Deposition of polymer coating on metallic powder through ball milling: Application to hydrogen storage intermetallics

Ball milling technique was used for deposition of the polytetrafluoroethylene (PTFE) coating on the powder of TiFe intermetallic compound. Measurement of pressure–composition hydrogen absorption isotherms revealed that the polymer-coated TiFe intermetallic compound kept its hydrogen storage ability. The TiFe/PTFE material demonstrated resistance to surface poisoning even after a prolonged exposure to air and was not subjected to pulverization during multiple hydrogenation–dehydrogenation cycles. Copyright © 2015 John Wiley & Sons, Ltd.