Preparation technique of composite film electrode used for a super capacitor

A technology of supercapacitors and composite films, applied in the direction of capacitor electrodes, capacitor parts, etc., can solve the problems of application limitation and high price, and achieve the effects of high specific capacity, easy operation and long life.

Inactive Publication Date: 2009-09-16
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price of ruthenium oxide, its application is limited, so people have been looking for low-cost, high specific capacitance ruthenium dioxide-based composite electrode materials, in order to greatly reduce the cost of electrode materials

Method used

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  • Preparation technique of composite film electrode used for a super capacitor
  • Preparation technique of composite film electrode used for a super capacitor

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ①Pretreatment process: First, use 400# metallographic sandpaper for roughening treatment, 800# metallographic sandpaper for grinding and polishing, then wash with acetone for 5-10 minutes; use phosphoric acid 40g / L, sodium hydroxide 5g / L, sodium silicate 20g / L and sodium carbonate 10g / L is heated and soaked for 10-15min, at 100mA / cm 2 , 70 ~ 80 ℃ cathodic electrolytic degreasing; hot washing in 20mL of hydrofluoric acid with a concentration of 40%, 10mL of nitric acid with a concentration of 1.4g / mL and 15mL of sulfuric acid with a concentration of 1.84g / mL, and then degreasing After cleaning with ion water, it is ready to use. During the cleaning process, ultrasonic cleaning is used to assist cleaning.

[0029] ② Configure electrodeposition solution, RuCl 3 2H 2 The concentration of O is fixed at 5mmol / L, and the SnCl 2 2H 2 The concentration of O depends on the Sn in the solution 2+ with Ru 3+ The molar concentration ratio is 1:1, the HCl and SnCl added in the ...

Embodiment 2

[0034] ①Pretreatment process: First, use 400# metallographic sandpaper for roughening treatment, 800# metallographic sandpaper for grinding and polishing, then wash with acetone for 5-10 minutes; use phosphoric acid 40g / L, sodium hydroxide 5g / L, sodium silicate 20g / L and sodium carbonate 10g / L is heated and soaked for 10-15min, at 100mA / cm 2 , 70 ~ 80 ℃ cathodic electrolytic degreasing; hot washing in 20mL of hydrofluoric acid with a concentration of 40%, 10mL of nitric acid with a concentration of 1.4g / mL and 15mL of sulfuric acid with a concentration of 1.84g / mL, and then degreasing After cleaning with ion water, it is ready to use. During the cleaning process, ultrasonic cleaning is used to assist cleaning.

[0035] ② Configure electrodeposition solution, RuCl 3 2H 2 The concentration of O is fixed at 5mmol / L, and the SnCl 2 2H 2 The concentration of O depends on the Sn in the solution 2+ with Ru 3+ The molar concentration ratio is 2:1, the HCl and SnCl added in the ...

Embodiment 3

[0040] ①Pretreatment process: First, use 400# metallographic sandpaper for roughening treatment, 800# metallographic sandpaper for grinding and polishing, then wash with acetone for 5-10 minutes; use phosphoric acid 40g / L, sodium hydroxide 5g / L, sodium silicate 20g / L and sodium carbonate 10g / L is heated and soaked for 10-15min, at 100mA / cm 2 , 70 ~ 80 ℃ cathodic electrolytic degreasing; hot washing in 20mL of hydrofluoric acid with a concentration of 40%, 10mL of nitric acid with a concentration of 1.4g / mL and 15mL of sulfuric acid with a concentration of 1.84g / mL, and then degreasing After cleaning with ion water, it is ready to use. During the cleaning process, ultrasonic cleaning is used to assist cleaning.

[0041] ② Configure electrodeposition solution, RuCl 3 2H 2 The concentration of O is fixed at 5mmol / L, and the SnCl 2 2H 2 The concentration of O depends on the Sn in the solution 2+ with Ru 3+ The molar concentration ratio, the preparation ratio is 3:1, the HCl...

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Abstract

The invention discloses a preparation technique of a composite film electrode used for a super capacitor; the preparation technique is characterized by comprising the following steps: pre-processing on high-purity metal tantalum foil with the purity of more than 99.95 percent: grinding and roughening, grinding and polishing, removing oil and cleaning to the metal tantalum foil; 2) electrodeposition technique; and 3) heat processing to the composite film electrode. The composite film electrode prepared by adopting the technique can reduce the using amount of noble metal ruthenium on the basis of guaranteeing capacitance characteristic, thus reducing the cost.

Description

technical field [0001] The invention belongs to the field of electrochemical capacitors, and relates to a preparation process of a composite thin-film electrode for a supercapacitor, in particular to a tantalum-based (RuO 2 / SnO 2 )·nH 2 O composite thin film electrode preparation process. Background technique [0002] Supercapacitor is a new type of green energy storage element, which has excellent pulse charge and discharge performance, super large capacity and high energy storage density. Its capacity is 20 to 200 times that of traditional capacitors, and its power density is nearly Ten times, and the charge and discharge efficiency is high, no maintenance and maintenance, long life, in mobile communications, electronic information technology, green energy industry, electric vehicles, aviation, aerospace, weapons and national defense technology has a wide range of application prospects and development potential. According to the charge storage mechanism, supercapacito...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G9/04C25D3/30C25D3/50C25D5/50
CPCY02E60/13
Inventor 甘卫平师响刘泓刘继宇李祥马贺然
Owner CENT SOUTH UNIV
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