Preparation method of gel electrolyte for electrochemical oxygen alarming device

A gel electrolyte and alarm technology, applied in the field of electrochemistry, can solve the problems of low ionic conductivity, easy coagulation, and easy drying, and achieve the effect of overcoming insufficient mechanical strength, strong output signal, and stable properties.

Inactive Publication Date: 2016-02-03
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to provide a preparation method of a gel electrolyte used in an electrochemical oxygen alarm device, which is used to solve the problem that the liquid electrolyte used in the primary battery type electrochemical oxygen alarm device in the prior art is easy to dry up, and the operating temperature Narrow range, easy to solidify at low temperature, low ion conductivity, easy to leak, easy to cause safety problems, corrosion of electrodes and other technical problems

Method used

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  • Preparation method of gel electrolyte for electrochemical oxygen alarming device

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preparation example Construction

[0020] As shown in the figure, a method for preparing a gel electrolyte for an electrochemical oxygen alarm device is characterized in that it includes the following steps,

[0021] Step 1, prepare the aqueous solution of KOH, NaOH or LiOH

[0022] Weigh KOH3.36g~56g, NaOH2.4g~40g or LiOH2.51g~42g, dissolve in 60mL~100mL distilled water to prepare 1mol / L~10mol / L KOH, NaOH or LiOH aqueous solution;

[0023] Step 2. Dissolving the organic polymer

[0024] Weigh 2g ~ 15g of organic polymer and slowly add it to the aqueous solution of KOH, NaOH or LiOH obtained in step 1, stir while adding, continue stirring for 3min ~ 5min after the addition, after the organic polymer is completely dissolved, let it stand for 24 hours, to obtain a gel electrolyte with an organic polymer content of 2% to 15%;

[0025] Step three, add inorganic additives

[0026] According to the amount of the organic polymer added in step 2, add the inorganic additive to the gel electrolyte obtained in step 2 a...

Embodiment 1

[0032] Weigh 20.16g KOH and dissolve in 60mL distilled water to prepare 6mol / L KOH aqueous solution;

[0033] Weigh 5g of sodium polyacrylate and slowly add it to the above 6mol / L KOH aqueous solution, stir while adding, continue to stir for 3-5 minutes after the addition, until the sodium polyacrylate is completely dissolved, and let it stand for 24 hours to prepare 11.6wt% gel electrolyte;

[0034] After the gel is formed, slowly add sodium acrylate and lithium magnesium silicate into the gel electrolyte prepared above in a ratio of 4:1, and stir while adding, and continue stirring for 3 minutes after the addition is complete, so that the lithium magnesium silicate is mixed Evenly, let stand for 12h;

[0035] The obtained mixture was placed in a closed container, and the closed container was left to defoam in a water bath at room temperature for 3 hours to obtain a gel electrolyte for an electrochemical oxygen alarm device.

Embodiment 2

[0037] Weigh 20.16g KOH and dissolve in 60mL distilled water to prepare 6mol / L KOH aqueous solution;

[0038] Weigh 3g of potassium polyacrylate and slowly add it to the above 6mol / L KOH aqueous solution, stir while adding, continue to stir for 3-5 minutes after the addition, until the potassium polyacrylate is completely dissolved, and let it stand for 24 hours to prepare a 7.2wt% gel electrolyte;

[0039] After the gel is formed, slowly add sodium acrylate and diatomaceous earth to the gel electrolyte prepared above at a ratio of 4:1, and stir while adding, and continue stirring for 5 minutes after the addition, so that the diatomite is evenly mixed , stand still for 12h;

[0040] The obtained mixture was placed in a closed container, and the closed container was left standing in a water bath at room temperature for degassing for 4 hours, so as to obtain a gel electrolyte for an electrochemical oxygen alarm device.

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Abstract

The invention provides a preparation method of a gel electrolyte for an electrochemical oxygen alarming device, and belongs to the technical field of electrochemistry. The preparation method comprises the four steps of preparing a water solution of KOH, NaOH or LiOH, dissolving organic polymers, adding inorganic additives and performing still standing defoaming. The preparation method has the advantages that a blending method is adopted for preparing the organic polymer gel electrolyte used for an oxygen sensor. The electrolyte works under the neutral or weak alkaline conditions, and better activity is realized on the oxygen electrochemical reduction, so that the output signal of the oxygen sensor is stronger. The original polymer gel electrolyte prepared by the method has higher conductivity, and has a 1.5V electrochemical stabilization window; meanwhile, the property is stable; the defect that the ordinary gel intensity is insufficient is overcome.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and in particular relates to a preparation method of a gel electrolyte used in an electrochemical oxygen alarm. Background technique [0002] The basic measuring element of an electrochemical oxygen sensor is an electrochemical cell comprising at least two electrodes in contact with an electrolyte. The cell is in contact with the oxygen to be analyzed, which can flow to one of the electrodes where it is electrochemically converted by the catalysis of the sensitive material. The current generated by this conversion is directly proportional to the amount of gas present. Signals that can be used to provide detection and alarms are generated from this current. [0003] The oxygen sensor based on the electrochemical principle has the advantages of high sensitivity and good selectivity. The electrolyte is one of its key components, and its main function is to provide charge transfer for the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/26H01M10/26
CPCG01N27/26H01M10/26Y02E60/10
Inventor 孙成勋陈涛朱宝余王鑫
Owner STATE GRID CORP OF CHINA
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