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Hydrocarbon Polymer Electrolytes for Fuel Cell Applications by Tatsuhiro Okada, Jinli Qiao Estimated delivery 3-12 business days Format Paperback Condition Brand New Description 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. 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. Details ISBN 1604568461 ISBN-13 9781604568462 Title Hydrocarbon Polymer Electrolytes for Fuel Cell Applications Author Tatsuhiro Okada, Jinli Qiao Format Paperback Year 2008 Pages 73 Publisher Nova Science Publishers Inc GE_Item_ID:14091681; About Us Grand Eagle Retail is the ideal place for all your shopping needs! With fast shipping, low prices, friendly service and over 1,000,000 in stock items - you're bound to find what you want, at a price you'll love! Shipping & Delivery Times Shipping is FREE to any address in USA. Please view eBay estimated delivery times at the top of the listing. Deliveries are made by either USPS or Courier. We are unable to deliver faster than stated. International deliveries will take 1-6 weeks. NOTE: We are unable to offer combined shipping for multiple items purchased. This is because our items are shipped from different locations. Returns If you wish to return an item, please consult our Returns Policy as below: Please contact Customer Services and request "Return Authorisation" before you send your item back to us. Unauthorised returns will not be accepted. Returns must be postmarked within 4 business days of authorisation and must be in resellable condition. Returns are shipped at the customer's risk. We cannot take responsibility for items which are lost or damaged in transit. For purchases where a shipping charge was paid, there will be no refund of the original shipping charge. Additional Questions If you have any questions please feel free to Contact Us. Categories Baby Books Electronics Fashion Games Health & Beauty Home, Garden & Pets Movies Music Sports & Outdoors Toys