Membrane Electrode Assemblies (MEAs)
The integrated membrane, catalyst layers and gas-diffusion components at the heart of PEM fuel cells.
What this topic covers
The integrated membrane, catalyst layers and gas-diffusion components at the heart of PEM fuel cells.
Core energy-system ideas
The MEA brings together catalytic sites, proton conduction, electronic conduction and gas transport.
Catalyst loading is only one part of MEA performance.
Manufacturing consistency and layer durability strongly influence stack performance.
Important tradeoffs
Catalyst loading should be evaluated together with mass activity, transport, manufacturing and durability.
Material and performance evidence
Water, heat, gas purity and transient operation can change how effectively platinum catalyst layers perform.
Lifecycle perspective
The stack contains much more than platinum, so catalyst improvement does not eliminate balance-of-plant constraints.