Nickel-based pore-forming agent and application thereof in fuel cell

A fuel cell and pore-forming agent technology, which is applied to battery electrodes, circuits, electrical components, etc., to achieve the effects of enhancing electrochemical activity, increasing the electrochemical reaction area, and accelerating material diffusion

Active Publication Date: 2021-05-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Dr. Pan Weiping from Harbin Institute of Technology used electrospinning technology in his thesis "Study on the Influence of Anode Pores and Interface Microstructure on Electrode Polarization and Performance of SOFC", and introduced NiO-containing anode initial powder in the fiber collection process to obtain a more ideal Compared with the existing fuel electrode, the microstructure of the fuel electrode has been significantly improved, but there is still a large room for excavation of the potential of the fuel electrode

Method used

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  • Nickel-based pore-forming agent and application thereof in fuel cell
  • Nickel-based pore-forming agent and application thereof in fuel cell
  • Nickel-based pore-forming agent and application thereof in fuel cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Embodiment 1 (best example): the preparation method of anode of the present invention:

[0029] S1. Preparation of anode primary powder: pre-calcine the nickel-containing metal oxide powder at 600°C for 2 hours, then mix and grind it with 8% mol YSZ electrolyte powder for 2 hours to obtain the anode primary powder, in which the nickel-containing metal oxide The mass ratio to YSZ is 1:1; the nickel-containing metal oxide is NiO;

[0030] S2. Preparation of Ni-PVA electrospun fibers: Dissolve 1g of nickel acetate dihydrate and 1g of PVA in 20mL of dimethylformamide, stir at 45°C for 12h at a stirring speed of 150r / min to make a precursor solution; Operated on an electrospinning machine, the spinning speed of the injector is 2μms -1 , the distance between the collecting drum and the spinning nozzle is 15cm, and the voltage is 22kV; the drum collector is made of aluminum sheet and copper wire, and it takes 30rmin to -1 The speed drives the drum to rotate to collect Ni-PVA...

Embodiment 2-15

[0033] Embodiment 2-15: The preparation method of the fuel cell anode of the present invention:

[0034] S1, prepare anode initial powder: same as embodiment 1;

[0035] S2. Preparation of Ni-PVA electrospun fibers: the steps are the same as in Example 1, and the process parameters are designed in Table 1;

[0036] S3, mixing the anode initial powder and the Ni-PVA electrospun fiber: same as Example 1;

[0037] S4. Preparation of fuel cell anode: same as in Example 1.

[0038] The preparation process parameter contrast of each embodiment of table 1

[0039]

[0040]

Embodiment 16

[0041] Embodiment 16 electrochemical performance test

[0042] The fuel cell anodes prepared in the above examples are used to prepare fuel cell anodes coated with a solid electrolyte on one side. The method is as follows: first prepare the electrolyte slurry, and then use the slurry spin coating method to place a drop of the electrolyte slurry on the In the center of the outer surface of the anode side of the above-mentioned fuel cell, the speed of the homogenizer is 6000r min -1 , the running time is set to 60s, and the centrifugal force generated by the high-speed rotation of the fuel electrode driven by the glue homogenizer makes the electrolyte slurry evenly coated on the outer surface of the fuel cell anode side, and then the fuel cell anode with a layer of electrolyte slurry attached is placed at 400 After drying, spin-coat the second layer and the third layer on the formed first layer of electrolyte film. Each layer must be dried at 400°C. Finally, there will be a tota...

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Abstract

The invention relates to a nickel-based pore-forming agent and application thereof in a fuel cell. The pore-forming agent is Ni-PVA electrostatic spinning fiber prepared from polyvinyl alcohol and nickel acetate dihydrate as raw materials. A preparation method comprises the following steps of dissolving the nickel acetate dihydrate and the PVA in a solvent to prepare a precursor solution, then performing operation on a high-voltage electrostatic spinning machine, and rotating a roller collector to collect the Ni-PVA electrostatic spinning fiber. A method for preparing a positive electrode of the fuel cell from the Ni-PVA electrostatic spinning fiber comprises the following steps of preparing fuel electrode initial powder, preparing the Ni-PVA electrostatic spinning fiber, mixing the fuel electrode initial powder with the Ni-PVA electrostatic spinning fiber, and preparing a fuel electrode self-supporting body. The nickel element is introduced into the PVA electrostatic spinning precursor solution, so that the electrochemical relationship and morphology between the PVA fiber and the nickel-containing fuel electrode initial powder are improved, the electrochemical activity of an electrochemical reaction interval is further enhanced, the output performance of the fuel cell is improved, and the attenuation of the specific capacity of the fuel cell is slowed down.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a nickel-based pore-forming agent and its application in fuel cells. [0002] technical background [0003] A fuel cell is a chemical device that directly converts the chemical energy of fuel into electrical energy, also known as an electrochemical generator. It is the fourth power generation technology after hydropower, thermal power and atomic power. Since the fuel cell converts the Gibbs free energy in the chemical energy of the fuel into electrical energy through an electrochemical reaction, it is not limited by the Carnot cycle effect, so the efficiency is high; in addition, the fuel cell uses fuel and oxygen as raw materials; at the same time There are no mechanical transmission parts, so there is no noise pollution, and the emission of harmful gases is very small. It can be seen that from the point of view of saving energy and protecting the ecological environment, fuel cells are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/50D01F1/10H01M4/86H01M4/88
CPCD01F1/10D01F6/50H01M4/8605H01M4/88H01M4/8875H01M4/8885Y02E60/50
Inventor 赵金保李雪曾静
Owner XIAMEN UNIV
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