Membrane electrode (MEA), also known as "three in one" or "five in one" module, is the core component of proton exchange membrane fuel cell (PEMFC) and the place of energy conversion in fuel cell. Membrane electrode is responsible for the transport of multiphase materials (including liquid water, hydrogen, oxygen, protons and electrons) in the fuel cell, and converts the chemical energy of fuel hydrogen into electrical energy through electrochemical reaction. The performance and cost of membrane electrode affect and even determine the performance, life and cost of PEMFC. The membrane electrode with high efficiency multiphase transmission capability can greatly improve the performance of PEMFC, reduce the auxiliary equipment consumption of stack system, thus reducing the stack cost and improving the reliability of stack system.
CCM core process and mea "5 in one" continuous roll to roll production is adopted.
Process Description: the anode and cathode catalyst coatings are uniformly sprayed on the release film by ultrasonic spraying technology. After drying and curing, the catalyst layer is symmetrically and thermally compounded onto the proton exchange membrane by the continuous production line of roll to roll five in one, and then the release membrane of catalyst carrier is peeled off and rolled up online, and then the CCM and coated carbon cloth are symmetrically hot pressed and rewound. Finally, it is cut into specified specifications for single battery packaging. The membrane electrode produced by this process can avoid swelling phenomenon, and the amount of catalyst layer is small, ultra-thin and uniform, and the catalytic efficiency of catalyst is high, which can be reduced to 0.4 ~ 0.6 mg/cm2 at the lowest level. The activation time of the battery is short and the electrochemical response is fast. Due to the continuous production, it has high automation, high production efficiency, low manufacturing cost, stable product performance and high durability.
|Model||Application||Operating conditions||Material system||Performance|
|Active area||Durability/hr||Open circuit voltage/V||Power density/W/cm2|
|LGFC-301||Commercial vehicle||Hydrogen pressure：40~200kPa|
Working temperature：ambient temperature~90℃
Low temperature startup capability：-35℃
Thickness of proton exchange membrane：10~20µm
Thickness of diffusion layer：150~230µm
|LGFC-400||Communication base station|
|Index||Unit||Legion's MEA||U.S. Department of energy 2020 goals|
|Rated output power||Output email@example.com||W||0.85||1|
|Catalyst durability cycle test||Output loss@1A/cm2|
|Electrochemical specific surface area loss||%||25||<40|
|Cycle test of catalyst support durability||Output loss@1A/cm2|
|Electrochemical specific surface area loss||%||15||<40|
|Anti polarity performance||Reverse pole tolerance time||Min||80||-|
|Test conditions||1. Single cell test conditions: hydrogen / air, relative humidity 0 / 50%, inlet pressure 80 / 70kpa, metering ratio 1.5 / 2.0 |
2. Hydrogen / oxygen 500 / 500ml / min, 80 ℃, humidity 100% RH, 50kPa, 0.6V 3S, 0.953s square wave cycle, a total of 10000 cycles
3. Hydrogen / oxygen 500 / 500ml / min, 80 ℃, humidity 100% RH, 50kPa, 1-1.5v CV, scanning speed 0.5v/s, a total of 1000 cycles
The production technology is advanced and can be produced in batch. Mea adopts the continuous production technology of roll to roll;
Low catalyst dosage, uniform coating, uniform performance and stable quality;
High power density;
High durability and good dimensional stability;
Environmental adaptability is strong;
Can provide mea customized solutions for customers.