A large-area two-dimensional polymer nanosheet-based proton exchange membrane and a preparation method thereof

By introducing an intercalating agent into a two-dimensional polymer nanosheet membrane to prepare a large-area composite membrane, the problems of nanosheet rigidity and electrostatic repulsion were solved, and a membrane with high stability and excellent proton conductivity was prepared, which is suitable for devices such as fuel cells.

CN119144028BActive Publication Date: 2025-12-16HAINAN UNIV
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Patent Information

Application Number
CN202411407175.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-10-10
Publication Date
2025-12-16
Estimated Expiration
2044-10-10

AI Technical Summary

Technical Problem

When preparing large-area ionic two-dimensional polymer nanosheet films, there are problems such as crack generation caused by the rigid structure of the nanosheets and reduced electrostatic repulsion. In addition, existing methods limit the size of the film, resulting in instability of the film in an aqueous environment.

Method used

An intercalation strategy was adopted, using ionic 2DP nanosheets as the main membrane material and adding ionic polyelectrolytes as intercalating agents to prepare large-area 2DP-polyelectrolyte composite membranes by casting. This enhanced the interfacial interaction between nanosheets and improved the flexibility and stability of the membrane.

Benefits of technology

A large-sized (400 cm²) 2DP-polyelectrolyte composite PEM with excellent stability and extremely high proton conductivity was prepared, which is suitable for energy conversion devices such as fuel cells.

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Abstract

The application discloses a large-area two-dimensional polymer (2DP) nanosheet matrix proton exchange membrane (PEM), which is prepared by using ionic 2DP nanosheets as a main membrane material, adding ionic polyelectrolyte as an intercalation agent, and then mixing and preparing the large-area PEM by a flow casting method. The 2DP nanosheet solution is synthesized by using a step-by-step single-phase polymerization method, and then the polyelectrolyte is dissolved in a suitable solvent, mixed with the 2DP nanosheet solution according to a certain proportion, and a 2DP-polyelectrolyte composite membrane is prepared by a flow casting method. The preparation method is simple, controllable and convenient to operate. The prepared large-area 2DP-polyelectrolyte composite PEM has large size (400cm 2 ), excellent stability and extremely high proton conduction capacity.
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