[ manufacturing ] challenge as both high and low surface energies are needed for different steps of the process . when selecting renewable energy materials like Versiv ’ s CL4 and CF205 .
Versiv Composites aims to deliver high-quality solutions for producing catalytic layers for CCMs . Our DF100 5 mil substrate effectively meets both requirements : it has adequate surface energy for initial wettability while allowing for seamless transfer .
Environmental benefits of decal transfer technology
From an environmental perspective , decal transfer technology presents advantages over traditional spray coating methods . Spray coating can sometimes result in uneven catalyst application across the MEA , leading to performance inconsistencies . Additionally , it can potentially contribute to air pollution due to solvent use and restrict human activity in proximity during application .
In contrast , decal transfer allows for precise application of thinner catalyst layers compared to conventional methods . This not only conserves precious metals and reduces costs but also minimises resource usage – enhancing sustainability . The repeatability of the decal transfer process ensures uniformity across layers , resulting in consistent performance in fuel cells and electrolysers .
Moreover , high-quality substrates enable thinner catalyst layers without compromising performance . Inadequate adhesion from directly coated layers can lead to delamination or operational failures , jeopardising system integrity .
Cost efficiency and mould release
During cell stacking , components must easily release from moulds without leaving residual materials behind . This ease of release minimises downtime during MEA pressing , contributing to cost savings – a crucial factor
Future potential of decal substrates and catalyst inks
Despite its existing advantages , there is still room for improvement within decal transfer technology . Future advancements may focus on developing substrates with optimised surface properties that enhance both wettability and transfer efficiency . Innovations in catalyst formulations could yield inks with better adhesion , conductivity , and durability – further reinforcing the benefits of this method .
Direct coating method ( DCM )
In addition to decal transfer technology , direct coating methods ( DCM ) should be considered . DCM includes two main forms : 1 . Directly coating the membrane ( spray ) 2 . Decal transfer with liquid membrane instead of membrane foil : This method involves using a substrate ( e . g ., DF100 material ), followed by electrode application ( anode or cathode ), liquid membrane casting , and subsequent electrode application before peeling off the substrate .
Given this context , decal transfer technology offers notable advantages over direct coating methods regarding precision , material efficiency , environmental impact , adhesion strength , and scalability . Thinner membranes enhance fuel cell efficiency while reducing costs associated with precious metals and minimising resource consumption – contributing to sustainability in clean technology development .
In summary , decal transfer technology stands out as a preferred choice for producing highperformance CCMs in fuel cell and electrolyser applications , ultimately fostering improved sustainability within clean technology initiatives .
Hydrogen Tech World | Issue 18 | October 2024 33