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Post-treatment process for preparing super-capacitor active carbon with super-low ash content

A technology of supercapacitor and treatment process, which is applied in the direction of inorganic chemistry, non-metallic elements, carbon compounds, etc., can solve the problems of high added value and low operating cost of supercapacitor activated carbon, and achieve reduced ash content, low operating cost, and reduced The effect of dosage

Inactive Publication Date: 2012-06-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the investment cost of one-time equipment is large, the operating cost is low, and the added value of supercapacitor activated carbon is high. Compared with conventional activated carbon, the demand is less, so this method is a better way to prepare ultra-low ash supercapacitor activated carbon.

Method used

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  • Post-treatment process for preparing super-capacitor active carbon with super-low ash content
  • Post-treatment process for preparing super-capacitor active carbon with super-low ash content

Examples

Experimental program
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Effect test

Embodiment 1

[0036] Soak 30g of activated coconut shell-based activated carbon with 280ml of 0.3mol / L potassium hydroxide solution for 6 hours, then transfer it to a 1L hydrothermal reactor and react at 120°C for 2 hours. After the reaction is complete, filter, wash with deionized water 3 times, put the activated carbon wet material into 5wt% hydrochloric acid solution for 3 hours, transfer to a hydrothermal kettle for reaction at 120°C for 1 hour, filter, and wash 3 times with deionized water , And then react in hot water at 60°C for 1 hour, filter, deionize and wash until neutral, and dry at 150°C for 2 hours to obtain a super capacitor activated carbon product.

Embodiment 2

[0040] 30g of activated coal-based activated carbon was soaked in 300ml of 0.5mol / L potassium hydroxide solution for 8 hours, then transferred to a 1L hydrothermal reactor and reacted at 150°C for 2 hours. After the reaction is completed, filter, wash with deionized water 3 times, put the activated carbon wet material into 5wt% hydrochloric acid solution for 6 hours, transfer to a hydrothermal kettle for 1 hour at 150°C, filter, and wash 3 times with deionized water , Then react in hot water at 60°C for 1 hour, wash with deionized water to neutrality, and dry at 150°C for 2 hours to obtain activated carbon for super capacitors.

Embodiment 3

[0044] The order of alkaline washing and acid washing in Example 1 is exchanged, and the rest of the steps are the same to obtain the super capacitor activated carbon product.

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Abstract

The invention relates to a post-treatment process for preparing super-capacitor active carbon with super-low ash content. According to the invention, by combining high-temperature and high-pressure characteristics of a hydrothermal technique, a method including the steps of alkali washing, acid washing and water washing is adopted, so that the content of ash content impurities in the active carbon is greatly reduced and the active carbon becomes a high-performance electrode material which is high in electrical conductivity and strength and is applicable to a super capacitor. A buckle type super capacitor which is manufactured by the active carbon refined by the post-treatment process has the advantages of low resistance, small leakage current and long cycling life.

Description

Technical field [0001] The invention belongs to the technical field of treatment of high-performance activated carbon in new energy and new materials, and mainly relates to the removal of impurities of supercapacitor activated carbon, a method for effectively reducing the ash content of activated carbon, and improving and stabilizing the quality of supercapacitor activated carbon electrode materials. Background technique [0002] Supercapacitor electrode materials mainly include three types of materials: activated carbon, metal oxides and conductive polymers. They have their own advantages and disadvantages. Metal oxide materials have large capacity but are expensive. Conductive polymers have good processing properties and can be mass-produced, but they are easily swelled by the electrolyte and their performance declines rapidly. [0003] Activated carbon electrode material is a super capacitor electrode material commonly used by major companies because of its low production cost, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/08C01B32/354
Inventor 刘洪涛王赞刘艳胡小勇杨丽
Owner CENT SOUTH UNIV
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