Abstract

A novel convective flow fuel cell with porous electrodes is described. In this fuel cell design, the fuel (formic acid in sulfuric acid) flows radially outward through a thin disc anode and across a gap to a ring shaped cathode. The oxidant (potassium permanganate in sulfuric acid) is introduced into the gap and advects radially outward through the cathode. This fuel cell differs from previous designs in that the reactants flow in series rather than in parallel. The flow velocity field is examined using μPlV and shown to be nearly axisymmetric and steady. The results show that increasing the electrolyte concentration and flow rate reduce the cell Ohmic resistance and mass transport losses, resulting in larger peak power densities. An average open circuit potential of 1.2 V is obtained with maximum current and power densities of 5.35 mA cm-2 and 2.8 mW cm-2 respectively (cell electrode area of 4.3 cm-2). At a flow rate of 100 μL min-1 a fuel utilization of 58% is obtained.

Original languageEnglish (US)
Title of host publicationECS Transactions - Sensors, Actuators, and Microsystems (General) - 213th ECS Meeting
Pages21-38
Number of pages18
Edition25
DOIs
StatePublished - Dec 1 2008
EventSensors, Actuators, and Microsystems General Session - 213th Meeting of the Electrochemical Society - Phoenix, AZ, United States
Duration: May 18 2008May 23 2008

Publication series

NameECS Transactions
Number25
Volume13
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherSensors, Actuators, and Microsystems General Session - 213th Meeting of the Electrochemical Society
CountryUnited States
CityPhoenix, AZ
Period5/18/085/23/08

ASJC Scopus subject areas

  • Engineering(all)

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  • Cite this

    Salloum, K. S., Hayes, J. R., Friesen, C., & Posner, J. D. (2008). Sequential flow membraneless microfluidic fuel cell with porous electrodes. In ECS Transactions - Sensors, Actuators, and Microsystems (General) - 213th ECS Meeting (25 ed., pp. 21-38). (ECS Transactions; Vol. 13, No. 25). https://doi.org/10.1149/1.3007996