Fuel cascade utilizing material separation transfer fuel cell and working method thereof

Abstract

The invention discloses a fuel cascading utilization and raw material and product separation conveying fuel battery and an operating method thereof. The fuel battery comprises an anode flow field plate and a cathode flow field plate which are arranged on a fuel battery body, wherein raw material supply pipelines and branches, product discharge pipelines and branches, hydrogen product discharge pipelines for secondary product recovery, hydrogen supply pipelines and branches, oxygen product discharge pipelines and oxygen supply branches are independently arranged in the anode flow field plate and the cathode flow field plate. According to the fuel battery, raw materials and products are separately conveyed, and the products oxygen and hydrogen are led into a fuel recovery flow field corresponding to a fuel conveying flow field for secondary utilization in an electrode, so that forward flow conveying of fuel and the products is ensured; mixing of the fuel and the products is avoided; thefuel and an oxidant can efficiently convert chemical energy into electric energy; high-efficiency utilization of the fuel and the oxidant is improved; and the discharging efficiency of the battery isexerted to the greatest extent.

Description

technical field [0001] The invention relates to the technical field of fuel cells, in particular to a fuel cascade utilization material separation transport fuel cell and a working method thereof. Background technique [0002] Fuel cell technology is a new type of power generation technology, which can directly convert the chemical energy existing in fuel and oxidant into electrical energy, with high efficiency, no pollution, no noise, high reliability, modularization, and quick response to load changes And other significant advantages, it is considered to be the ultimate solution to the energy crisis. Fuel cells are mainly composed of ion exchange membranes, cathode and anode electrodes and bipolar plates. Wherein the membrane electrode (membrane electrode assembly, MEA) composed of the cathode electrode, the ion exchange membrane and the anode electrode is the place where the electrochemical reaction of the fuel cell occurs. Fuel and oxidant are passed to the anode and c...

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Problems solved by technology

In this process, with the flow of fuel in the flow channel and the diffusion reaction in the electrode, the fuel consumption product continues to enter the flow channel, and the concentration of the fuel gradually decreases, which leads to the uneven distribution of the fuel concentration in the electrode, and the decline Electrode reaction efficiency, further reducing the operating efficiency of direct liquid fuel cells

[0005] At the same time, borohydride solutions are prone to hydrolysis to generate hydrogen under natural conditions, and hydrogen peroxide is prone to generate oxygen under natural conditions. This problem reduces the conversion rate of fuel and oxidant chemical energy to electrical energy to a certain extent; During the road, the generated gas and fuel are easily mixed, difficult to discharge, and easy to stay inside the battery, affecting the efficient operation of the battery

[0006] Therefore, in order to solve the problems of fuel product mixing, uneven fuel concentration distribution, and low cell reaction efficiency during the flow reaction process of fuel cell fuel, a fuel product phase separation transfers downstream, the fuel concentration is uniformly distributed, and the fuel oxidant is efficiently utilized. High-efficiency fuel cells are urgently needed

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