New Interface for PEMWE Electrolysis by Thermally Sprayed BPP-PTL-Compound

Titel: New Interface for PEMWE Electrolysis by Thermally Sprayed BPP-PTL-Compound Autors: K. Bobzin, H. Heinemann, M. Erck, K. Radermacher Affiliates: Surface Engineering Institute In order to take climate action for carbon neutrality, green hydrogen should be implemented to all industrial sectors. The proton exchange membrane water electrolyzer (PEMWE) allows sustainable hydrogen production if electrolyzer lifetime can be balanced with the production costs. In terms of electrolyzer effectivity, interface modification is an important mean regardless if it involves the BPPPTLinterface or the PTL-catalyst interface. In this study, a new two-step approach in interface modification is discussed. Firstly, a steel-based bipolar plate (BPP) is coated by thermal spraying. Secondly, a thermally sprayed porous transport layer (PTL) is directly applied onto the coating reducing construction gaps in the cell design. The interface modification is evaluated by measuring the interfacial contact resistance (ICR). Accordingly, the ICR is successfully reduced by this approach. The reason for this observation is that BPP and PTL are joined in a new way, namely mechanical interlocking by thermal spraying. The newly developed BPP-PTL-compound is a promising approach for interface modification in the context of PEMWE. Keywords: PEMWE, Hydrogen, CGS, HVOF Seite 2 von 2 Seite 1 von 2