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Electrodeposition technology for preparing electrode material of RuO2 of super capacitor

A technology of supercapacitors and electrode materials, applied in the directions of hybrid capacitor electrodes, capacitors, electrolytic capacitors, etc.

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

AI Technical Summary

Problems solved by technology

At present, the inventor has not yet seen the preparation of RuO by direct current-differential pulse combined electrodeposition preparation technology. 2 ·nH 2 O thin film electrode material

Method used

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  • Electrodeposition technology for preparing electrode material of RuO2 of super capacitor
  • Electrodeposition technology for preparing electrode material of RuO2 of super capacitor
  • Electrodeposition technology for preparing electrode material of RuO2 of super capacitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] ① First, use metallographic sandpaper to polish metal tantalum foil with a purity greater than 99.95%, with a size of 12 mm, degrease with acetone, soak in lye, wash with mixed acid for 40 sec, and ultrasonically clean with deionized water. The lye soaking temperature is 75°C, the time is 6min, and the lye composition is NaHCO 3 , the mass percentage concentration is 3%. The composition ratio of the mixed acid is hydrofluoric acid (40% by volume): nitric acid (1.40g·cm -3 ): Sulfuric acid (1.84g·cm -3 )=10:2:5 (volume ratio).

[0029] ② Configure RuCl 3 ·3H 2 O, SnCl 2 and NaNO 3 The mixed solution, the concentration is 1mmol / L, 0.2mmol / L and 10mmol / L respectively, after fully stirring, let stand. The stirring time of the mixed solution is 0.5h, the stirring speed is 2r / min, and the standing time is 10min.

[0030] ③Electrodeposition process: DC-differential pulse combined electrodeposition technology is adopted, graphite is used as anode, metal tantalum sheet i...

Embodiment 2

[0034] ① First, use metallographic sandpaper to polish and polish metal tantalum foil with a purity greater than 99.95%, with a size of 18 mm, degrease with acetone, soak in lye, wash with mixed acid for 40 sec, and ultrasonically clean with deionized water. The lye soaking temperature is 72°C, the time is 8min, and the lye composition is Na 3 PO 4 , the mass percentage concentration is 5%. The composition ratio of the mixed acid is hydrofluoric acid (40% by volume): nitric acid (1.40g·cm -3 ): Sulfuric acid (1.84 cm -3 )=15:8:10 (volume ratio).

[0035] ② Configure RuCl 2 ·3H 2 O, SnCl 2 and NaNO 3 The mixed solution of the solution, the concentration is respectively 3mmol / L, 1mmol / L and 200mmol / L, after fully stirring, stand still. The stirring time of the mixed solution was 0.8h, the stirring speed was 6r / min, and the standing time was 18min.

[0036] ③Electrodeposition process: DC-differential pulse combined electrodeposition technology is adopted, graphite is use...

Embodiment 3

[0040] ① First, use metallographic sandpaper to polish metal tantalum foil with a purity greater than 99.95%, with a size of 34mm, degrease with acetone, soak in lye, wash with mixed acid for 40 seconds, and ultrasonically clean with deionized water. The lye soaking temperature is 80°C, the time is 10min, and the lye composition is NaH 2 PO 4 or Na 2 CO 3 , the mass percentage concentration is 10%. The composition ratio of the mixed acid is hydrofluoric acid (40% by volume): nitric acid (1.40g·cm -3 ): Sulfuric acid (1.84 cm -3 )=25:8:12 (volume ratio).

[0041] ② Configure RuCl 3 ·3H 2 O, SnCl 2 and NaNO 3 The mixed solution of the solution, the concentration is respectively 5mmol / L, 1mmol / L and 200mmol / L, after fully stirring, let stand. The stirring time of the mixed solution is 1 h, the stirring speed is 10 r / min, and the standing time is 30 min.

[0042] ③ Electrodeposition process: DC-differential pulse combined electrodeposition technology is adopted, graphit...

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Abstract

The invention relates to a DC-differential pulse combined electrodeposition technology for preparing an electrode material of RuO2 of a super capacitor. The technology comprises the following steps: adopting a metal foil with the purity larger than 99.95 percent as a basal piece, preparing a mixed solution of RuCl3.3H2O, SnCl2 and NaNO3 with the concentrations of 1 to 5mmol / L, 0.2 to 1mmol / L and 10 to 200mmol / L, and fully stirring and standing; using graphite as an anode and the metal foil as a cathode, firstly sedimentating with 1 to 3mA / cm<2> of DC for 0.5 hour to 1 hour, and then adopting a differential pulse current to sedimentate for 2 hours to 3 hours with the voltage pulse width of 1 to 10sec, the pulse period of 2 to 20sec, the amplitude of 0.01 to 0.02mA / cm<2>, the point voltage gain of 0.005 to 0.01mA / cm<2> and the final current concentration of 5 to 8mA / cm<2>; and preparing a film precursor of RuCl3.3H2O, naturally airing and processing a film at 200 DEG C to 500 DEG C with the heating speed of 10 DEG C / s and the heat-preservation time of 2 hours to 3 hours. The firstly proposed DC-differential pulse combined electrodeposition technology for preparing the film of RuO2 has simple process and simple and convenient operation, has a certain industrial value. An electrochemical tester CHI660C is used for testing the electrochemical performance of the film material, and adhesive force is tested by a drawing method of GB5210-82 to obtain the test results: the specific capacitance reaches 720F / g, and the adhesive force reaches 11.3MPa.

Description

technical field [0001] The invention relates to the field of electrochemical capacitors, and relates to a method for preparing supercapacitor coating electrode materials by electrodeposition. Background technique [0002] With the development of high-end electronic equipment in the direction of miniaturization, light weight, high reliability and long life, capacitors in electronic devices must develop in the direction of large capacity, small size, high power density and excellent pulse discharge performance. Traditional capacitors can no longer meet the requirements of high-end electronic equipment. With its specific power dozens of times that of batteries, specific energy hundreds of times that of physical capacitors, and high charge and discharge efficiency, super capacitors can continuously discharge large currents without maintenance. Maintenance, long life and other characteristics are being widely used in aviation, aerospace, national defense technology, mobile commun...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D5/18C25D5/38C25D5/50H01G9/058H01G9/042H01G11/46H01G11/86
CPCY02E60/13
Inventor 甘卫平刘泓师响刘继宇李祥马贺然
Owner CENT SOUTH UNIV