J. Fuel Cell Sci. Technol. -- February 2012 -- Volume 9, Issue 1
Quantifying
Individual Losses in a Direct Methanol Fuel Cell
Brenda L. García-Díaz, Jennifer R. Patterson,
and John W. Weidner
Department of Chemical Engineering, University
of South Carolina, Columbia, SC 29208
Abstract
The
complex interactions of kinetic and transport processes makes it difficult to
study the performance of a direct methanol fuel cell (DMFC). Changes in one aspect of the cell have
consequences in other aspects, which are difficult to elucidate from
full-cell polarization behavior.
Authors outline a strategy to use current and voltage relationships
from anode half-cells, cathode half-cells, and a hydrogen pump
coupled with methanol crossover data and a mathematical model. This makes it possible to quanitfy all the
kinetic and transport processes, and to desconstruct the cell
voltage. This data analysis accounts for all of the voltage losses
observed during the operation of the full cell.
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