Preparation and evaluation of PTFE-bonded porous gas diffusion carbon electrodes used in phosphoric acid fuel cell applications

Ghouse, M.; Al-Boeiz, A.; Abaoud, H.; Al-Garni, M.

doi:10.1016/0360-3199(95)00129-2

Cited by 9 publications

(3 citation statements)

References 6 publications

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“…Over the past 20 years, substantial research efforts have focused on optimizing catalyst and binder loading to maximize electrode performance for traditional AFCs, phosphoric acid fuel cells, and proton exchange membrane-based fuel cells. [29][30][31][32][33][34] However, the current fuel cell design utilizes a flowing electrolyte stream that alters the electrode-electrolyte interface parameters. For example, the convecting alkaline electrolyte effectively addresses water management both with respect to removal of excess water formed at the anode and replenishment at the cathode.…”

Section: Resultsmentioning

confidence: 99%

“…The observed optimal PTFE weight percent ͑40 wt %͒ for the microfluidic hydrogen fuel cell is similar to percentages reported in the literature. [29][30][31][32][33][34] This PTFE loading of 40% was used for all subsequent studies.…”

Section: Resultsmentioning

confidence: 99%

“…The GDE was sintered under a nitrogen atmosphere at 330°C for 20 min in a preheated tube furnace ͑Lindberg/Blue͒ followed by hot pressing at a pressure of 340 psi and a temperature of 120°C. 29 The final catalyst loading was either 1 mg/cm 2 of Pt ͑50% mass Pt͒ or 4 mg/cm 2 of Ag ͑60% mass Ag͒ for the cathode and 1 mg/cm 2 of Pt ͑50% mass Pt͒ for the anode.…”

Section: Methodsmentioning

confidence: 99%

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Alkaline Microfluidic Hydrogen-Oxygen Fuel Cell as a Cathode Characterization Platform

Brushett¹,

Zhou²,

Jayashree³

et al. 2009

J. Electrochem. Soc.

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We report on an alkaline microfluidic fuel cell for catalyst and electrode characterization. Its constantly refreshing alkaline electrolyte stream enables autonomous control over the flow rate and electrolyte composition, as well as independent analysis of the individual electrodes, rendering this platform a powerful analytical tool. Here, polytetrafluoroethylene (PTFE)-bonded Ag∕C and Pt∕C cathodes are investigated and optimized using several characterization techniques, including chronoamperometry and electrochemical impedance spectroscopy. A loading of 40wt% PTFE and hot pressing of the electrodes were found to lead to the best performance. Moreover, improvements in cell performance as a function of increasing [KOH] were investigated and the dual effects of enhanced oxygen reduction reaction activity and improved ionic conductivity were decoupled. Peak power densities as high as 110mW∕cm2 were obtained, suggesting that the current alkaline fuel cell configuration may also hold promise as a microscale power source.

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