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The Nile on eBay Hydrocarbon Polymer Electrolytes for Fuel Cell Applications by Tatsuhiro Okada, Jinli Qiao Direct methanol fuel cells(DMFCs), employing liquid methanol as a fuel, offer attractive option in portable devices due to their simplicity in the system structure(easy storage and supply), and no need for fuel reforming. For obtaining higher power density, the membranes that show high proton conductivity and low methanol permeability are desired. FORMAT Paperback LANGUAGE English CONDITION Brand New Publisher Description Direct methanol fuel cells (DMFCs), employing liquid methanol as a fuel, offer an attractive option in portable devices due to their simplicity in the system structure (easy storage and supply), no need for fuel reforming or humidification. For obtaining a higher power density, the membranes that show high proton conductivity, and at the same time, low methanol permeability are strongly desired. However, there is achieved only a little progress because of trade-off relations between these parameters. Also the membrane stability, particular to hydrolytic and chemical stability is recognised as a key factor that affects fuel cell performances. In the authors' recent work, they have been working on the design and the development of new families of cost-effective, readily prepared proton-conducting membranes based on chemically cross-linked PVA-PAMPS [poly(vinyl alcohol) and poly(2-acrylamido-2-methyl-1-propanesulfonic acid)] composites. The authors have first introduced new concepts of secondary polymer chains such as "binary chemical cross-linking" or "hydrophobiciser" and the "stabiliser"effect.Also, the authors have established a new concept of PVA-PAMPS based semi-interpenetrating polymer networks (semi-IPNs) by incorporating plasticizer variants R (R = poly(ethylene glycol)(PEG), poly(ethylene glycol) methyl ether (PEGME), poly(ethylene glycol) dimethyl ether (PEGDE), poly(ethylene glycol) diglycidyl ether (PEGDCE)) and poly(ethylene glycol)bis(carboxymethyl)ether (PEGBCME) as the third components. Incorporation of the above concepts promoted not only the high proton conductivity , flexibility with low methanol permeability (1/3 - 1/2 of Nafion 117 membrane), but also the excellent hydrolytic and the oxidative stability of PVA-PAMPS composites. The membrane electrode assembly (MEA) fabricated with PVA-PAMPS composites has been successfully established, which showed the similar open circuit voltage (OCV) to that of Nafion 115, and a power density 52 mW cm-2 at 80oC. A striking feature of the long-term test was that no appreciable decay of the current density was observed during the whole operation time longer than 130 hours at 50oC, and so was the power density.This book is the first time that such long-term operation of DMFC was reported since PVA-PAMPS composite are all hydrocarbon membranes made simply of aliphatic skeletons. They are very different from the perfluorosulfonic membranes such as Nafion, or other reported membranes with aromatic skeletons. Therefore this affords the PVA-PAMPS composites unique structure compared to most of the proposed membranes, which suggests the good candidacy of PVA-PAMPS composites when they are intended for use in low temperature DMFCs. Table of Contents Preface; Introduction; PVA-PAMPS as Novel Hydrocarbon Proton-Conducting Electrolyte Membranes; Plasticizer Incorporated PVA-PAMPS Semi-Interpenetrating Polymer Networks; PVA-PAMPS Composites on the Basis of Binary Chemical Cross-Linking/or Side Chains; Cell Performances of PVA-PAMPS Hydrocarbon Proton-Conducting Electrolyte Membranes in a Real DMFC; PVA-Based other Polymer Membranes and Its Application for PEFC and AFC; Index. Details ISBN 1604568461 Short Title HYDROCARBON POLYMER ELECTROLYT Language English ISBN-10 1604568461 ISBN-13 9781604568462 Media Book Author Jinli Qiao Imprint Nova Science Publishers Inc Place of Publication New York Country of Publication United States Format Paperback Pages 73 Year 2008 Publication Date 2008-11-01 DOI 10.1604/9781604568462 UK Release Date 2008-11-01 AU Release Date 2008-11-01 NZ Release Date 2008-11-01 US Release Date 2008-11-01 Publisher Nova Science Publishers Inc DEWEY 621.312429 Audience Professional & Vocational Illustrations Illustrations We've got this At The Nile, if you're looking for it, we've got it. With fast shipping, low prices, friendly service and well over a million items - you're bound to find what you want, at a price you'll love! TheNile_Item_ID:14091681;