The application relates to the technical field of liquid flow batteries, and discloses a high-stability flow channel plate, a preparation method thereof and a liquid
flow battery, which comprises the following steps:
processing and shaping a conductive plate material, and performing
plasma pretreatment to introduce active groups on the surface of the conductive plate material, so as to obtain a pre-oxidized flow channel plate; preparing film-forming
slurry, wherein the film-forming
slurry comprises a
solvent, a dispersing agent, a perfluoroalkyl phosphonic acid and a conductive agent; soaking the pre-oxidized flow channel plate in the film-forming
slurry, and performing a self-
assembly reaction under light-proof conditions, so that the perfluoroalkyl phosphonic acid is chemically bonded with the active groups on the surface of the pre-oxidized flow channel plate through phosphonic acid groups, and the conductive agent is distributed in a hydrophobic film layer formed by the perfluoroalkyl phosphonic acid, so as to construct a hydrophobic conductive
composite film; and cleaning and
drying the flow channel plate after the reaction, so as to obtain the high-stability flow channel plate. The application has the advantages of
high conductivity,
hydrolysis resistance, acid and alkali resistance, high-
temperature resistance, blistering resistance and low cost.