MEA Encyclopedia? MEA components?

A membrane electrode is an electrode equipped with a combination of membranes in its structure.

The membrane electrode is a hydrogen fuel cell.

The core component is the foundation of fuel cell power, and its cost accounts for 70% of the fuel cell stack and 35% of the fuel cell power system. The sub-anam MEA participates in the National 863 Program.

Fuel Cell Emergency Standby Power Pilot Scale Manufacturing and Operation", which was successfully passed by the Ministry of Science and Technology of the People's Republic of China in 2016.

Acceptance, Fujian Yanan membrane electrode has the following important characteristics:

1.High power density: up to achievable;

2.Low platinum usage: pt cm2 platinum usage;

3.Low humidity operation;

The proton exchange membrane is sandwiched between two electrodes, with a catalyst embedded between them. The electrodes are insulated relative to the proton exchange membrane. These two electrodes are divided into an anode and a cathode.

This proton exchange membrane is a proton permeable membrane, which is insulating. Protons are transported from the anode to the cathode through this insulating film, and electrons are transported from the conductive path to the cathode. DuPont, Dow and E-tek, for example, are producing PEMS for proton exchange membranes.

DuPont's PEM trade name"nafion" 。The Nafion™ proton exchange membranes used by the company are Nafion 112, 115, 117, 105.

The electrodes are hot-pressed on the PEM. Commonly used electrode materials, including carbon fiber, Toray carbon fiber paper. The carbon fiber produced by E-tek is called ELAT, which can maximize the transport of gas to PEM, and the water is separated from the embedded catalyst, which can be used as an electrode.

Platinum is one of the most commonly used catalysts, but other platinum group metals are also commonly used. Ruthenium and platinum are often used together, and if CO is used as a product of an electrochemical reaction, it can destroy the proton exchange membrane and affect the efficiency of the fuel cell. Due to the high cost of rare earth metals, research is currently underway to develop low-cost catalyst materials.

It is precisely because of these high cost factors that it has become an obstacle to the promotion of fuel cells.

The membrane electrode is the core component of hydrogen fuel cell and the foundation of fuel cell power, accounting for 70% of the fuel cell stack and 35% of the fuel cell power system. Yanan membrane electrode participated in the research and development of the national 863 program "manufacturing and operation of fuel cell emergency backup power pilot scale" project, which successfully passed the acceptance of the Ministry of Science and Technology in 2016

1.High power density: the highest power density can be reached;

2.Low platinum usage: pt cm2 platinum usage;

3.Low humidity operation: can operate at 30% relative humidity;

4.Stability and durability: the membrane electrode has been tested for 2000 hours on a 30kw stack;

5.The encapsulation is firmly bonded and has excellent water heat resistance: advanced heat-resistant adhesive is used.

6. The membrane frame and water-resistant hot adhesive can run for 2000 hours without degumming and deformation.

The membrane electrode (MEA) is the place where the electrochemical reaction of the proton exchange membrane fuel cell occurs, and it is the medium that transports electrons and protons, providing a channel for the entry and exit of reaction gases, tail gases and liquid water, and the membrane electrode is the heart of the proton exchange membrane fuel cell.

The membrane electrode is usually composed of 5 parts, namely the proton exchange membrane in the middle, the anodic catalytic layer and the cathode catalytic layer on both sides, and the outermost anode gas diffusion layer and the cathode gas diffusion layer. In 2016, Yanan MEA R&D Center has established a high-level MEA research and development and testing platform, with a full set of related special equipment such as ultrasonic spraying machine, hot press machine, pressure testing machine, single electric pool test bench, high-power stack and engine system dual-purpose test bench, large-scale hydrogen production machine, etc., and Yanan itself also has a laser cutting machine.

Wait for wisdom which Wang book can CNC general equipment.

The membrane electrode is the place where the chemical reaction of the proton exchange membrane fuel cell takes place, and it is the medium that transports electrons and protons, and provides a channel for the inflow and exit of the reaction gas body, tail gas and liquid water.

The membrane electrode (sub-nan) has the following important characteristics:

1.High power density: up to achievable;

2.Low platinum usage: platinum use focal intensity is pt cm2;

3.Low humidity operation;

4.The encapsulation is firm, water and heat resistant;

5.Stable cryptostone bridge is good.

The membrane electrode is the core key component of the hydrogen fuel cell, and it is the foundation of the wax mold battery power, and its cost accounts for 70% of the fuel cell stack and 35% of the fuel cell power system. Yanan membrane electrode participated in the research and development of the national 863 program "manufacturing and operation of fuel cell emergency backup power pilot scale" project, which successfully passed the acceptance of the Ministry of Science and Technology in 2016

1.High power density: the highest round of brightness can be reached;

2.Low platinum usage: pt cm2 platinum usage;

3.Low humidity operation;

The core component of PEMFC is the membrane electrode (MEA), which is generally composed of three parts: proton exchange membrane, catalytic layer and diffusion layer, the so-called "three-in-one structure". The performance of PEMFC is determined by MEA, which is determined by the performance of MEA, the proton exchange membrane performance, the structure of the diffusion layer, the material and performance of the catalytic layer, and the preparation process of MEA itself.

