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    Analysis of a Permselective Membrane Free Alkaline Direct Ethanol Fuel Cell

    Source: Journal of Fuel Cell Science and Technology:;2014:;volume( 011 ):;issue: 002::page 21009
    Author:
    Huang, Jing
    ,
    Bahrami, Hafez
    ,
    Faghri, Amir
    DOI: 10.1115/1.4025931
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A physical model is developed to study the coupled mass and charge transport in a permselective membranefree alkaline direct ethanol fuel cell. This type of fuel cell is not only free of expensive ion exchange membranes and platinum based catalysts, but also features a facile oxygen reduction reaction due to the presence of alkaline electrolyte. The proposed model is first validated by comparing its predictions to the experimental results from literature and then used to predict the overall performance of the cell and reveal the details of ion transport, distribution of electrolyte potential and current density. It is found that: (1) KOH concentration lower than 1 M notably impairs cell performance due to low electrolyte conductivity; (2) the concentration gradient and electrical field are equally important in driving ion transport in the electrolyte; (3) the current density distributions in the anode and cathode catalyst layers keep nonuniform due to different reasons. In the anode, it is caused by the ethanol concentration gradient, while in the cathode it is because of the electrolyte potential gradient; and (4) at low cell voltage, current density distribution in the catalyst layer shows stronger nonlinearity in the anode than in the cathode.
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      Analysis of a Permselective Membrane Free Alkaline Direct Ethanol Fuel Cell

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    http://yetl.yabesh.ir/yetl1/handle/yetl/155119
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    contributor authorHuang, Jing
    contributor authorBahrami, Hafez
    contributor authorFaghri, Amir
    date accessioned2017-05-09T01:09:01Z
    date available2017-05-09T01:09:01Z
    date issued2014
    identifier issn2381-6872
    identifier otherfc_011_02_021009.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/155119
    description abstractA physical model is developed to study the coupled mass and charge transport in a permselective membranefree alkaline direct ethanol fuel cell. This type of fuel cell is not only free of expensive ion exchange membranes and platinum based catalysts, but also features a facile oxygen reduction reaction due to the presence of alkaline electrolyte. The proposed model is first validated by comparing its predictions to the experimental results from literature and then used to predict the overall performance of the cell and reveal the details of ion transport, distribution of electrolyte potential and current density. It is found that: (1) KOH concentration lower than 1 M notably impairs cell performance due to low electrolyte conductivity; (2) the concentration gradient and electrical field are equally important in driving ion transport in the electrolyte; (3) the current density distributions in the anode and cathode catalyst layers keep nonuniform due to different reasons. In the anode, it is caused by the ethanol concentration gradient, while in the cathode it is because of the electrolyte potential gradient; and (4) at low cell voltage, current density distribution in the catalyst layer shows stronger nonlinearity in the anode than in the cathode.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleAnalysis of a Permselective Membrane Free Alkaline Direct Ethanol Fuel Cell
    typeJournal Paper
    journal volume11
    journal issue2
    journal titleJournal of Fuel Cell Science and Technology
    identifier doi10.1115/1.4025931
    journal fristpage21009
    journal lastpage21009
    identifier eissn2381-6910
    treeJournal of Fuel Cell Science and Technology:;2014:;volume( 011 ):;issue: 002
    contenttypeFulltext
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