About AEM Electrolysis
Enapter’s core technology is the patented Anion Exchange Membrane (AEM) Electrolyser.
We are the pioneers and market leader of commercialised AEM Electrolysers and at the forefront of R&D for AEM Electrolysis.
What is AEM Electrolysis?
AEM (Anion Exchange Membrane) electrolysis is a type of water electrolysis technology used to produce hydrogen. Unlike proton exchange membrane (PEM) electrolysis, AEM electrolysis employs a semipermeable anion exchange membrane that conducts negatively-charged ions (anions) to split water molecules into hydrogen and oxygen.
One of the main advantages of AEM electrolysis: It does not require high-cost noble metal catalysts. Instead, it can utilise low-cost transition metal catalysts. Similar to alkaline water electrolysis, the electrodes in AEM electrolysis operate in an alkaline environment. However, compared to PEM, the water requirements for AEM electrolysis are less strict and a slightly alkaline solution can be used, reducing the risk of leakage and handling issues associated with highly alkaline solutions.
Using this process, Enapter’s AEM electrolysers produce green hydrogen at a purity of 99.9% (up to 99.999% with a dryer) at a pressure of 35 bar, using only water and renewable electricity.
What are the benefits of AEM Electrolysis?
Unlike PEM electrolysers, AEM electrolysers need no titanium corrosion protection, nor costly iridium. Our standardised production also leverages significant cost advantages. They likewise avoid the downsides of alkaline technology: most importantly, that it is less able to cope with the load changes and dynamics of intermittent renewable energy.
Our AEM technology combines the best of PEM and alkaline electrolysers.
High operational flexibility
Its hydrogen output range matches energy fluctuations of renewable electricity sources.
Fast response time
Quick ramp-up/ramp-down in response to these changes in energy load from intermittent renewables
Small footprint
Compact and cleverly-designed modular systems enable H2 production at exactly the scale you need.
Price stability
AEM Technology avoids the use of expensive raw materials like iridium, promoting price and supply chain stability.
Future-proofed
AEM membranes and ionomers/binders do not require the use of non-degradeable PFAS materials, enabling AEM to comply with upcoming PFAS restrictions
Pioneering AEM Electrolysis
AEM Electrolyser technology first came to life through the Italian R&D firm ACTA S.p.A in 2009, before Enapter took over the core tech, patents and electrochemistry team in 2017.
As the world’s leading developer and manufacturer of AEM electrolysers, Enapter builds on more than 20 years of AEM experience with a strong R&D team advancing AEM technology.
Explore Enapter’s AEM Expertise
Enapter’s AEM Electrolysers
Enapter’s AEM technology can meet green hydrogen production needs from 2.4 kW up to multi-MW, thanks to our range of standardised, modular electrolyser systems.
AEM Electrolyser EL 4
Our modular product – start small with one AEM electrolyser and stack more modules to scale hydrogen production.
AEM Electrolyser EL 4
AEM Flex 120
Flexible in configuration and in operation, unlocking a wide range of green hydrogen applications up to 350 kW.
AEM Flex 120
AEM Nexus 1000
Meet the AEM Nexus: Our ready-made megawatt-scale electrolyser system with 420 AEM cores.
AEM Nexus