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Technical Brief

Hybrid Direct Carbon Fuel Cell Performance With Anode Current Collector Material

[+] Author and Article Information
Lisa Deleebeeck

Department of Energy Conversion and Storage,
Technical University of Denmark (DTU),
Risø Campus,
Frederiksborgvej 399,
P.O. Box 49,
Roskilde DK-4000, Denmark
e-mail: lisa.deleebeeck@gmail.com

Kent Kammer Hansen

Department of Energy Conversion and Storage,
Technical University of Denmark (DTU),
Risø Campus,
Frederiksborgvej 399,
P.O. Box 49,
Roskilde DK-4000, Denmark
e-mail: kkha@dtu.dk

Manuscript received October 2, 2014; final manuscript received December 7, 2015; published online January 12, 2016. Editor: Wilson K. S. Chiu.

J. Fuel Cell Sci. Technol 12(6), 064501 (Jan 12, 2016) (6 pages) Paper No: FC-14-1120; doi: 10.1115/1.4032260 History: Received October 02, 2014; Revised December 07, 2015

The influence of the current collector on the performance of a hybrid direct carbon fuel cell (HDCFC), consisting of solid oxide fuel cell (SOFC) with a molten carbonate–carbon slurry in contact with the anode, has been investigated using current–voltage curves. Four different anode current collectors were studied: Au, Ni, Ag, and Pt. It was shown that the performance of the direct carbon fuel cell (DCFC) is dependent on the current collector materials, Ni and Pt giving the best performance, due to their catalytic activity. Gold is suggested to be the best material as an inert current collector, due to its low catalytic activity.

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Figures

Grahic Jump Location
Fig. 1

Silver, gold, platinum, and nickel mesh: (a) as received, (b) following exposure to molten alkali carbonate in air (800 °C/10 hrs), and (c) following electrochemical testing

Grahic Jump Location
Fig. 2

I–V–P curves acquired between 700 and 800 °C with carbon black: (Li-K)2CO3:SiC and 96-4 N2-CO2 (22.5 L/hr) in the anode chamber of an Inconel cell house, using different anode current collectors: (a) Ni, (b) Pt, (c) Ag, and (d) Au

Grahic Jump Location
Fig. 3

(a) I–V–P curves and ((b) and (c)) Nyquist plots acquired at 785 °C with 96-4 N2-CO2 and carbon black-(Li, K)2CO3-SiC at the anode, acquired employing (b) Ni and (c) Au anode current collector meshes in an Inconel cell housing. In (b) and (c), Nyquist plots are shown without area correction (12 cm2), where points represent acquired data, while lines and arc were generated by fitting with a model circuit ((L-)Rs-RQ-RQ(-RQ)). Frequencies are given in Hz.

Grahic Jump Location
Fig. 4

(a) I–V–P curves and ((b) and (c)) Nyquist plots acquired at 800 °C with N2 and B-II-(Li, K)2CO3 at the anode, acquired employing (b) Ni and (c) Au anode current collector meshes in a stainless steel cell housing. In (b) and (c), Nyquist plots are shown without area correction (12 cm2), where points represent acquired data, while lines and arc were generated by fitting with a model circuit (Rs-RQ-RQ(-RQ)). Frequencies are given in Hz.

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