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A method for constructing a catalytic electrode-redox electrolyte capacitor system

A technology of catalytic electrode and construction method, applied in the field of construction of catalytic electrode-redox electrolyte capacitance system, can solve problems such as lack of sufficient understanding of capacitance performance, and achieve the effect of good promotion and application potential, low technical threshold, and good capacitance performance

Inactive Publication Date: 2021-05-18
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, until now, there is still insufficient understanding of the interfacial interactions between electrodes and redox electrolytes in such capacitive systems and their impact on capacitive performance.

Method used

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  • A method for constructing a catalytic electrode-redox electrolyte capacitor system
  • A method for constructing a catalytic electrode-redox electrolyte capacitor system

Examples

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Embodiment 1

[0024] Step S1: Cut the commercial nickel foam into a size of 1.5×1.5×0.1cm 3 Afterwards, immerse in dilute hydrochloric acid solution with a concentration of 0.1mol / L, clean and remove impurities on the surface of nickel foam and etch the surface, then wash and dry with deionized water and acetone in turn to obtain a catalytic current collector for use;

[0025] Step S2: Prepare 30 mL of electrolyte matrix solution containing 2 mol / L alkaline KOH, and then add redox active additives to form redox active electrolytes, wherein the redox active additives consist of 0.5 mmol of potassium ferricyanide and 0.5 mmol of ferrous Composition of potassium cyanide;

[0026] Step S3: immerse the catalytic current collector foam nickel obtained in the step S1 pretreatment in the redox active electrolyte prepared in the step S2, and form a three-electrode capacitance system with a mercury oxide reference electrode and a platinum sheet auxiliary electrode. The three-electrode capacitance sys...

Embodiment 2

[0028] Step S1: Cut the commercial current collector foam nickel into a size of 1.5×1.5×0.1cm 3Afterwards, immerse in dilute hydrochloric acid solution with a concentration of 0.1mol / L, clean and remove the impurity components on the surface of the nickel foam of the commercial current collector and etch the surface, then wash and dry with deionized water and acetone in turn to obtain the catalytic current collector for use;

[0029] Step S2: Prepare 30 mL of electrolyte matrix solution containing 6 mol / L alkaline KOH, and then add redox active additives to form redox active electrolytes, wherein the redox active additives consist of 2 mmol of potassium ferricyanide and 2 mmol of ferrocyanide Potassium composition;

[0030] Step S3: Submerge the catalytic current collector obtained in step S1 pretreatment in the redox active electrolyte prepared in step S2, and form a three-electrode capacitance system with a mercury oxide reference electrode and a platinum auxiliary electrode...

Embodiment 3

[0032] Step S1: Cut the commercial nickel foam into a size of 1.5×1.5×0.1cm 3 Afterwards, immerse in dilute hydrochloric acid solution with a concentration of 0.2 mol / L, clean and remove the impurity components on the surface of the nickel foam and etch the surface, then wash and dry with deionized water and acetone in turn to obtain a catalytic current collector for use;

[0033] Step S2: Prepare 30 mL of electrolyte matrix solution containing 2 mol / L alkaline KOH, and then add 2 mmol of oxidation active additive potassium iodide to form a redox active electrolyte;

[0034] Step S3: Submerge the catalytic current collector obtained by the pretreatment in step S1 in the redox active electrolyte prepared in step S2, and form a three-electrode capacitance system with a mercury oxide reference electrode and a platinum auxiliary electrode. The three-electrode capacitance system has an area of The current density is 8.9mA / cm 2 , the area capacitance at room temperature is 1777mF / c...

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Abstract

The invention discloses a method for constructing a catalytic electrode-redox electrolyte capacitor system, which belongs to the technical field of supercapacitors. The present invention uses a commercialized current collector to form a novel catalytic electrode-redox electrolyte capacitor system with specific redox electrolyte components without depositing or coating any active materials. Catalysis, providing higher capacitance through the double Faraday reaction of electrodes and electrolytes, which has high Faraday capacitance in a wide temperature window, and can arbitrarily enlarge the capacitance capacity by increasing the electrode area, which can effectively avoid traditional capacitors. The capacitance attenuation problem in the process can be used to store high-efficiency energy at a lower technical threshold and cost, which has more important promotional significance.

Description

technical field [0001] The invention belongs to the technical field of supercapacitors, and in particular relates to a method for constructing a catalytic electrode-redox electrolyte capacitance system, which is used to effectively improve the capacitance performance of supercapacitors. Background technique [0002] Supercapacitor is a kind of green and efficient energy storage device, which has the advantages of high power density, fast charge and discharge speed, long cycle life and safe operation. The electrode is the main place where the ion electric double layer physical adsorption and Faradaic reaction take place in the supercapacitor. The electrode material is generally considered to be the key component that determines the energy storage performance of the supercapacitor. Structure and redox active electrode materials, thereby improving the electric double layer and faradaic capacitance of the electrode. Recent studies have shown that adding redox substances to the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/84H01G11/86H01G11/66H01G11/54
CPCY02E60/13
Inventor 常玖利陈利明高志永武大鹏徐芳蒋凯
Owner HENAN NORMAL UNIV
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