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A kind of preparation method of layered nickel-iron hydroxide electrode

A technology of hydroxide and nickel-iron, which is applied in the direction of electrodes, electrolytic components, electrolysis process, etc., can solve the problem of poor chemical stability and activity of layered nickel-iron hydroxide, limit the industrial utilization of layered nickel-iron hydroxide, etc. Problems, to achieve the effect of superior electrocatalytic activity and stability, good sample activity, and reduce production costs

Active Publication Date: 2018-10-30
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the chemical stability and activity of layered nickel-iron hydroxides synthesized by solvothermal method are poor, which limits the further industrial utilization of layered nickel-iron hydroxides.

Method used

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  • A kind of preparation method of layered nickel-iron hydroxide electrode
  • A kind of preparation method of layered nickel-iron hydroxide electrode
  • A kind of preparation method of layered nickel-iron hydroxide electrode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] 1) Put the 2cm×5cm foam copper in concentrated hydrochloric acid for ultrasonic cleaning for 5 minutes, rinse the foam copper repeatedly with deionized water, and then place it in deionized water for ultrasonic cleaning for 5 minutes;

[0035] 2) prepare the solution containing iron salt, nickel salt and urea, wherein iron salt concentration is: 18mmol / L, nickel salt concentration is: 12mmol / L, and the concentration of urea is: 60mmol / L; Wherein, iron salt is iron sulfate; The nickel salt is nickel sulfate.

[0036] 3) Take an appropriate amount of the above solution and put it in a stainless steel reaction kettle with a 30mL specification and a polytetrafluoroethylene lining, and put it into the foamed copper cleaned in step 1). The hydrothermal kettle was placed in a 120°C oven for 12 hours, cooled to room temperature naturally, rinsed repeatedly with deionized water and absolute ethanol, and washed with N 2 Purging and drying to obtain a NiFe-LDH electrode; wherein,...

Embodiment 2

[0041] 1) put the nickel foam of 2cm×5cm in concentrated hydrochloric acid for ultrasonic cleaning for 5min, repeatedly rinse the nickel foam with deionized water and then put it into deionized water for ultrasonic cleaning for 5min;

[0042] 2) prepare the solution containing iron salt, nickel salt and urea, wherein iron salt concentration is: 18mmol / L, nickel salt concentration is: 12mmol / L, and the concentration of urea is: 60mmol / L; Wherein, iron salt is ferric chloride ; Described nickel salt is nickel chloride.

[0043] 3) Take an appropriate amount of the above solution and put it in a stainless steel reaction kettle with a 30mL specification and a teflon lining and put it into the nickel foam cleaned in step 1). The hydrothermal kettle was placed in a 120°C oven for 12 hours, cooled to room temperature naturally, rinsed repeatedly with deionized water and absolute ethanol, and washed with N 2 Purging and drying to obtain a NiFe-LDH electrode; wherein, the volume filli...

Embodiment 3

[0047] 1) Put the copper foam of 2cm×5cm in concentrated hydrochloric acid for ultrasonic cleaning for 5 minutes, rinse the copper foam with deionized water repeatedly, and then put it into deionized water for ultrasonic cleaning for 5 minutes;

[0048] 2) prepare the solution containing iron salt, nickel salt and urea, wherein iron salt concentration is: 18mmol / L, nickel salt concentration is: 12mmol / L, and the concentration of urea is: 60mmol / L; Wherein, iron salt is iron acetate; The nickel salt is nickel acetate.

[0049] 3) Take an appropriate amount of the above solution and put it in a stainless steel reaction kettle with a 30mL specification and a polytetrafluoroethylene lining, and put it into the foamed copper cleaned in step 1). The hydrothermal kettle was placed in a 120°C oven for 12 hours, cooled to room temperature naturally, rinsed repeatedly with deionized water and absolute ethanol, and washed with N 2 Purging and drying to obtain a NiFe-LDH electrode; where...

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Abstract

The invention discloses a preparation method of a layered ferronickel hydroxide electrode. The preparation method comprises the following steps: preparing a solution containing a ferric salt, a nickel salt and urea, wherein the concentration of the ferric salt is 1-100mmol / L, the concentration of the nickel salt is 1-100mmol / L and the concentration of the urea is 2-200mmol / L; and placing a substrate into the solution containing the ferric salt, the nickel salt and the urea, then placing the substrate in a hydrothermal reactor at the temperature of 60-180 DEG C, keeping the temperature for 1-20h, then washing and drying the substrate, and carrying out plasma treatment or high temperature calcination treatment in a protective atmosphere finally to obtain the layered ferronickel hydroxide electrode. The preparation method, is lower in reaction temperature, short in reaction time, simple in preparation process, strong in controllability and good in repeatability, improves the production efficiency, lowers the production cost, is green and environmental friendly and can effectively solve the problem of environmental pollution without participation of an organic solvent and a toxic chemical reagent in the reaction process.

Description

technical field [0001] The application belongs to the field of thin film electrode preparation, and in particular relates to a preparation method of a layered nickel-iron hydroxide electrode. Background technique [0002] As a new type of functional material, nickel-iron hydroxide with a layered structure has high specific surface area, good thermal conductivity, good intrinsic damping, abundant reserves of required elements, lamellae can be detached, reassembled, and can be used as Electrocatalytic hydrogen production and oxygen production electrode and other excellent characteristics. Nickel-iron hydroxide is used in gas storage, catalyst support, lithium-ion secondary battery electrode materials, lightweight structural materials, electrocatalytic water splitting materials, electrocatalytic carbon dioxide reduction materials, photocatalytic co-catalyst materials, supercapacitor electrode materials and fuels Many new technology fields such as batteries have huge potential ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B11/06
CPCC25B11/075
Inventor 沈少华王蒙桑杰·马图拉托马斯·费舍尔
Owner XI AN JIAOTONG UNIV
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