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Electrolyte material and preparation method thereof

An electrolyte material, high conductivity technology, applied in circuits, fuel cells, electrical components, etc., can solve the shortage of materials with high proton or oxygen ion conductivity, limit the operating temperature of fuel cells, and have great difficulties in commercialization, etc. problem, to achieve the effect of improving carbon monoxide tolerance, improving toxicity, improving performance and lifespan

Active Publication Date: 2019-05-28
YONGXING SPECIAL STAINLESS STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Medium-temperature solid-state fuel cells combine the advantages of high-temperature solid oxide fuel cells and low-temperature proton exchange membrane fuel cells, while discarding some of their disadvantages. A constant temperature system is attached, resulting in high cost, which makes its commercialization very difficult and takes a long time
[0004] The key to the development of medium-temperature fuel cells is to explore electrolyte materials that can work in the temperature range of 150-400 °C, and materials with high proton or oxygen ion conductivity in the medium-temperature range are currently scarce.
In addition many are about water-containing proton conductors, most of which are not sufficient because of the 3 o + Conducting protons requires a large amount of water, and water boils at around 100°C at room temperature, which limits the operating temperature of the fuel cell

Method used

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  • Electrolyte material and preparation method thereof
  • Electrolyte material and preparation method thereof
  • Electrolyte material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Will NH 4 HCO 3 Dissolve in deionized water to form a transparent solution; then drop the above transparent solution into 0.1mol / L H 3 PW 12 o 40 In solution, NH in raw material 4 HCO 3 / H 3 PW 12 o 40 / H 3 PO 4 The molar ratio is 3:1:0, stir vigorously to obtain a uniform mixture, heat the mixture to 200°C and evaporate the excess water; the obtained white powder is dried at 100°C for 13 hours.

[0036] The sample was subjected to XRD test and electron microscope scanning, and the obtained results were as follows: figure 1 , figure 2As shown, from which we can see that the obtained sample is a symmetric cubic single phase with a spherical microstructure, from Figure 4 It can be seen that the conductivity is lower.

Embodiment 2

[0038] The difference from the above examples is that the NH 4 HCO 3 Dissolve in deionized water to form a transparent solution; then drop the above transparent solution into 0.1mol / L H 3 PW 12 o 40 In solution, NH in raw material 4 HCO 3 / H 3 PW 12 o 40 / H 3 PO 4 The molar ratio is 3:1:3, stir vigorously to obtain a uniform mixture, heat to 200°C to evaporate excess water; the obtained white powder is dried at 110°C for 12 hours.

[0039] The sample was subjected to XRD test and electron microscope scanning, and the obtained results were as follows: figure 1 , figure 2 As shown, from which we can see that the obtained sample is a symmetrical cubic single phase, which is shifted to a small angle, indicating that the unit cell is enlarged, phosphoric acid is successfully intercalated, and has a spherical microstructure. from Figure 5 It can be seen that the conductivity is quite different from Example 1.

Embodiment 3

[0041] The difference from the above examples is that the NH 4 HCO 3 Dissolve in deionized water to form a transparent solution; then drop the above transparent solution into 0.1mol / L H 3 PW 12 o 40 In solution, NH in raw material 4 HCO 3 / H 3 PW 12 o 40 / H 3 PO 4 The molar ratio is 3:1:5, stir vigorously to obtain a uniform mixture, heat to 200°C and evaporate the excess water; the obtained white powder is dried at 120°C for 11 hours.

[0042] The sample was subjected to XRD test and electron microscope scanning, and the obtained results were as follows: figure 1 , figure 2 As shown, we can see from it that the obtained sample is a symmetrical cubic single phase, and there is basically no shift compared with Example 2, indicating that phosphoric acid cannot continue to enter the unit cell, but hangs outside the unit cell, with a spherical microstructure. from Figure 5 It can be seen that the conductivity is higher.

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Abstract

The invention belongs to the field of fuel cells, and particularly relates to an electrolyte material and a preparation method thereof. The electrolyte material is (NH4)3PW12O40-xH3PO4, and the preparation method of (NH4)3PW12O40-xH3PO4 comprises the following steps: (1) dissolving NH4HCO3 and H3PO4 in deionized water to form a transparent solution; (2) dropwise adding the transparent solution obtained in the step (1) into an H3PW12O40 solution, and stirring to obtain a uniform mixed solution; (3) heating and evaporating the mixed solution obtained in the step (3) to dryness until the mixed solution becomes white powder; (4) drying the white powder obtained in the step (3) to obtain (NH4)3PW12O40-xH3PO4. The pyrolysis temperature of an anhydrous ammonium phosphotungstate-phosphoric acid complex is 200 DEG C, and the resistance in the complex is not sharply increased due to temperature rise after temperature rise, so that the electrolyte is kept to continuously and effectively work at ahigh temperature, meanwhile, additional temperature control, humidification and pressurization components are omitted, and the cost is saved.

Description

technical field [0001] The invention belongs to the field of fuel cells, and in particular relates to an electrolyte material and a preparation method thereof. Background technique [0002] A fuel cell is a power generation device that directly converts the chemical energy in gaseous fuel into electrical energy through an electrochemical reaction. It has the advantages of less pollution discharge, high energy efficiency, high energy density, compact shape, and convenient movement. According to the nature of the electrolyte, fuel cells can be divided into five categories, alkaline fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC) and proton exchange fuel cells. Membrane fuel cell (PEMFC). Fuel cells are one of the world-recognized green energy technologies. [0003] At present, medium-temperature (150-400°C) solid-state fuel cells are one of the most active areas of fuel cell technology research and devel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/1016
CPCY02E60/50
Inventor 徐晓翔位顺航郑卓群
Owner YONGXING SPECIAL STAINLESS STEEL
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