Proton exchange membrane fuel cell function, proton exchange membrane fuel cell working principle

Proton Exchange Membrane Fuel Cell is a fuel cell that, in principle, is equivalent to the "inverse" device of water electrolysis. The single cell is composed of an anode, a cathode and a proton exchange membrane, the anode is the place where the hydrogen fuel is oxidized, the cathode is the place where the oxidant is reduced, and both poles contain catalysts that accelerate the electrochemical reaction of the electrode, and the proton exchange membrane is used as a medium to transfer H+, and only H+ is allowed to pass through. When working, it is equivalent to a continuous flow of power supply, the anode is the negative pole of the power supply, and the cathode is the positive pole of the power supply.

Proton exchange membrane fuel cells are an efficient, environmentally friendly, and renewable energy technology that works on the basis of electrochemical reactions that produce electricity by reacting hydrogen and oxygen with a proton exchange membrane medium.

Specifically, the proton exchange membrane fuel cell consists of three parts: anode, cathode and proton exchange membrane. The anode usually uses a catalyst such as platinum, and hydrogen is broken down into protons and electrons with the help of the catalyst, in which the proton file quickly passes through the proton exchange membrane, and the electrons flow to the cathode through an external circuit.

At the same time, oxygen reacts with catalysts and electrons from the cathode side and combines with protons to produce water, which is an environmentally friendly reaction product that does not cause any harm to the environment.

It is worth noting that in proton exchange membrane fuel cells, hydrogen can be obtained through various pathways, such as through water splitting, natural gas combustion, etc., so this technology has a wide range of application prospects and will be widely used in the future energy field.

Compared with traditional fossil fuels, proton exchange membrane fuel cells have the advantages of high efficiency, no contamination, and easy control, which can smoothly meet future energy needs.

The working principle of proton exchange membrane fuel cells is as follows:

In principle, it is equivalent to the "inverse" device of water electrolysis. Its single battery is composed of an anode, a cathode and a proton exchange membrane, the anode is the place where the hydrogen fuel is oxidized, the cathode is the place where the oxidant is reduced, and both electrodes contain catalysts that accelerate the electrochemical reaction of the electrode, and the proton exchange membrane is used as the electrolyte. When working, it is equivalent to a continuous flow of power supply, and its anode is the negative pole of the power supply, and the cathode is the positive pole of the power supply.

The basic grinding unit that makes up the proton exchange membrane fuel cell is the monomer fuel cell. Empty nonsense.

The reactions of the two electrodes are as follows:

Anode (Negative): 2H2-4E = 4H+.

Cathode (cathode): O2 + 4E + 4H + = 2H2O.

Note that all electronic e omits the negative superscript. Since the proton exchange membrane can only conduct protons, hydrogen protons can pass directly through the proton exchange membrane to the cathode, while electrons can only reach the cathode through an external circuit.

Introduction to the stack:

A stack is made up of multiple single cells stacked in series. The bipolar plate and the membrane electrode three-in-one assembly (MEA) are alternately superimposed, and the seals are embedded between the monomers, and the front and rear plates are pressed and then fastened and tied with screws to form a proton exchange membrane fuel cell stack.

The stacking should be done in such a way that the main gas channel is aligned so that hydrogen and oxygen can flow smoothly to each cell. When the stack is working, hydrogen and oxygen are introduced from the inlet respectively, distributed to the bipolar plates of each single cell through the main channel of the stack gas, and evenly distributed to the electrodes through the bipolar plate conduction, and the electrochemical reaction is carried out through the electrode support and the catalyst contact.

At the heart of the stack are the MEA components and bipolar plates. MEA is made by placing two carbon fiber paper electrodes sprayed with Nafion™ solution and PT catalyst on both sides of the pretreated proton exchange membrane, so that the catalyst is close to the proton exchange membrane and molded at a certain temperature and pressure. Bipolar plates are commonly made of graphite plate materials, which have the characteristics of high density, high strength, no perforation and air leakage, no deformation under high pressure and strength, excellent electrical conductivity and thermal conductivity of friendly cavity, and good compatibility with electrodes.

Dear, glad to answer for you. Proton exchange membrane fuel cells and hydrogen fuel cells are different concepts, but they are often confused. Proton Exchange Membrane Fuel Cell (PEMFC) is a fuel cell that uses a proton exchange membrane as the electrolyte.

