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Electrolyte material with high conductivity and preparation method thereof

An electrolyte material and high conductivity technology, applied in circuits, fuel cells, electrical components, etc., can solve the problems of increasing battery cost and complexity, increasing battery cost, and large battery resistance, so as to improve anti-toxicity, save cost, The effect of low cost

Active Publication Date: 2020-11-13
YONGXING SPECIAL STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low operating temperature of the proton exchange membrane electrolyte (generally lower than 120°C), the work of the entire battery faces many bottlenecks: First, it relies heavily on noble metal catalysts (platinum, palladium, etc.) as the active material of the electrode, which increases the cost of the battery
The resistance of traditional proton exchange membrane materials such as Nafion rises sharply at medium temperature, causing the internal resistance of the battery to be too large to work, which needs to be solved by increasing the pressure and relative humidity, which in turn will increase the cost and complexity of the battery
And in order to ensure the work efficiency, the workpiece condition of the existing electrolyte material must be lower than 100 degrees, which requires very fine temperature control equipment, high cost and difficult to control

Method used

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  • Electrolyte material with high conductivity and preparation method thereof
  • Electrolyte material with high conductivity and preparation method thereof
  • Electrolyte material with high conductivity and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Dissolve the phosphotungstic heteropoly acid with water in deionized water to form a transparent solution; heat the solution to 200°C to evaporate the excess water, and keep stirring during the evaporation until white powder appears; dry the white powder at 90°C for 2 hours .

[0030] This sample is carried out XRD test and scanning electron microscope, and the result that obtains is respectively as 1, figure 2 As shown, from which we can see that the obtained sample is a symmetric cubic single phase with a disordered microstructure. From image 3 It can be seen that the conductivity is the least ideal.

Embodiment 2

[0032] The difference from the above examples is that there are water phosphotungstic heteropolyacid and H 3 PO 4 Dissolve in deionized water at a molar ratio of 1:1 to form a transparent solution; heat the above solution to 200°C to evaporate excess water, and keep stirring during evaporation until a white powder appears; dry the resulting white powder at 100°C for 3 hours.

[0033] This sample is carried out XRD test and scanning electron microscope, and the result that obtains is respectively as 1, figure 2 and image 3 As shown in , we can see that the obtained sample is a single phase of symmetrical cubic, which is shifted to a small angle, indicating that the unit cell is enlarged, phosphoric acid is successfully intercalated, and the microstructure becomes orderly. image 3 A significant increase in conductivity can be seen.

Embodiment 3

[0035] The difference from the above examples is that there are water phosphotungstic heteropolyacid and H 3 PO 4 Dissolve in deionized water at a molar ratio of 1:2 to form a transparent solution; heat the above solution to 200°C to evaporate excess water, and keep stirring during evaporation until a white powder appears; dry the resulting white powder at 120°C for 2 hours.

[0036] This sample is carried out XRD test and scanning electron microscope, and the result that obtains is respectively as 1, figure 2 and image 3 As shown, we can see that the obtained sample is a single phase of symmetrical cubic, and further shifted to a small angle, indicating that the unit cell is further enlarged, more phosphoric acid is successfully intercalated, and the microstructure becomes orderly. image 3 It can be seen that the conductivity is good.

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Abstract

The invention belongs to the field of the fuel cell, and specifically relates to an electrolyte material with high conductivity and a preparation method thereof. The electrolyte material is H3PW12O40-xH3PO4, the preparation method of the H3PW12O40-xH3PO4 comprises the following steps: (1) dissolving H3PW12O40.xH2O and H3PO4 in deionized water to form transparent solution; (2) heating the transparent solution obtained in the step one to evaporate excessive moisture until the transparent solution becomes white powder; (3) drying the white powder obtained in the step two for 2h to obtain H3PW12O40-xH3PO4. The mole ratio of the H3PW12O40.xH2O to the H3PO4 is 1: 1 to 1: 3. The pyrolysis temperature of anhydrous phosphotungstic heteropoly acid-phosphoric acid complex is at 150 DEG, the sharp increase of the resistance therein cannot be caused by the temperature rise after rising the temperature, thereby maintaining the continuous and effective work of the electrolyte at high temperature; andmeanwhile, the operations for adding a temperature control component, a humidification component and a pressurizing component is avoided, and the cost is saved.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to a high-conductivity electrolyte material and a preparation method thereof. Background technique [0002] The single cell structure of proton exchange membrane fuel cell stack (PEMFC) is composed of gas diffusion components, electrodes and proton exchange membrane electrolyte. Due to the low operating temperature of the proton exchange membrane electrolyte (generally lower than 120°C), the work of the entire battery faces many bottlenecks: First, it relies heavily on noble metal catalysts (platinum, palladium, etc.) as the active material of the electrode, which increases the cost of the battery . Second, the fuel purity requirements are high. Again, complicated heat dissipation devices and the like are required. The existence of these bottleneck problems is not conducive to the large-scale application of fuel cells. An effective method is to develop fuel cells with highe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M8/0668H01M8/1009
CPCY02E60/50
Inventor 徐晓翔位顺航杨鸿超朱玉海
Owner YONGXING SPECIAL STAINLESS STEEL