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In-situ regeneration method of solid polymer electrolyte water electrolyzer

A solid polymer, in-situ regeneration technology, applied in the electrolysis process, electrolysis components, etc., can solve the problems of heavy workload, achieve low cost, improve regeneration efficiency, and restore performance

Inactive Publication Date: 2016-05-25
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

In the past, the electrolytic cell was disassembled and each electrode was cleaned separately, but the workload was too large

Method used

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  • In-situ regeneration method of solid polymer electrolyte water electrolyzer
  • In-situ regeneration method of solid polymer electrolyte water electrolyzer
  • In-situ regeneration method of solid polymer electrolyte water electrolyzer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1 adopts the water pump circulation cleaning mode, at first 4MH 2 o 2 Pass the solution into the anode of the SPE water electrolysis cell for 7 hours, then clean the anode and cathode of the electrolysis cell with pure water for 8 hours, repeat the above steps 5 times, then measure the performance of the electrolysis cell after regeneration, and compare the V-I curves before and after regeneration, as shown in figure 2 As shown, the electrolytic cell is at 500mAcm before regeneration -2 The voltage of the battery is 1.77V, and it is 1.65V after regeneration, and the performance of the electrolytic cell is improved by 120mV, so this method can restore the performance of the electrolytic cell to a large extent.

Embodiment 2

[0025] Embodiment 2 adopts the siphon static cleaning method, passes 4.5M hydrochloric acid aqueous solution into the anode and cathode of the SPE water electrolysis cell, soaks the SPE water electrolysis cell for 24 hours, repeats 4 times; then cleans with pure water for 8 hours, repeats 5 times. Then proceed to the electrolytic cell life experiment, such as image 3 shown, constant current density 1000mAcm -2 Running, the voltage is reduced from 1.95V to 1.75V, and the performance is basically stable until 450h, which shows that this method can restore the performance of the electrolytic cell to a large extent.

[0026] The above examples illustrate that the regeneration method of the present invention can prolong the life of the SPE water electrolysis cell, reduce the operating cost of the SPE water electrolysis cell, and is of great significance for promoting the marketization process of the SPE electrolysis cell.

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Abstract

The invention relates to an in-situ regeneration method of a solid polymer electrolyte (SPE) water electrolyzer. The method comprises the following steps: in the case that the water electrolyzer is not dismounted, a 0.1-5mol / L cleaning solution enters the solid polymer electrolyte (SPE) water electrolyzer, cleaning is carried out for 0.01-30 hours, the process is repeated for 1-10 times, cleaning is carried out again with purified water or deionized water for 0.1-30 hours, the process is repeated for 1-10 times, and performance of the electrolyze is recovered; the cleaning solution is an acidic solution or an alkaline solution, wherein the acidic solution comprises one or more than two solutions which are selected from an aqueous solution of H2O2, an aqueous solution of hydrochloric acid, an aqueous solution of sulfuric acid or an aqueous solution of nitric acid, the alkaline solution comprises one or more than two solutions which are selected from ammoniacal liquor, an aqueous solution of sodium hydroxide, and an aqueous solution of potassium hydroxide. The electrolyzer is not dismounted, the operation is simple, and the performance of the electrolyze is rapidly recovered, so that the method has important meanings for prolonging service life of the SPE water electrolyzer, and promoting marketalization process of the SPE water electrolyzer.

Description

technical field [0001] The invention belongs to the technical field of solid polymer electrolyte water electrolysis, and in particular relates to an in-situ regeneration method of a solid polymer electrolyte water electrolysis cell. Background technique [0002] At present, the alkaline electrolytic cell is still the mainstream of the electrolytic hydrogen production technology, but due to its high pollution, low gas purity, high energy consumption, large volume, and alkali leakage of the electrolytic cell and many other shortcomings, it is urgent to upgrade the electrolytic technology. The solid polymer electrolyte (SPE) water electrolysis cell technology has many advantages such as high gas purity, environmental protection, low energy consumption, and small size. Therefore, many hydrogen production companies and scientific research institutions in the world are committed to developing solid polymer electrolyte (SPE) water. Electrolytic cell technology. But the life of SPE...

Claims

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Application Information

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IPC IPC(8): C25B15/08C25B1/04
CPCY02E60/36
Inventor 俞红梅孙树成邵志刚韦世慧
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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