Proton exchange membrane as well as synthesis method and application thereof

Abstract

The invention discloses a novel proton exchange membrane prepared by hanging protonic acid-containing acid group ions on a long / short side chain at the same time. The structural design has the advantages that the protonic acids hung on the long / short side chain exist in the proton exchange membrane at the same time, and the distribution area of protons in the proton exchange membrane is expanded. After the protonic acid-containing acid group ions absorb water molecules, a proton transfer channel can be enlarged. The proton exchange membrane disclosed by the invention has the following beneficial effects: through the structural design, a continuous and clear proton transfer channel in the proton exchange membrane can be established better, and the proton conductivity is improved; by applying the proton exchange membrane to a fuel cell, the energy density and the energy conversion efficiency of the fuel cell are remarkably improved.

Description

technical field [0001] The invention relates to a proton exchange membrane material that can be used in fuel cells, in particular to the structural design and specific implementation examples of a proton exchange membrane that simultaneously suspends acid radical ions containing protonic acids on long and short side chains. Background technique [0002] The development of new materials (such as catalysts and exchange membranes) and the design of new device models are major challenges in the development of proton exchange membrane fuel cells (Proton Exchange Membrane Fuel Cells, PEMFCs). Proton exchange membrane (PEM) is one of the most critical components of proton exchange membrane fuel cells, requiring high proton conductivity, sufficient water absorption, and moderate swelling rate. Perfluorosulfonic acid proton exchange membranes, such as meet the above requirements, but It has the disadvantages of reduced proton conductivity at lower humidity, electroosmosis to wate...

AI Technical Summary

Problems solved by technology

However, the non-fluorosulfonic acid membrane has the problem of low proton conductivity under the same ion exchange capacity (ion exchange capacity, IEC).

An effective way to improve the proton conductivity is to increase the content of proton acid in the proton exchange membrane (IEC value), but high IEC will cause excessive water absorption and severe swelling, and even the dissolution of the membrane at high temperature

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