Preparation method of activated carbon electrode material and preparation method of manganese oxide/activated carbon composite electrode material

A composite electrode and activated carbon technology, which is used in the preparation of activated carbon electrode materials and the preparation of manganese oxide/activated carbon composite electrode materials, can solve the problems of low strength and activation degree, low activated carbon yield, and affect the atmospheric environment, etc., to improve cycle performance, Enhance the magnification performance, solve the effect of resource waste and environmental pollution problems

Active Publication Date: 2018-09-18
WEIFANG HUICHENG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with coal-based activated carbon, activated carbon produced from straw has the disadvantages of lower strength, activation degree, and poor conductivity. At the same time, the yield of activated carbon produced from straw is low. Most of the research results of straw activated carbon electrode materials are still in the laboratory. stage
However, crop straws exist widely, and straw burning seriously affects the atmospheric environment. Therefore, it is necessary to solve the problem of how to improve the comprehensive utilization and utilization rate of crop straws.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Corn stalks are crushed to straw particles with a particle size of 0.35-0.42mm, and the straw particles are passed through a 40-mesh sieve, and dried until the moisture content of the straw particles is lower than 10%; the dried straw particles are put into a crucible, and the Under the atmosphere, heat in the kiln to 500-600°C at a heating rate of 5-10°C / min, and then keep the temperature in the kiln for 4 hours to obtain the carbonized corn stalk material; the carbonized corn stalk material and KOH are mixed according to the mass ratio 1:1~5:1 mix evenly and add to the crucible, under the protective atmosphere of argon, heat the mixture to 700~1000℃ in the kiln according to the heating rate of 5~10℃ / min, keep it for 2 hours Cool to normal temperature; wash the mixture cooled to normal temperature with an acidic solution, then wash with pure water until the pH value is 6-7, dry and crush to particles with a particle size of 15-20 μm to obtain activated carbon materials....

Embodiment 2

[0031] Corn stalks are crushed to straw particles with a particle size of 0.35-0.42mm, and the straw particles are passed through a 40-mesh sieve, and dried until the moisture content of the straw particles is lower than 10%; the dried straw particles are put into a crucible, and the Under the atmosphere, heat in the kiln to 500-600°C at a heating rate of 5-10°C / min, and then keep the temperature in the kiln for 3 hours to obtain the carbonized corn stalk material; the carbonized corn stalk material and NaOH are 1:1~5:1 mix evenly and add to the crucible, under the protective atmosphere of argon, heat the mixture to 700~1000℃ in the kiln according to the heating rate of 5~10℃ / min, keep it for 2 hours Cool to normal temperature; wash the mixture cooled to normal temperature with an acidic solution, then wash with pure water until the pH value is 6-7, dry and crush to particles with a particle size of 15-20 μm to obtain activated carbon materials.

[0032] Then mix the potassium...

Embodiment 3

[0037]Corn stalks are crushed to straw particles with a particle size of 0.35-0.42mm, and the straw particles are passed through a 40-mesh sieve, and dried until the moisture content of the straw particles is lower than 10%; the dried straw particles are put into a crucible, and the Under the atmosphere, heat to 500-600°C in the kiln according to the heating rate of 5-10°C / min, and then keep the temperature in the kiln for 5 hours to obtain the carbonized material of corn stalks; the carbonized material of corn stalks and CaCl 2 Mix evenly according to the mass ratio of 1:1~5:1 and add to the crucible. Under the protective atmosphere of argon, heat the mixture to 700~1000℃ in the kiln according to the heating rate of 5~10℃ / min, and keep it warm. After 2 hours, cool to normal temperature; wash the mixture cooled to normal temperature with acidic solution, then wash with pure water until the pH value is 6-7, dry and grind to particles with a particle size of 15-20 μm to obtain ac...

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Abstract

The invention discloses a preparation method for an active carbon electrode material by corn straw and a preparation method for a MnO / active carbon composite electrode material by the corn straw. The active carbon electrode material can be prepared by process steps of smashing the corn straw, heating the corn straw, adding an alkali, mixing the corn straw and the alkali and performing heating, pickling and distillation, and the MnO / active carbon composite electrode material is prepared by processes of pickling, washing and drying after a sodium hydroxide solution is added into the prepared active carbon and a mixture of a potassium permanganate solution and an ethanol solution for reaction. With the composite electrode material prepared by the method, the cycle performance of a transition metal oxide is effectively improved, the cycle stability of the material is improved, and the rate performance of the electrode material is improved; and moreover, the problems of resource waste and environmental pollution brought by straw exhaust gas and incineration are solved, and the comprehensive development utilization and the utilization ratio of crop straw are improved.

Description

technical field [0001] The invention relates to the technical field of electrode material preparation, in particular to a method for preparing an activated carbon electrode material and a method for preparing a manganese oxide / activated carbon composite electrode material. Background technique [0002] At present, the electrode material of supercapacitor mainly adopts manganese oxide / activated carbon composite electrode material, and the raw materials of activated carbon in the composite electrode material include coal, wood, fruit shell, walnut shell and straw, etc. These carbon-containing materials are placed in the activation furnace, It is converted into activated carbon by pyrolysis under high temperature and pressure. Compared with coal-based activated carbon, activated carbon produced from straw has the disadvantages of lower strength, activation degree, and poor conductivity. At the same time, the yield of activated carbon produced from straw is low. Most of the rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/86H01G11/44H01G11/24H01G11/34H01G11/30H01G11/46
CPCY02E60/13
Inventor 王金华
Owner WEIFANG HUICHENG NEW MATERIAL TECH
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