Ultracapacitor activated carbon in sulfuric acid electrolyte and application thereof

A technology of activated carbon and carbonization, which is applied in the field of supercapacitor materials, can solve problems that need to be studied, and achieve the effects of low cost, high specific capacitance, and good capacitance properties

Inactive Publication Date: 2012-11-21
SOUTH CHINA NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Activated carbon with high specific surface can be generally obtained by activating ordinary carbon with strong alkali or phosphoric acid. These activated carbons have improved capacitance properties in strong alkaline, neutral or weakly acidic electrolytes. Activated carbon with rich functional groups on the surface will show high specific capacitance, so the application of activated carbon made from ordinary carbon sources through strong alkali activation or phosphoric acid activation in supercapacitor batteries remains to be studied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Add 25g of polyethylene terephthalate into a porcelain boat, put it into a tube furnace, blow nitrogen, raise the temperature to 300°C, and carbonize for 2 hours. After carbonization, the carbonized product was obtained. Take 2g of the charcoal and 8g of potassium chloride, pour it into a beaker, add 10ml of distilled water into the beaker, stir for 5min, then ultrasonically treat it for 0.5h, and vacuum dry it at 60°C for 10h. After drying, put the mixture into a porcelain boat , under the protection of nitrogen, calcined at 800°C for 3h, cooled naturally, washed with 0.1mol / L dilute hydrochloric acid, then washed with distilled water until neutral, dried at 60°C for 5h, and the target product was obtained.

[0019] The specific surface of the above target product reaches 1800m 2 / g, the prepared activated carbon is mixed with graphite, acetylene black, and PVDF in a mass ratio of 80:10:5:5, and NMP is added to make a slurry, and a titanium sheet is used as a current c...

Embodiment 2

[0021] Add 25g of polyethylene terephthalate into the porcelain boat, put it into a tube furnace, blow nitrogen, raise the temperature to 600°C, and carbonize for 2 hours. After carbonization, the charcoal was obtained. Take 2g of the charcoal and 8g of potassium carbonate, pour them into a beaker, add 10ml of distilled water into the beaker, stir for 5min, then ultrasonicate for 0.5h, and vacuum dry at 60°C for 10h. After drying, put the mixture into a porcelain boat. Under the protection of nitrogen, calcined at 600°C for 5h, cooled naturally, rinsed with 0.1mol / L dilute hydrochloric acid, and then rinsed with distilled water until neutral, dried at 60°C for 5h to obtain the target product.

[0022] The specific surface of the above target product reaches 1930m 2 / g, the prepared activated carbon is mixed with graphite, acetylene black, and PVDF in a mass ratio of 80:10:5:5, and NMP is added to make a slurry, and a titanium sheet is used as a current collector, which is coat...

Embodiment 3

[0024] Add 25g of polyethylene terephthalate into the porcelain boat, put it into a tube furnace, blow nitrogen, raise the temperature to 600°C, and carbonize for 1h. After carbonization, the charcoal is obtained. Take 2g of the charcoal and 8g of potassium hydroxide, pour it into a beaker, add 10ml of distilled water into the beaker, stir for 5min, then ultrasonicate for 0.5h, and vacuum dry at 60°C for 10h. After drying, put the mixture into a porcelain boat , under the protection of nitrogen, calcined at 650°C for 0.5h, cooled naturally, rinsed with 0.1mol / L dilute hydrochloric acid, and then rinsed with distilled water until neutral, dried at 60°C for 5h to obtain the target product.

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Abstract

The invention discloses an ultracapacitor activated carbon in sulfuric acid electrolyte and application thereof. The activated carbon is prepared by the following method: charring aromatic polymer, mixing the carbide obtained by charring and an alkali metal compound, and activating at high temperature in an inert atmosphere to prepare the activated carbon, wherein the mass ratio of the carbide tothe alkali metal compound is 0.1-15. The prepared activated carbon has the advantages of readily available raw materials, low cost, mild preparation condition, easy industrial production, good electrochemical performance under lead-acid storage battery environment, higher specific capacitance, no obvious capacity attenuation after 10,000 times of circulation, particularly outstanding charging anddischarging performance under heavy current, good capacitance property in concentrated sulfuric acid, and capacity of being used as a better candidate material for an ultracapacitor storage battery.

Description

technical field [0001] The invention relates to a supercapacitor material, in particular to a supercapacitor activated carbon used in a sulfuric acid electrolyte. Background technique [0002] Supercapacitors, also known as electrochemical capacitors, are a new type of energy storage device developed in the 1970s and 1980s. Because supercapacitors have higher energy density than ordinary batteries, excellent instantaneous charge and discharge performance, and long cycle life, they can be used as a non-polluting backup power supply for various electrical equipment. At the same time, they can form a composite power supply with batteries. The power provided by electric vehicles has received widespread attention and developed rapidly in recent years. [0003] Lead-acid batteries have survived for 150 years. Due to their mature technology, low price, high safety, and renewable cycles, dozens of new batteries such as cadmium-nickel batteries, hydrogen-nickel batteries, and lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/12H01B1/04H01G9/042H01G9/145
CPCY02E60/13
Inventor 舒东彭亮波陈红雨文萃程福奎
Owner SOUTH CHINA NORMAL UNIVERSITY
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