High-temperature passive direct methanol fuel cells operating with concentrated fuels

Abstract Conventionally, passive direct methanol fuel cells (DMFC) are fed with diluted methanol solutions and can hardly be operated at elevated temperatures (>120 °C) because the ionic conductivity of Nafion-type proton exchange membranes depends strongly on water content. Such a system design would limit its energy density and power density in mobile applications. In this communication, a passive vapor feed DMFC capable of operating with concentrated fuels at high temperatures is reported. The passive DMFC proposed in this work consists of a fuel reservoir, a perforated silicone sheet, a vapor chamber, two current collectors and a membrane electrode assembly (MEA) based on a phosphoric acid doped polybenzimidazole (PBI) membrane. The experimental results reveal that the methanol crossover through a PBI membrane is substantially low when compared with the Nafion membranes and the PBI-based passive DMFC can yield a peak power density of 37.2 mW cm−2 and 22.1 mW cm−2 at 180 °C when 16 M methanol solutions and neat methanol are used respectively. In addition, the 132 h discharge test indicates that the performance of this new DMFC is quite stable and no obvious performance degradation is observed after activation, showing its promising applications in portable power sources.

[1]  Shimshon Gottesfeld,et al.  Methanol transport through Nafion membranes : Electro-osmotic drag effects on potential step measurements , 2000 .

[2]  S. Jiang,et al.  Phosphoric acid functionalized pre-sintered meso-silica for high temperature proton exchange membrane fuel cells. , 2013, Chemical communications.

[3]  Rong Chen,et al.  Enhancement of water retention in the membrane electrode assembly for direct methanol fuel cells ope , 2010 .

[4]  Keith Scott,et al.  Engineering aspects of the direct methanol fuel cell system , 1999 .

[5]  Jinhwan Kim,et al.  Proton conductivities and methanol permeabilities of membranes made from partially sulfonated polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene copolymers , 2002 .

[6]  I. Hsing,et al.  Composite Nafion/polyvinyl alcohol membranes for the direct methanol fuel cell , 2002 .

[7]  Robert F. Savinell,et al.  On‐Line FTIR Spectroscopic Investigations of Methanol Oxidation in a Direct Methanol Fuel Cell , 1997 .

[8]  Chaoyang Wang,et al.  High concentration methanol fuel cells: Design and theory , 2010 .

[9]  A. Faghri,et al.  Effect of the cathode open ratios on the water management of a passive vapor-feed direct methanol fu , 2011 .

[10]  B. Smitha,et al.  Polyelectrolyte Complexes of Chitosan and Poly(acrylic acid) As Proton Exchange Membranes for Fuel Cells , 2004 .

[11]  Sung Min Cho,et al.  Hydrogels in methanol fuel cartridge used as a diffusion-rate-controlling agent suppressing the methanol crossover in passively operated flat-pack type DMFCs , 2006 .

[12]  K. Scott,et al.  High Temperature Direct Methanol Fuel Cell Based on Phosphoric Acid PBI Membrane , 2011 .

[13]  Amir Faghri,et al.  Water management of the DMFC passively fed with a high-concentration methanol solution , 2010 .

[14]  Y. Sung,et al.  A Pd-impregnated nanocomposite Nafion membrane for use in high-concentration methanol fuel in DMFC , 2003 .

[15]  T. Zhao,et al.  A sandwich structured membrane for direct methanol fuel cells operating with neat methanol , 2013 .

[16]  Piercarlo Mustarelli,et al.  Polymer fuel cells based on polybenzimidazole/H3PO4 , 2012 .

[17]  Suzana P. Nunes,et al.  Inorganic modification of proton conductive polymer membranes for direct methanol fuel cells , 2002 .

[18]  Paulo Ribeirinha,et al.  Single wall nanohorns as electrocatalyst support for vapour phase high temperature DMFC , 2012 .

[19]  R. Savinell,et al.  Electro‐osmotic Drag Coefficient of Water and Methanol in Polymer Electrolytes at Elevated Temperatures , 1996 .

