<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ghosh, P. C.</style></author><author><style face="normal" font="default" size="100%">Wuester, T.</style></author><author><style face="normal" font="default" size="100%">Dohle, H.</style></author><author><style face="normal" font="default" size="100%">Kimiaie, N.</style></author><author><style face="normal" font="default" size="100%">Mergel, J.</style></author><author><style face="normal" font="default" size="100%">Stolten, D.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Analysis of single PEM fuel cell performances based on current density distribution measurement</style></title><secondary-title><style face="normal" font="default" size="100%">Journal of Fuel Cell Science and Technology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">current density distribution</style></keyword><keyword><style  face="normal" font="default" size="100%">fuel cell performance</style></keyword><keyword><style  face="normal" font="default" size="100%">PEFC</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2006</style></year><pub-dates><date><style  face="normal" font="default" size="100%">AUG</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">3</style></number><publisher><style face="normal" font="default" size="100%">Univ Perugia; Italian Agcy New Technol &amp; Environm; Amer Soc Mech Engineers</style></publisher><pub-location><style face="normal" font="default" size="100%">THREE PARK AVE, NEW YORK, NY 10016-5990 USA</style></pub-location><volume><style face="normal" font="default" size="100%">3</style></volume><pages><style face="normal" font="default" size="100%">351-357</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;A new in situ measurement method of mapping the current density distribution in polymer electrolyte fuel cells (PEFC) is used to analyze the performance of a fuel cell under different operating conditions. The present method is useful in investigating the current density distribution in a single cell as well as a stack, which carries the information about the local reactant activity over the electrode area It was found that the current density close to the gas inlets is strongly influenced by the reactants' relative humidity. The performance close to the gas outlets is greatly influenced by the inlet gas pressures and the stoichiometry factors of the reactant gases, mainly on the cathode side. It was also observed that the performance of the fuel cell drops with the increase in operating temperature if the reactant gases are not sufficiently humidified.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">3</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><notes><style face="normal" font="default" size="100%">1st Conference on European Fuel Cell Technology and Applications (EFC2005), Rome, ITALY, DEC 14-16, 2005</style></notes><custom3><style face="normal" font="default" size="100%">&lt;p&gt;Foreign&lt;/p&gt;</style></custom3><custom4><style face="normal" font="default" size="100%">0.711</style></custom4></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Dohle, H.</style></author><author><style face="normal" font="default" size="100%">Mergel, J.</style></author><author><style face="normal" font="default" size="100%">Ghosh, P. C.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">DMFC at low air flow operation: study of parasitic hydrogen generation</style></title><secondary-title><style face="normal" font="default" size="100%">Electrochimica Acta</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">DMFC</style></keyword><keyword><style  face="normal" font="default" size="100%">Efficiency</style></keyword><keyword><style  face="normal" font="default" size="100%">electrolytic hydrogen evolution</style></keyword><keyword><style  face="normal" font="default" size="100%">oxygen depletion</style></keyword><keyword><style  face="normal" font="default" size="100%">side-effects</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2007</style></year><pub-dates><date><style  face="normal" font="default" size="100%">MAY</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">19</style></number><publisher><style face="normal" font="default" size="100%">PERGAMON-ELSEVIER SCIENCE LTD</style></publisher><pub-location><style face="normal" font="default" size="100%">THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND</style></pub-location><volume><style face="normal" font="default" size="100%">52</style></volume><pages><style face="normal" font="default" size="100%">6060-6067</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;In this paper, the effect of hydrogen generation in direct methanol fuel cells (DMFC) is described. Under certain operating conditions hydrogen generation occurs in DMFC causing an additional methanol consumption and a decrease of the cell voltage. For the present experiments a segmented cell with an active area of 244 cm 2 is used. The cell has 196 segments which are regularly distributed on the whole area. By this experimental setup hydrogen generation was found in regions with insufficient air supply. Hydrogen generation was analyzed by systematically applying different air flow rates and detecting the local current densities. The theory for hydrogen generation is confirmed by the results obtained from the segmented cell. A correlation between open circuit voltage (OCV), air flow rate and hydrogen generation was observed. Furthermore, half-cell measurements with different methanol concentrations were performed and used for analyzing the processes during hydrogen generation. The work clearly indicates the importance of sufficient cathode air supply for DMFC. Starved cathode areas not only do not contribute to the overall current generation but in addition reduce the power and efficiency by the parasitic generation of hydrogen. (C) 2007 Elsevier Ltd. All rights reserved.&lt;/p&gt;</style></abstract><issue><style face="normal" font="default" size="100%">19</style></issue><work-type><style face="normal" font="default" size="100%">Article</style></work-type><custom3><style face="normal" font="default" size="100%">Foreign</style></custom3><custom4><style face="normal" font="default" size="100%">4.803</style></custom4></record></records></xml>