention has simple preparation technology, high speed, low energy consumption, environmental protection, no pollution and easy industrialization production, and the prepared conductive carbon / manganese dioxide composite material used as a super capacitor electrode material not only has higher specific capacity but also has high power density and energy density and good cyclical stability.

Description

technical field [0001] The invention relates to the field of preparation of inorganic materials, in particular to a method for rapidly preparing conductive carbon / manganese dioxide composite electrode materials. Background technique [0002] Supercapacitor (Supercapacitor), also known as Electrochemical capacitor (Electrochemical capacitor), is a new type of energy storage element between traditional capacitors and batteries developed in the 1960s and 1970s. It has higher energy efficiency than traditional capacitors. Energy density and higher power density than secondary batteries, long cycle life, and instantaneous high current charge and discharge, have broad application prospects in computers, digital products, portable phones, electric vehicles, aerospace and defense industries, etc. In recent years, it has received extensive attention (P. Simon, et al., Nature Materials 7 (2008) 845; J.-K. Chang, et al, J. Power Sources 179 (2008) 435.). According to different energy ...

Claims

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Application Information

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IPC IPC(8): H01G9/058H01G9/042H01G11/38H01G11/46H01G11/86
CPCY02E60/13
Inventor 范壮军闫俊魏彤张密林
Owner HARBIN ENG UNIV
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