[20]  Adélio Mendes,et al.  Activation procedures characterization of MEA based on phosphoric acid doped PBI membranes , 2010 .

[21]  Rong Chen,et al.  Small direct methanol fuel cells with passive supply of reactants , 2009 .

[22]  Mohammad Ali Abdelkareem,et al.  Control of methanol transport and separation in a DMFC with a porous support , 2006 .

[23]  L. Jörissen,et al.  Novel anode based on sulfonated polysulfone for medium temperature direct methanol fuel cells , 2013 .

[24]  Jari Ihonen,et al.  A rapid break-in procedure for PBI fuel cells , 2009 .

[25]  Jesse S. Wainright,et al.  Conductivity of PBI Membranes for High-Temperature Polymer Electrolyte Fuel Cells , 2004 .

[26]  T. Zhao,et al.  Effect of water concentration in the anode catalyst layer on the performance of direct methanol fuel cells operating with neat methanol , 2012 .

[27]  Robert F. Savinell,et al.  High temperature proton exchange membranes based on polybenzimidazoles for fuel cells , 2009 .

[28]  P. Cañizares,et al.  PBI-based polymer electrolyte membranes fuel cells: Temperature effects on cell performance and catalyst stability , 2007 .

[29]  Waldemar Bujalski,et al.  High temperature (HT) polymer electrolyte membrane fuel cells (PEMFC) – A review , 2013 .

[30]  Pablo Cañizares,et al.  Performance of a Vapor-Fed Polybenzimidazole (PBI)-Based Direct Methanol Fuel Cell , 2008 .

[31]  D. Wilkinson,et al.  Performance of the Vapor Fed Direct Alcohol Phosphoric Acid Fuel Cell , 2012 .

[32]  M. S. Masdar,et al.  Improvement of water management in a vapor feed direct methanol fuel cell , 2010 .

[33]  J. Garche,et al.  New membranes for direct methanol fuel cells , 2002 .

[34]  Tianshou Zhao,et al.  Characteristics of water transport through the membrane in direct methanol fuel cells operating with , 2011 .

[35]  Rong Chen,et al.  Towards operating direct methanol fuel cells with highly concentrated fuel , 2010 .

[36]  A. Casalegno,et al.  On the activation of polybenzimidazole-based membrane electrode assemblies doped with phosphoric acid , 2012 .

[37]  Liangliang,et al.  Single passive direct methanol fuel cell supplied with pure methanol , 2011 .

[38]  Xiaohui Yan,et al.  Effects of design parameters on the performance of passive direct methanol fuel cells fed with concentrated fuel , 2014 .

[39]  Amir Faghri,et al.  Review and advances of direct methanol fuel cells (DMFCs) part I: Design, fabrication, and testing with high concentration methanol solutions , 2013 .

[40]  Hae-Kyoung Kim,et al.  Passive direct methanol fuel cells fed with methanol vapor , 2006 .

[41]  Changpeng Liu,et al.  The function of hydrophobic cathodic backing layers for high energy passive direct methanol fuel cel , 2011 .

[42]  Tianshou Zhao,et al.  Effect of the cathode gas diffusion layer on the water transport behavior and the performance of passive direct methanol fuel cells operating with neat methanol , 2011 .

[43]  Jesse S. Wainright,et al.  Acid-doped polybenzimidazoles : a new polymer electrolyte , 1995 .

[44]  James M. Fenton,et al.  Composite silica/Nafion® membranes prepared by tetraethylorthosilicate sol-gel reaction and solution casting for direct methanol fuel cells , 2006 .

[45]  Amir Faghri,et al.  Improving the water management and cell performance for the passive vapor-feed DMFC fed with neat me , 2011 .

[46]  Weiwei Yang,et al.  Characteristics of heat and mass transport in a passive direct methanol fuel cell operated with concentrated methanol , 2012 .

[47]  Rong Chen,et al.  A microfluidic-structured flow field for passive direct methanol fuel cells operating with highly concentrated fuels , 2010 .