Membrane Electrode Assembly Coating

Membrane Electrode Assembly Coating – Ultrasonic Atomizing Coating – Cheersonic

Membrane Electrode Assembly (MEA) is the core component of a proton exchange membrane fuel cell (PEMFC). It is a multiphase material transfer and electrochemical reaction site for energy conversion, involving three-phase interface reactions and complex mass and heat transfer processes. Directly determine the performance, life and cost of PEMFC. The structure of MEA mainly includes a gas diffusion layer, a catalytic layer, and a proton exchange membrane. The gas diffusion layer usually includes carbon paper/carbon cloth and a microporous layer supported on it. Generally, the MEA composed of the cathode gas diffusion layer, the cathode catalyst layer, the proton exchange membrane, the anode catalyst layer and the anode gas diffusion layer is called “five in one” MEA. One” MEA. As the most core component of fuel cells, MEA is of great significance to improve its performance and life and reduce costs, which can accelerate the large-scale commercialization of PEMFC. Therefore, the development of MEA with simpler preparation process, more stable performance and lower cost is the main research direction.

Membrane Electrode Assembly (MEA) coating is the core manufacturing process for proton‑exchange‑membrane fuel cells, which forms functional catalyst layers directly onto proton exchange membranes or gas diffusion substrates. The coating quality largely governs MEA power density, durability and overall stack performance.

This process deposits catalyst ink consisting of platinum‑group metal catalysts, ionomer binders and solvents to construct the critical three‑phase reaction zone. Well‑controlled coating creates uniform, thin and defect‑free catalyst layers. It maximizes catalyst utilization, reduces noble metal loading, and builds sufficient channels for proton conduction, gas transport and water discharge. Pinholes, uneven thickness or poor adhesion will trigger performance degradation, membrane damage and shortened service life.

There are two mainstream coating routes: catalyst‑coated membrane and catalyst‑coated substrate. For catalyst‑coated membrane, ink is applied directly onto the membrane surface. For catalyst‑coated substrate, coating is finished on gas diffusion layers before hot‑press assembly. Each route has unique advantages in mass production, thickness tolerance and yield control.
Representative production technologies include ultrasonic spray coating, slot‑die coating and screen printing. Ultrasonic spray coating generates gentle atomized droplets, delivering conformal thin films with low internal stress. It adapts well to variable MEA sizes and supports low‑platinum‑loading production.

Key industrial bottlenecks focus on batch‑to‑batch consistency, anti‑crack performance under humidity‑temperature cycling, and cost reduction. Optimized MEA coating technology is essential to scale‑up fuel cell commercialization for vehicles and stationary power supplies.

Cheersonic’s unique ultrasonic spray technology delivers efficient, stable and precision coating, which improves the catalyst utilization and improves the three-dimensionality. Designed for sprayingPEM, GDL, Electrode and electrolyte materials, as well as carbon black ink suspension, PTFE binder, ceramic slurry, platinum, platinum and other expensive metal catalysts. The standing model can meet the needs of R&D.

Video of Ultrasonic Fuel Cell Coating

About Cheersonic

Cheersonic is the leading developer and manufacturer of ultrasonic coating systems for applying precise, thin film coatings to protect, strengthen or smooth surfaces on parts and components for the microelectronics/electronics, alternative energy, medical and industrial markets, including specialized glass applications in construction and automotive.

Our coating solutions are environmentally-friendly, efficient and highly reliable, and enable dramatic reductions in overspray, savings in raw material, water and energy usage and provide improved process repeatability, transfer efficiency, high uniformity and reduced emissions.

Chinese Website: Cheersonic Provides Professional Coating Solutions