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Alkaline water electrolysis total battery

A technology of water electrolysis cell and full battery, which is applied in the direction of electrolysis process, electrolysis components, electrodes, etc., can solve the problems such as difficult to achieve high-efficiency catalysis, and achieve the effect of stable structure and catalytic performance, high stability and stable structure

Active Publication Date: 2020-06-02
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with HER, it is difficult to achieve highly efficient catalytic OER due to the thermodynamic and kinetic limitations of metal sulfides.

Method used

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  • Alkaline water electrolysis total battery
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  • Alkaline water electrolysis total battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Electrode material pretreatment: nickel content ≥ 99.5%, thickness 100 microns, area 10 cm 2 The nickel sheet is used as the base material, firstly through 800# and 1200# # Polish the surface with water abrasive paper until the surface is smooth, then soak it in acetone at room temperature for 15 minutes to remove the surface grease; finally soak it in 0.5M hydrochloric acid aqueous solution for 20 minutes to remove the surface scale, and then rinse with a large amount of deionized water To neutral, dry with high-purity Ar gas;

[0048] 2. Electroplating solution preparation: to analyze pure grade CoSO 4 ·7H 2 O and CoCl 6H 2 O as Co salt, H 3 BO 3 As a pH stabilizer, prepare 230ml electroplating solution with ultrapure water with a resistivity of 18.2MΩ, and control the CoSO in the plating solution 4 ·7H 2 O, CoCl 6H 2 O and H 3 BO 3 The concentrations are 0.5M, 0.2M and 0.1M, respectively.

[0049] 3. Electrodeposition of Co particles: First, under the s...

Embodiment 2

[0055] 1. Electrode material pretreatment: nickel content ≥ 99.5%, thickness 50 microns, area 10 cm 2 The nickel sheet is used as the base material, firstly through 800# and 1200# # Polish the surface with water abrasive paper until the surface is smooth, then soak it in acetone at room temperature for 15 minutes to remove the surface grease; finally soak it in 0.5M hydrochloric acid aqueous solution for 30 minutes to remove the surface scale, and then rinse with a large amount of deionized water To neutral, dry with high-purity Ar gas;

[0056] 2. Electroplating solution preparation: to analyze pure grade CoSO 4 ·7H 2 O and CoCl 6H 2 O as Co salt, H 3 BO 3 As a pH stabilizer, prepare 230ml electroplating solution with ultrapure water with a resistivity of 18.2MΩ, and control the CoSO in the plating solution 4 ·7H 2 O, CoCl 6H 2 O and H 3 BO 3 The concentrations are 0.3M, 0.1M and 0.5M, respectively.

[0057] 3. Electrodeposition of Co particles: First, under the st...

Embodiment 3

[0061] 1. Electrode material pretreatment: nickel content ≥ 99.5%, thickness 1mm, area 10cm 2 The nickel sheet is used as the base material, firstly through 800# and 1200# #Polish the surface with water abrasive paper until the surface is smooth, then soak it in acetone at room temperature for 30 minutes to remove surface grease; finally soak it in 0.5M hydrochloric acid aqueous solution for 30 minutes to remove surface oxide skin, and then rinse with a large amount of deionized water To neutral, dry with high-purity Ar gas;

[0062] 2. Electroplating solution preparation: to analyze pure grade CoSO 4 ·7H 2 O and CoCl 6H 2 O as Co salt, H 3 BO 3 As a pH stabilizer, prepare 230ml electroplating solution with ultrapure water with a resistivity of 18.2MΩ, and control the CoSO in the plating solution 4 ·7H 2 O, CoCl 6H 2 O and H 3 BO 3 The concentrations are 1.0M, 0.5M and 0.3M, respectively.

[0063] 3. Electrodeposition of Co particles: First, under the stirring condi...

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Abstract

The invention relates to an electrode for an alkaline water electrolysis total battery, and a preparation method of the total battery. The total battery comprises a water electrolysis tank body, whichis divided into a cathode cavity and an anode cavity by a diaphragm, wherein the cathode cavity and the anode cavity are not communicated with each other, a cathode and an anode are respectively arranged in the cathode cavity and the anode cavity, the diaphragm is a sulfonated polyetherketone ion exchange membrane, and the anode is a hydrated cobalt-nickel sulfide nanosheet or a hydrated cobalt-nickel sulfide strip generated on the surface of a nickel-based substrate in situ. According to the invention, the electrode with the structure has the characteristics of high surface roughness and large electrochemical reaction area; due to the existence of the two-dimensional nanosheets, electron transfer and substance transfer can be promoted, and more reaction active sites can be provided for water electrolysis reaction, so that the initial potential of OER is reduced, and the speed of the water electrolysis reaction is increased; and the performance of the substrate Ni is stable in an alkaline environment, and the structure of the nickel sulfide is stable due to the doping of the Co element, so that the structure and the catalytic performance of the nickel sulfide are kept stable in the continuous water electrolysis process.

Description

Technical field [0001] The invention belongs to the technical field of alkaline water electrolysis, and particularly relates to separators and electrodes and their preparation technology. Background technique [0002] Humanity is facing increasingly serious environmental pollution problems, and non-renewable fossil fuels are gradually depleting. To solve the above problems, researchers are trying to find clean and sustainable alternatives. As we all know, H 2 It is an ideal chemical fuel with high energy density and has the outstanding advantages of renewable and zero emissions. It has attracted widespread attention from researchers and industry in recent years. Among various hydrogen production pathways, hydrogen production by electrochemical water splitting (electrolysis of water) is a simple and effective method that can achieve sustainable large-scale production. [0003] The water electrolysis reaction can be divided into two half-reactions: the hydrogen evolution rea...

Claims

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Application Information

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IPC IPC(8): C25B1/10C25B11/06C25B13/08C25D3/12C23C18/12B82Y40/00
CPCB82Y40/00C23C18/1204C25B1/04C25B13/08C25D3/12C25B9/73C25B11/075Y02E60/36
Inventor 邱艳玲李先锋袁治章张华民
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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