A membrane electrode is a component with a three-in-one structure, which consists of a diffusion layer, a catalytic layer, and a proton exchange membrane. The diffusion layer provides a mass transfer channel for the reactive gases and also acts as a current collector, usually using graphitized carbon paper or carbon cloth.

The general preparation process of MEA is as follows: a certain amount of solvent and binder (such as PTFE) F[ination solution is added to the PT C catalyst, and the electrocatalyst slurry is prepared by ultrasonic mixing, and the catalyst is uniformly coated on the carbon paper by spraying or calendering technology to make a porous electrode. The electrode is then immersed in a proton exchange resin solution for a few moments, dried by vacuum, and then hot-pressed into the electrolyte under certain conditions.

Middle. 2.Add a certain amount of distilled water.

and isopropyl alcohol, in an ultrasonic cleaner, ultrasonic oscillation for a certain time.

3.After that, a certain amount of 5% mass concentration is added dropwise.

For the nafion™ solution, continue sonication for a certain amount of time.

4.The ultrasonic suspension is placed in an oven and dried at a certain temperature for a certain period of time until the suspension is paste-like.

5.The paste is evenly coated on the surface of the carbon paper, and then a certain amount of Nafion™ solution is applied to the surface of the coated catalyst and placed in an oven to dry for 30min.

6.Two sheets of carbon paper coated with catalyst and proton exchange film are placed in a hot press mold and hot pressed under a certain temperature and pressure.

7.The molded membrane electrode is placed in a humid environment for later use.

A membrane electrode is an electrode equipped with a combination of membranes in its structure.

The membrane electrode is the core component of hydrogen fuel cell and the foundation of fuel cell power, accounting for 70% of the fuel cell stack and 35% of the fuel cell power system. Yanan membrane electrode participated in the research and development of the national 863 program "manufacturing and operation of fuel cell emergency backup power pilot scale" project, which successfully passed the acceptance of the Ministry of Science and Technology in 2016

1.High power density: up to achievable;

2.Low platinum usage: pt cm2 platinum usage;

3.Low humidity operation;

The membrane electrode has high proton conductivity, can well isolate hydrogen and oxygen to prevent mutual channeling, and has good chemical and thermal stability and hydrolysis resistance.

Membrane electrode assembly (MEA), also known as membrane electrode, is the key core component of fuel cell power generation, and the membrane electrode and the bipolar plates on both sides form the basic unit of the fuel cell - the fuel cell single cell, which is composed of plates, gas diffusion layer, catalytic layer, and proton exchange membrane.

In 2012, with the Yanan membrane electrode as the core, it participated in the research and development of the National 863 Program "Fuel Cell Emergency Backup Power Pilot Scale Manufacturing and Operation" project, which successfully passed the acceptance of the Ministry of Science and Technology in 2016.

The Yanan MEA R&D Center cooperates with South China University of Technology, Shanghai Jiao Tong University, Xiamen University, Fuzhou University and other scientific research institutions. The long-life MEA developed by the company has been continuously optimized and designed to support the MEA for fuel cell power.

The semi-permeable membrane used in electrodialysis is actually an ion exchange membrane. According to the charge properties of ions, this kind of exchange membrane can be divided into two types: cation exchange membrane (positive film) and anion exchange membrane (negative film). In the electrolyte aqueous solution, the positive film allows the cation to permeate and repel the anion, and the anion allows the anion to permeate and repel the cation, which is the selective permeability of the ion exchange membrane.

In the electrodialysis process, the ion exchange membrane does not exchange with a certain ion in the aqueous solution like the ion exchange resin cavity, but only selectively transmits ions with different electrical properties, that is, the ion exchange membrane does not need to be regenerated. The compartment of the electrode and membrane in the electrodialysis process is called the electrode chamber, and the electrochemical reactions that occur in it are the same as those of ordinary electrodes.

MEAs have the following important characteristics:1High power density: up to achievable; 2.Low platinum usage: pt cm2 platinum usage; 3.Low humidity operation;

The membrane electrode (Yanan) is the core component of hydrogen fuel cell and the foundation of fuel cell power, accounting for 70% of the fuel cell stack and 35% of the fuel cell power system.

Features:1High power density: up to achievable;

2.Low platinum usage: pt cm2 platinum usage;

3.Low humidity operation;

4.The package is firm, and the water and heat resistance are excellent;

5.Good stability.