Novel metal bipolar plate surface modification method

Abstract

The invention discloses a novel metal bipolar plate surface modification method. The method comprises the following steps of step 1, carrying out electrolytic polishing treatment on a metal bipolar plate; step 2.1, fully grinding the mixture of titanium, aluminum and graphite together with sodium chloride or potassium chloride, pouring the mixture into an alumina crucible, carrying out heat preservation treatment in an argon protection environment under a high-temperature condition, cooling to room temperature, taking out the mixture, and grinding again to obtain MAX-phase Ti2AlC3; step 2.2, grinding the mixture of Ti2AlC3 and zinc chloride, putting the mixture into the aluminum oxide crucible, carrying out high-temperature heat preservation treatment in the argon protection environment, taking out the mixture, washing the mixture with deionized water to remove redundant zinc chloride, and finally, drying the mixture at 40 DEG C to obtain an MXene-phase Ti3ZnCl2 material; and step 3, spraying a prepared Ti3ZnCl2 MXene solution to the surface of the polished metal bipolar plate through an electronic spraying device under high pressure to obtain the surface-modified metal bipolar plate. A layer of MXene material is electrically sprayed on the metal surface, so that the corrosion resistance and the contact resistance of the metal surface are improved again, and the performance andthe service life of PEMFC are improved.

Description

technical field [0001] The invention relates to the technical field of battery manufacturing, in particular to a method for modifying the surface of a novel metal bipolar plate. Background technique [0002] Based on the depletion of fossil fuels and increasing concerns about environmental pollution, the demand for new energy is imminent. Among all alternative energy sources, proton exchange membrane fuel cell (PEMFC, its English proton exchange membrane fuel cell) is one of the best choices at present. Compared with other types of fuel cells, PEMFC has the advantages of realizability and long service life. It has the characteristics of low operating temperature (100°C), high energy density, high energy efficiency, fast start-up, no noise and low volatility. , so it is used in various industries, including the automotive industry, stationary power stations, portable equipment and other fields. [0003] The fuel cell stack is the core part of the fuel cell. Its core compone...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the invention of the present invention is to solve the existing metal bipolar plate, which has severe corrosion in the environment of acidity, high temperature and high humidity, reduces the service life of the metal bipolar plate, forms oxides with poor conductivity, and increases the battery capacity at the same time. The problem of internal resistance that reduces the output power of the battery

Images