Preparation method and application of attapulgite fluid composite alkaline polyelectrolyte membrane

The invention relates to the technical field of fuel cells, and particularly discloses a preparation method of an attapulgite fluid composite alkaline polyelectrolyte membrane, which comprises the following steps: (1) preparing an attapulgite fluid; (2) dissolving quaternized chitosan and polyvinyl alcohol to obtain a mixed membrane casting solution; and (3) filling the mixed membrane casting solution with the attapulgite fluid, and taking glutaraldehyde as a cross-linking agent to obtain the attapulgite fluid composite alkaline polyelectrolyte membrane. When the molecular structure of the attapulgite fluid is designed, the cation layer with the anion exchange function is grafted on the outer layer, the activity capacity of cations on the outer layer of the attapulgite fluid is higher, a more continuous channel is constructed for transmission of hydroxyl ions, and the conduction capacity of the composite membrane to anions is remarkably improved. The composite membrane has high ionic conductivity and excellen