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Composite materials with combined electronic and ionic properties

DOI: 10.1016/j.matt.2019.04.007 DOI Help

Authors: Noam Ralbag (The Hebrew University of Jerusalem) , Meirav Mann-lahav (Technion—Israel Institute of Technology) , Elena S. Davydova (Technion—Israel Institute of Technology) , Uri Ash (Technion—Israel Institute of Technology) , Reuven Galed (Technion—Israel Institute of Technology) , Michael Handl (Hochschule Esslingen University of Applied Sciences) , Renate Hiesgen (Hochschule Esslingen University of Applied Sciences) , Emanuele Magliocca (University of South Carolina) , William Mustain (University of South Carolina) , Jin He (The Hebrew University of Jerusalem) , Peixi Cong (University College London; Research Complex at Harwell) , Andrew Beale (University College London; Research Complex at Harwell) , Gideon S. Grader (Technion—Israel Institute of Technology) , David Avnir (The Hebrew University of Jerusalem) , Dario R. Dekel (Technion—Israel Institute of Technology)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Matter

State: Published (Approved)
Published: August 2019
Diamond Proposal Number(s): 18835

Abstract: In this work, we develop a new type of composite material that combines both electrocatalytic and ionic properties, by doping a silver metal catalyst with an anion-conducting ionomer at the molecular level. We show that ionomer entrapment into the silver metallic structure is possible, imparting unique properties to the catalytic character of the metallic silver. The novel composite material is tested as the cathode electrode of fuel cells, showing significant improvement in cell performance as compared with the undoped counterpart. This new type of material may then replace the current design of electrodes in advanced fuel cells or other electrochemical devices. The possibility to merge different properties into one composite material by molecular entrapment in metals can open the way to new materials, leading to unexplored fields and applications.

Journal Keywords: entrapment; metals; ionomers; electrocatalysts; ionic conductivity; electronic conductivity; composites; electrodes; fuel cells; anion-exchange membrane; fuel cells

Subject Areas: Materials, Chemistry, Energy

Instruments: B18-Core EXAFS