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Proton exchange membrane of ordered ion transmission channel and preparation method of proton exchange membrane

A proton exchange membrane and ion transport technology, which is applied in the field of fuel cells, can solve the problems of catalyst poisoning, proton exchange membrane mechanical performance degradation, loss, etc., and achieve the effects of avoiding acid loss, increasing proton conductivity, and improving stability

Pending Publication Date: 2022-07-12
BEIJING SINOHYTEC
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the acid inside the proton exchange membrane will continue to be lost during use, which will poison the catalyst. If it is doped too much, it will reduce the mechanical properties of the proton exchange membrane

Method used

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  • Proton exchange membrane of ordered ion transmission channel and preparation method of proton exchange membrane
  • Proton exchange membrane of ordered ion transmission channel and preparation method of proton exchange membrane
  • Proton exchange membrane of ordered ion transmission channel and preparation method of proton exchange membrane

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preparation example Construction

[0030] The present invention provides a preparation method of a proton exchange membrane with an ordered ion transport channel, which mainly comprises the following steps:

[0031] S1: Electrospinning preparation of coaxial multilayer fibers is carried out through a coaxial spinning tube on one side of the spinning receiving roll, while electrospinning preparation of reinforcing fibers is carried out through a single-layer spinning tube. The fibers and the reinforcing fibers are interwoven on the spinning receiving roll, and dried to form a composite fiber porous membrane;

[0032] S2: filling the voids of the composite fiber porous membrane with a pore blocking agent, the pore blocking agent comprising a perfluorosulfonic acid resin solution, reinforcing fibers and a quenching agent;

[0033] S3: hot pressing and flattening to obtain a proton exchange membrane with ordered ion transport channels.

[0034] In step S1, the coaxial spinning tube and the single-layer spinning tu...

Embodiment 1

[0037] like figure 1 As shown, the coaxial spin tube 1 has a shell channel and an inner channel arranged coaxially. The shell layer channel is supplied with sulfonated naphthalene polybenzimidazole solution as the shell layer spinning solution, and the inner layer channel is supplied with phosphoric acid solution as the inner layer spinning solution. The single-layer spinning solution in the single-layer spinning tube 2 consists of a perfluorosulfonic acid resin solution. By placing the coaxial spinning tube 1 and the single-layer spinning tube 2 on the same side of the spinning take-up roll 3 for simultaneous co-spinning, the coaxial multi-layer fiber prepared by the coaxial spinning tube 1 and the single-layer spinning The reinforcing fibers prepared by the tube 2 are interwoven into a network structure, and the composite fiber porous membrane is obtained after drying and removing the solvent.

[0038] The ion channel of the coaxial multilayer fiber obtained by the above m...

Embodiment 2

[0042] This embodiment is similar to Embodiment 1, in that the coaxial spinning tube has a shell channel and an inner channel arranged coaxially. Phosphorylated benzimidazole solution was used as the shell layer spinning solution in the shell layer channel, and perfluorosulfonic acid resin solution was used as the inner layer spinning solution in the inner layer channel. The single-layer spinning solution in the single-layer spinning tube consists of a perfluorosulfonic acid resin solution.

[0043] After the composite fiber porous membrane is obtained, the voids of the composite fiber porous membrane are filled by screen printing using a pore blocking agent. The pore blocking agent includes a perfluorosulfonic acid resin solution, reinforcing fibers and a quenching agent; specifically, sulfonated polyether ether ketone is used as the reinforcing fiber, and manganese oxide is used as the quenching agent.

[0044] Finally, the proton exchange membrane with the ordered ion tran...

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Abstract

The invention provides a proton exchange membrane with an ordered ion transmission channel and a preparation method of the proton exchange membrane. The preparation method comprises the following steps: synchronously co-spinning coaxial multi-layer fibers and reinforced fibers through an electrostatic spinning method to obtain a composite fiber porous membrane, filling gaps of the composite fiber porous membrane with a pore blocking agent containing perfluorosulfonic acid resin and fibers, and carrying out hot pressing, leveling and other treatments to obtain the proton exchange membrane with ordered ion transmission channels. The proton exchange membrane prepared by the invention has good mechanical strength, and has good conductivity and stability in both high-temperature and low-temperature scenes.

Description

technical field [0001] The invention belongs to the technical field of fuel cells, and in particular relates to a proton exchange membrane with ordered ion transport channels and a preparation method thereof. Background technique [0002] Proton exchange membrane fuel cell (PEMFC) is one of the most promising electric energy sources in electric vehicles. It consists of end plates, insulating plates, current collectors, bipolar plates, and membrane electrodes. As the core of the fuel cell stack, the membrane electrode is the place where the electrochemical reaction occurs. Inside the membrane electrode, the hydrogen molecules on the anode side lose electrons and become protons under the action of the catalyst, and the protons pass through the selective proton exchange membrane to reach the cathode. On the other hand, under the action of the cathode catalyst, electrons are obtained and combined with oxygen molecules to form water molecules. [0003] Proton exchange membranes ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/0245H01M8/1018H01M8/1069H01M8/0204H01M8/0221H01M8/0228
CPCH01M8/0245H01M8/1018H01M8/1069H01M8/0204H01M8/0221H01M8/0228Y02E60/50
Inventor 万贺廷方川汪如意袁殿赵兴旺李飞强
Owner BEIJING SINOHYTEC
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