Electrochemical capacitor and electro-adsorption desalination electrode material

A technology for electrode materials and capacitors, applied in the manufacture of hybrid capacitor electrodes, hybrid/electric double layer capacitors, etc., can solve the problems of serious self-discharge of electrochemical capacitors, large electrode energy loss, unfavorable industrial applications, etc., and achieve electro-adsorption of inorganic salts Excellent ionic performance, strong electrical conductivity, and good charge-discharge repeatability

Inactive Publication Date: 2015-09-16
HUAIBEI NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional ruthenium oxide has a large capacitance and is favored by electrochemists, but it has not been able to be applied industrially due to its high price [Kvastek, K.; Horvat-Rado?evic, V. Electrochemical properties of hydrous ruthenium oxide films formed and measured at different potentialsJournal of Electroanalytical Chemistry Volume: 511, Issue: 1-2, September 21, 2001, pp. 65 - 78], the patent CN02217073.1 uses sintered nickel oxide as the electrode material, which has high power density and energy density. And light weight, low cost, lo

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of electrochemical capacitor electrode material, its preparation steps are as follows:

[0022] 1. Preparation of nickel salt solution: add a protective agent with a concentration of 10 to 50 g / l into the nickel salt solution with a concentration of 0.5 to 2.5 mol / l;

[0023] 2. Mixing: Put 10-20 g / l carbon nanotubes and 75-200 g / l urea into the above-mentioned nickel salt solution, first stir at room temperature for 2 h, then stir magnetically at 80°C for 1-6 h ;

[0024] 3. Preparation of nano-nickel oxide powder: suction filter and wash the precipitate produced in step 2 until neutral, put it in an oven and dry it at 100°C, and calcinate the obtained product at 300-500°C for 4-5 hours to obtain nano-nickel oxide powder. Carbon tube loaded nano-nickel oxide powder;

[0025] 4. Electrode preparation: uniformly mix the carbon nanotube-supported nano-nickel oxide powder and PTFE emulsion at a mass ratio of 95:5 to 70:30, set the temperature at 100°C, and dry for...

Embodiment 2

[0030] Weigh 500g of nickel chloride hexahydrate, dissolve 400g of sodium dodecyl sulfonate in deionized water, and prepare 10L of nickel salt solution, add 2Kg of graphene at 60°C and stir for 6h, then add 30L of absolute ethanol, drop in 2mol / l sodium hydroxide solution, after suction filtration and drying, the resulting product was calcined at 500°C for 5 hours to obtain graphene-supported nano-nickel oxide. Carbon nanotube-supported nano-nickel oxide powder and phenolic resin are uniformly mixed in a mass ratio of 80:20, and pressed under a pressure of 20Mpa to form a carbon nanotube-supported nano-nickel oxide electrode. The obtained electrode is bonded to the current collector, and the glass fiber is used as the separator. The desalination research is carried out on the sodium chloride solution with a concentration of 1000mg / L. The desalination rate can reach more than 96%, which fully meets the national drinking water concentration standard.

Embodiment 3

[0032] Weigh 10 grams of nickel nitrate hexahydrate, dissolve 10 grams of sodium dodecyl sulfonate in deionized water, and prepare 200 ml of nickel salt solution, add 5 grams of graphene and 10 grams of multi-walled carbon nanotube composite material at 50° C. and stir for 4 hours, then Add 500ml of absolute ethanol, drop in 2mol / l sodium hydroxide solution, suction filter and dry, and calcinate the obtained product at 450°C for 3h to obtain a graphene / nano-nickel oxide / carbon nanotube sample. Graphene / nano-nickel oxide / carbon nanotube powder and phenolic resin are uniformly mixed in a mass ratio of 80:20, and pressed under a pressure of 20Mpa to form a graphene / nano-nickel oxide / carbon nanotube electrode. The electrodes obtained in 10 groups were bonded to the current collector, and the glass fiber was used as a separator to conduct desalination research on a sodium chloride solution with a concentration of 800mg / L. The desalination rate can reach more than 98%, which fully me...

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Abstract

The invention discloses an electrochemical capacitor and electro-adsorption desalination electrode material, which is formed by the combination of nano nickel oxide and nano carbon materials. The preparation method of the electrochemical capacitor and electro-adsorption desalination electrode material comprises the steps of: 1, preparing a nickel salt aqueous solution; 2, mixing the nickel salt aqueous solution with the nano carbon materials; 3, preparing nanocarbon/nickel oxide composite powder; 4, and preparing an electrode. The electrochemical capacitor and electro-adsorption desalination electrode material obtains large capacitance by utilizing oxidation-reduction property of the nano nickel oxide, is high in conductivity, high in specific surface area and high in utilization rate of specific surface area, endows the electrode with high capacitance of capacitor and energy density, has good charging-discharging repeatability, is easy to implement technological parameter control, is even to coat the nano carbon with the nano nickel oxide, and is suitable for industrialized mass production; and the prepared nickel oxide electrode is small in expansion and high in specific capacity, and has good charging-discharging performance, excellent inorganic ion electro-adsorption performance, long service life, and very high practical value.

Description

technical field [0001] The invention relates to an electrochemical capacitor and an electrode material for electroadsorption desalination, belonging to the field of chemical engineering and new materials. Background technique [0002] In the past ten years, developed countries such as Russia, the United States, and Japan have actively developed a battery designed to address the defects in pulse output power, low-temperature discharge characteristics, and service life exposed in actual use of chemical secondary power sources such as batteries. A physical energy storage secondary power supply that makes up for the above-mentioned shortcomings of the battery - an electrochemical capacitor. Electrochemical capacitors not only have the energy storage characteristics of batteries, but also have the power characteristics of capacitors. Compared with traditional electrolytic capacitors, their product energy density is thousands of times higher, while the leakage current is thousands...

Claims

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Application Information

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IPC IPC(8): H01G11/86H01G11/46H01G11/24H01G11/26
CPCY02E60/13H01G11/86H01G11/24H01G11/26H01G11/46
Inventor 代凯徐美彦朱光平耿磊
Owner HUAIBEI NORMAL UNIVERSITY
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