A vein bionic piezo-osmotic three-in-one bipolar plate and its working method

Abstract

The invention discloses a three-in-one bipolar plate of leaf vein bionic piezoosmotic type and its working method. The main area of ​​the plate is divided into electrochemical catalytic reaction areas with uniform size and shape, which reduces the flow of reactants and makes the concentration distribution on the bipolar plate more uniform, which solves the problem of uneven temperature distribution on the bipolar plate caused by uneven concentration of reactants And the positive feedback mechanism that causes the output performance to deteriorate; the new "three-in-one" structure that combines the functions of the flow field, the diffusion layer, and the catalytic layer in the present invention provides a compact and efficient electrode structure; the metal foam filling phase The composite structure of the change material absorbs the exothermic heat of the electrochemical reaction. The invention can effectively improve the energy utilization efficiency of the reactants, not only output electric energy to the outside, but also store the waste heat in the phase change material as the heat preservation heat source during the standby process of the stack, which saves energy and improves the energy efficiency at the same time. Fast response characteristics of stack restart.

Description

technical field [0001] The invention relates to the field of electrochemical reaction devices, in particular to a leaf vein bionic piezo-osmotic three-in-one bipolar plate and a working method thereof. Background technique [0002] The clean and efficient use of energy is a necessary measure to deal with environmental problems such as smog and pollution caused by the traditional extensive use of fossil energy. Electrochemical energy supply and electrochemical energy storage devices, as a device that directly converts chemical energy into electrical energy, have received extensive research and attention. Fuel cells are typical representatives of electrochemical energy supply devices, and flow batteries are typical representatives of electrochemical energy storage devices. The theoretical energy conversion efficiency of the fuel cell is as high as 100%, and it is not limited by the Carnot cycle, and directly converts the chemical energy of the fuel into electrical energy. Be...

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Problems solved by technology

[0006] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a leaf vein bionic piezo-osmotic three-in-one bipolar plate and its working method to solve the problem of local overheating of the electrochemical reaction device

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