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Preparation and characterisation of novel composites based on a radiation grafted membrane for fuel cells

Çilingir Doğan, Halime Didem and Alkan Gürsel, Selmiye (2011) Preparation and characterisation of novel composites based on a radiation grafted membrane for fuel cells. Fuel Cells, 11 (3). pp. 361-371. ISSN 1615-6846

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Official URL: http://dx.doi.org/10.1002/fuce.201000153

Abstract

Novel composites for fuel cells were prepared via two different methods using a radiation grafted membrane, prepared from poly(ethylene-alt-tetrafluoroethylene) (ETFE) and styrene, and commercial Nafion (R) 112 as the substrates. The first method was based on chemical polymerisation of pyrrole (Py) on the membrane followed by platinum (Pt) deposition by chemical reduction. The second method was based on direct deposition of Pt on the membrane by several steps of initial composite formation and surface electrodeposition. Polypyrrole (PPy) was coated as a layer only on the surface of the membrane. The thickness of PPy layer, proton conductivity of the composites and Pt loading could be controlled with Py polymerisation time. Moreover, the deposition of Pt on the surface as the granular particles was achieved by the first method while Pt deposition occurred as the aggregates of particles on the surface of the membrane by the second method which yielded wavy and rough surfaces. The first method offered a simple, quick, reproducible and effective procedure, yet some of the Pt particles peeled off from the surface of the composites. The second method required complex, multistep and tedious procedure with a high amount of Pt precursor, while Pt particles were more stable in this case.

Item Type:Article
Uncontrolled Keywords:Composite; Conducting Polymer; Fuel Cell; Polymer Electrolyte Membrane; Pt Deposition; Radiation Grafting
Subjects:T Technology > TP Chemical technology > TP0315-360 Fuel
ID Code:16577
Deposited By:Selmiye Alkan Gürsel
Deposited On:27 Jun 2011 16:18
Last Modified:27 Jun 2011 16:18

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