个人简介

B.Sc., University of Salford, U.K. Ph.D., Simon Fraser University

研究领域

Polymer Science & Fuel Cells

Fuel Cell Materials and Polymers for Macromolecular Electronics The common theme of this research program is electroactive organic materials and polymer films. The program bridges polymer synthesis, materials science, organic electronics and electrochemistry. Our strategy is to understand how the structure and morphology of polymers and organic materials affects electrical, electrochemical, and optical properties. We use this information to synthesize and study new materials onto which specific properties are conferred. One theme concerns the polymer science and electrochemistry of proton exchange membrane fuel cells. Fuel cells are akin to batteries in which the reagents are continually fed to electrodes. When the fuel and oxidant are hydrogen and oxygen, respectively, the product is water and electricity. The fuel cell generates electricity as long as reagents continue to flow to the electrodes. The program involves aspects of monomer design and polymerization, solution and solid-state characterization of polymers, the study of proton and water mobility, investigations of solid state electrochemistry in polymeric media, the electrochemistry of gas diffusion electrodes, and fuel cell studies. Another theme concerns optical properties of pi -conjugated polymer films . The goal is to understand relationships between structure and function. This is part of our program that contributes to a science: macromolecular electronics - a science that bridges molecular electronics and conventional microelectronics. Areas of specific interest include electroluminescent polymers, organic photovoltaics, and micropatterning of conjugated polymers.

近期论文

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D. Novitski, A. Kosakian, T. Weissbach, M. Secanell, S. Holdcroft, “Electrochemical reduction of dissolved oxygen in alkaline, solid polymer electrolyte films”, J. Am. Chem. Soc., 138 (47) (2016) 15465–15472. T. Weissbach, A. G. Wright, T. J. Peckham, A. Sadeghi Alavijeh, V. Pan, E. Kjeang, S. Holdcroft, “Simultaneous, Synergistic Control of Ion Exchange Capacity and Crosslinking of Sterically-Protected Poly(benzimidazolium)s”, Chem. Mater., 28 (21) (2016) 8060-8070. A. Wright, J. Fan, B. Britton, T. Weissbach, H.-F. Lee, E. Kitching, T. J. Peckham, S. Holdcroft, “Hexamethyl-p-terphenyl poly(benzimidazolium): a universal hydroxide-conducting polymer for energy conversion devices”, Energ. Environ. Sci., 9 (6) (2016) 2130–2142. P. Chowdhury, G. Suppes, P. Fortin, S. Holdcroft, “Aqueous Photoelectrochemical Reduction of Anthraquinone Disulfonate at Organic Polymer Films”, Macromol. Chem. and Phys., 217 (10) (2016) 1119-1127. B. Britton, S. Holdcroft, “The Control and Effect of Pore Size Distribution in AEMFC Catalyst Layers”, J. Electrochem. Soc, 163 (5) (2016) F1-F6. T. Weissbach, T. J. Peckham, S. Holdcroft, “CeO2, ZrO2 and YSZ as Mitigating Additives Against Degradation of Proton Exchange Membranes by Free Radicals”, J. Mem. Sci., 498 (2016) 94–104. S. V. Venkatesan, C. Lim, E. Rogers, S. Holdcroft, E. Kjeang “Evolution of water sorption in catalyst coated membranes subjected to combined chemical and mechanical degradation”, Phys.Chem.Chem.Phys., 17 (2015) 13872-13881. G. Suppes, P. Fortin, S. Holdcroft, “Photoelectrochemical Hydrogen Evolution: Single-Layer, Conjugated Polymer Films Bearing Surface-Deposited Pt Nanoparticles” J. Electrochem. Soc. 162 (2015) H551-H556. J. Luo, L. Ghazemzadeh, S. Holdcroft, “Effect of free radical-induced degradation on water permeation through PFSA ionomer membranes” Int. J. of Hydrogen Energy, 40 (2015) 16714-16723. D. Novitski, S. Holdcroft, “Determination of O2 mass transport at the Pt | PFSA ionomer interface under reduced relative humidity”, ACS App. Mater. Int., 7 (49) (2015) 27314-27323. D. Novitski, Z. Xie, S. Holdcroft, “Time-Dependent Mass Transport for O2 Reduction at the Pt | Perfluorosulfonic Acid Ionomer Interface”, ECS Electrochemistry Letters, 4 (1) (2015) F9-F12. A. Strong, B. Britton, D. Edwards, T. J. Peckham, H.-F. Lee, W. Y. Huang, S. Holdcroft, “Alcohol-Soluble, Sulfonated Poly(arylene ether)s: Investigation of Hydrocarbon Ionomers for Proton Exchange Membrane Fuel Cell Catalyst Layers”, J. Electrochem Soc., 162 (2015) F513-F518. H.-F. Lee, Y. –C. Huang, P. –H. Wang, C. C. Lee, Y. –H. Hung, R. Gopal, S. Holdcroft, W.-Y. Huang, “Synthesis of Highly Sulfonated Polyarylene Ethers Containing Alternating Aromatic Units”, Materials Today Communications, 3 (2015) 114–121. C.C.Yang, R.Narimani, B.J.Frisken, S.Holdcroft, Investigations of crystallinity and chain entanglement on sorption and conductivity of proton exchange membranes, J. Mem. Sci., 469 (2014) 251–261. C. Lim, L. Ghassemzadeh; F. Van Hove, M. Lauritzen, J. Kolodziej; G. Wang, S. Holdcroft; E. Kjeang, “Membrane degradation during combined chemical and mechanical accelerated stress testing of PEM fuel cells,” J.Power Sources, 257 (2014) 102-110. Y. Treekamol, M.Schieda, L. Robitaille, S.M. MacKinnon, A. Mokrini, A. Z.Q.Shi, S. Holdcroft, K. Schulte, S.P Nunes, “Nafion (R)/ODF-silica composite membranes for medium temperature proton exchange membrane fuel cells”, J. Power Sources, 247 (2014) 322. H.–F. Lee, P.-H. Wang, Y.-C. Huang, W.-H. Su, R. Gopal, C.C. Lee, S. Holdcroft, W.-Y. Huang “Synthesis and Proton Conductivity of Sulfonated, Multi-phenylated Poly(arylene ether)”, J. Polymer Sci. Part A-Polymer Chem., 52 (2014) 2579-2587. M. El Hannach, T. Soboleva, K. Malek, A. A. Franco, M. Prat, J. Pauchet, S. Holdcroft, “Characterization of pore network structure in catalyst layers of polymer electrolyte fuel cells”, J. Power Sources, 247(1) (2014) 322-326. S. Holdcroft, “Fuel Cell Catalyst Layers” Chem. Mater. Invited perspective commemorating 25 years of Chemistry of Materials, 26 (1) (2014) 381–39. L. Ghassemzadeh, T. Peckham, T. Weissbach, X. Luo, S. Holdcroft, “Selective Formation of Hydrogen and Hydroxyl Radicals by Electron Beam Irradiation and Their Reactivity with Perfluorosulfonated Acid Ionomer”, J. Am. Chem. Soc., 135 (2013) 15923–15932.