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An alkaline water electrolysis full battery

A water electrolysis cell, full battery technology, applied in the direction of electrolysis components, electrolysis process, electrodes, etc., can solve the problem of difficult to achieve high-efficiency catalysis, and achieve the goal of promoting electron transfer and material transfer, stable performance, and reducing initial potential. Effect

Active Publication Date: 2021-07-23
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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  • An alkaline water electrolysis full battery
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  • An alkaline water electrolysis full 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 full battery and a preparation method thereof. The full battery includes a water electrolysis cell body, and the water electrolysis cell body is separated into a cathode cavity and an anode cavity which are not connected to each other by a diaphragm. The cavity and the anode cavity are respectively equipped with a cathode and an anode, and the diaphragm is a sulfonated polyether ketone ion exchange membrane; the anode is a hydrated cobalt-nickel sulfide nanosheet or a hydrated cobalt-nickel sulfide strip formed in situ on the surface of the nickel-based substrate bring. The electrode with this structure has the characteristics of high surface roughness and large electrochemical reaction area. The existence of two-dimensional nanosheets can not only promote electron transfer and material transport, but also provide more reactive sites for water electrolysis reactions. Thereby reducing the onset potential of OER and increasing the speed of water electrolysis reaction. Since the substrate Ni is relatively stable in an alkaline environment, the incorporation of Co elements makes the structure of nickel sulfide more stable, thereby maintaining its structure and catalytic performance during continuous water electrolysis.

Description

technical field [0001] The invention belongs to the technical field of alkaline water electrolysis, and particularly relates to a diaphragm, an electrode and a preparation technology therein. Background technique [0002] Human beings are facing increasingly serious environmental pollution problems, and non-renewable fossil fuels are gradually being exhausted. To solve the above problems, researchers are trying to find clean and sustainable alternatives. As we all know, H 2 As an ideal chemical fuel with high energy density, it has the outstanding advantages of being renewable and zero-emission, and has attracted extensive attention from researchers and industries in recent years. Among various hydrogen production methods, hydrogen production by electrochemical water splitting (electrolysis of water) is a simple and effective method that can achieve sustainable large-scale. [0003] The water electrolysis reaction can be divided into two half-reactions: the hydrogen evolut...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25B1/04C25B11/052C25B11/075C25B13/08C25D3/12C23C18/12B82Y40/00
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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