Novel fuel cell based on graphene thermoelectric management layers

Abstract

The invention discloses a novel fuel cell based on graphene thermoelectric management layers. The novel fuel cell comprises a flow field plate, a diffusion layer, an anode catalytic layer, a proton exchange membrane, a cathode catalytic layer, a diffusion layer and a flow field plate, wherein the anode catalytic layer and the cathode catalytic layer both belong to catalytic layers, the novel fuel cell is characterized in that the graphene thermoelectric management layers are arranged between the anode catalytic layer and the diffusion layer and between the cathode catalytic layer and the diffusion layer and are prepared by mixing graphene, an alcohol solvent and a dispersing agent, and micro-sized concave-convex structures are arranged on the front surface and the back surface of the proton exchange membrane. The graphene-based thermoelectric management layers have ultrahigh electron conduction rate and ultrahigh thermal conduction rate, electrons generated during the electrochemical reaction process of the catalytic layers of the fuel cell and required electrons can be rapidly exported and imported, electrochemical polarization and ohmic polarization are reduced, and output performance is improved; moreover, a large amount of waste heat generated by a catalyst can be rapidly discharged, and stable electrochemical reaction is maintained; and meanwhile, temperature and electric field in the catalytic layers also can be balanced, and the service life of the fuel cell is prolonged.

Description

technical field [0001] The invention belongs to the technical field of energy conversion and energy storage, in particular to the field of fuel cell new energy power generation, and in particular to a novel fuel cell based on a graphene thermoelectric management layer. Background technique [0002] Proton Exchange Membrane Fuel Cell (Proton Exchange Membrane Fuel Cell, hereinafter referred to as fuel cell) is a zero-emission, high-efficiency and high-power-density power generation device, especially in the application of new energy transportation power, which has an extremely attractive prospect. After years of continuous research and development worldwide, fuel cells have made breakthroughs in performance indicators such as energy efficiency, power density, specific power, and low-temperature start-up, such as: 1) The fuel cell engine developed by Hyundai-Kia has an energy efficiency of 25%. The rated power (the ratio of DC output electric energy to the input hydrogen fuel ...

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Problems solved by technology

In short, the above-mentioned patents all focus on the unilateral innovation of fuel cell cost or durability, but cannot take into account the comprehensive improvement of fuel cell cost and durability, and lack core technologies based on high performance, low cost, and long life. An important reason why the durability and cost of the current fuel cell system have not reached the commercialization target

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