A titanium-based pore-forming agent and its application in fuel cells

A fuel cell and slurry technology that is applied to battery electrodes, circuits, electrical components, etc., to slow down the attenuation of specific capacity, improve output performance, and increase the electrochemical reaction area.

Active Publication Date: 2021-11-19
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 anodes, the microstructure of the anode has been significantly improved, but there is still a large room for digging the potential of the anode

Method used

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  • A titanium-based pore-forming agent and its application in fuel cells
  • A titanium-based pore-forming agent and its application in fuel cells
  • A titanium-based pore-forming agent and its application in fuel cells

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1 (best example): the preparation method of the anode of the present invention:

[0035] S1. Preparation of anode primary powder: pre-fire the nickel-containing metal oxide powder at 600°C for 2 hours, and 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 of YSZ and YSZ is 1:1; the nickel-containing metal oxide is NiO or Ni 2 o 3 one or a mixture of both;

[0036] S2, preparation of TiO 2 -PAN-PVP coaxial composite fiber:

[0037] First, mix 34mL of butyl phthalate with 136mL of absolute ethanol and stir to form solution A. Then, mix 34mL of deionized water and 34mL of absolute ethanol, and add concentrated nitric acid dropwise to make the pH value 3 to form solution B. Then add solution A dropwise to the prepared solution B at 25°C, at a rate of 2 drops / second, and at the same time use a constant temperature magnetic stirrer to stir vigorously...

Embodiment 2-10

[0042] Embodiment 2-10: the preparation method of fuel cell anode of the present invention:

[0043] S1, prepare anode initial powder: same as embodiment 1;

[0044] S2, preparation of TiO 2 -PAN-PVP coaxial composite fiber: the steps are the same as in Example 1, and the specific experimental parameters are designed as shown in Table 1;

[0045] S3, anode initial powder and TiO 2 -PAN-PVP coaxial composite fiber mixing: with embodiment 1;

[0046] S4, prepare anode: with embodiment 1;

[0047] Table 1 Comparison of preparation process parameters of each embodiment

[0048]

Embodiment 11

[0049] Embodiment 11 Electrochemical performance test

[0050] The anodes prepared in the above examples are used to prepare an anode 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 above-mentioned fuel cell anode The center of the outer surface of one side, 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 anode driven by the glue homogenizer makes the electrolyte slurry evenly coated on the outer surface of the anode side, and then the anode with a layer of electrolyte slurry is dried at 400 ° C After drying, continue to 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, and finally the anode with a total of three layers of electrolyte film is heat...

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Abstract

The invention relates to a titanium-based pore-forming agent and its application in fuel cells. The pore-forming agent is prepared by using butyl titanate or tetrabutyl titanate, polyacrylonitrile and polyvinylpyrrolidone as raw materials TiO 2 ‑PAN‑PVP coaxial composite fiber, which is prepared by preparing butyl titanate or tetrabutyl titanate into TiO 2 Sol, polyacrylonitrile and polyvinylpyrrolidone are prepared as PAN-PVP mixed solution, and then operated on a coaxial high-voltage electrospinning machine, the inner pinhole is placed with PAN-PVP mixed solution, and the outer pinhole is placed with TiO 2 Sol, rotating drum collector to collect TiO 2 ‑PAN‑PVP coaxial composite fiber, in the process of preparing the anode, after removing the fiber by high pressure heating, TiO 2 Remains in the channel, which helps to improve the connection of the anode inside the hole; TiO 2 It is nano-particles with a large specific surface area, which can increase the electrochemical reaction area; reduce the activation polarization of the battery as a whole, reduce the internal resistance of the battery, and accelerate the diffusion of substances, thereby ultimately improving the output performance of the battery and slowing down the attenuation of the specific capacity.

Description

technical field [0001] The invention relates to the field of batteries, in particular to a titanium-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 a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/10D01F8/18D01F1/10H01M4/86H01M4/88
CPCD01F1/10D01F8/10D01F8/18H01M4/8605H01M4/88H01M4/8875H01M4/8885Y02E60/50
Inventor 赵金保李雪曾静
Owner XIAMEN UNIV
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