It uses hydrogen and oxygen (or air) as fuel, and undergoes a chemical reaction to produce electricity and water. Dispersed balance proton exchange membrane fuel cells are widely used in automobiles, ships, aerospace and other fields, and are one of the most widely used fuel cell systems in commercial applications. A hydrogen fuel cell (HFC) is a type of battery that uses hydrogen as fuel.

It converts hydrogen and oxygen (or air) into electricity and water through a chemical reaction. Hydrogen fuel cells are mainly used in automobiles, power systems, drones and other fields. Therefore, while both are batteries that use chemical reactions to produce electricity, the difference between proton exchange membrane fuel cells and hydrogen-fueled oak batteries is their electrolyte and fuel.

The electricity generated by proton exchange membrane fuel cells is not easy to store directly, and needs to be converted and stored. Extended information: Proton exchange membrane fuel cell is a new type of fuel cell, which has the advantages of high efficiency, cleanliness and renewable, and is widely used in automobiles, ships, aerospace, home energy and other fields.

In terms of power generation, proton exchange membrane fuel cells have high energy density and stability, which can produce reliable electrical energy output. However, the electricity generated by proton exchange membrane fuel cells is not easy to store directly, and needs to be converted and stored through certain methods. At present, the common power storage methods of proton exchange membrane fuel cells are mainly as follows:

1.The generated electrical energy is exported directly to the grid or load to meet the power demand. 2.

A battery power converter converts direct current into alternating current and stores it in a battery pack. 3.Water electrolysis converts the generated electricity into hydrogen, which is stored in hydrogen storage tanks for subsequent power generation or other uses.

4.The electrochemical energy storage technology is used to convert the generated electric energy into chemical energy and store it in the electrochemical cell. In summary, the amount of electricity generated by proton exchange membrane fuel cells needs to be converted and stored in a certain way to meet the needs of different applications.

It is necessary to select and optimize the surplus according to the actual situation to obtain the best power utilization effect.

Proton exchange membrane fuel cells use (b) as the electrolyte.

a.Ionic membranes.

b.Polymeric membranes

c.Molecule. d.Atom.

Expand your knowledge - polymeric membranes:

Polymeric membrane refers to a film made of polymer materials, which has a variety of properties and is mainly used in membrane separation, water treatment, chemical reaction, medical and health and other fields. Polymeric membranes are generally divided into two categories: organic membranes and inorganic membranes, and the widely studied organic membranes include polyamide membranes (such as reverse osmosis membranes, ultrafiltration membranes), polyether ester membranes, polysulfone membranes, etc.

Inorganic membranes mainly include ceramic films, glass films, etc. The polymeric membrane has excellent physical and chemical properties, smooth surface and uniform pore size, which can efficiently separate and purify solutions, and has become one of the indispensable and important materials in the modern industrial preparation process.

Polymeric membranes have different applications in different fields. In the field of water treatment, reverse osmosis membrane is a common polymeric membrane, which can efficiently remove ions, microorganisms, organic matter and other impurities in water, and is widely used in seawater desalination, drinking water purification, industrial wastewater treatment, etc.

In the field of medical and health care, polymeric membranes can be used for the preparation of artificial blood vessels, artificial hearts and artificial organs, and can also be used for medical dressings, surgical dressings, etc. In the food industry, ultrafiltration membrane is a commonly used polymeric membrane, which can be used for the concentration of yogurt and fruit juice, whey, protein separation, etc.

In the field of electronics, polymeric films can be used as an important part of electronic devices such as battery separators, capacitors, and flexible displays. It can be seen that polymeric membranes play an important role in modern technology and production, and with the development of science and technology and the continuous expansion of application fields, its market prospects are broad.

Polymeric membranes also have a wide range of applications in the energy sector. For example, polymeric membranes in polymer electrolyte membrane fuel cells can act as electrolytes to convert hydrogen and oxygen into electricity, and are efficient, clean, and renewable. In addition, polymeric membranes can also be used in energy devices such as solar panels and lithium-ion batteries.

In the field of environmental protection, polymeric membranes can be used as air pollutant traps, landfill leachate treatment, wastewater reuse, etc. In short, polymeric membranes play an important role in modern society, and have a positive impact on improving living standards, protecting the environment, and promoting economic development.