A Novel Direct Carbon Fuel Cell Concept

[+] Author and Article Information
Sneh L. Jain

School of Chemistry, University of St. Andrews, Kingdom of Fife, Scotland KY16 9ST, UKslj2@st-andrews.ac.uk

J. Barry Lakeman, Kevin D. Pointon

 Dstl Porton Down, Salisbury, Wilts SP4 0QR, UK

John T. S. Irvine

School of Chemistry, University of St. Andrews, Kingdom of Fife, Scotland KY16 9ST, UKjtsi@st-andrews.ac.uk

J. Fuel Cell Sci. Technol 4(3), 280-282 (Jun 28, 2006) (3 pages) doi:10.1115/1.2743073 History: Received January 05, 2006; Revised June 28, 2006

This paper describes a direct carbon fuel cell (DCFC) based on a solid oxide fuel cell (SOFC) system which has been used to assess the performance of a high surface area carbon fuel material. The cell, consisting of a co-fired anode, electrolyte, and cathode, has been produced by standard tape casting methods and is of tubular geometry. The operating conditions of the cell require a 62mol%Li2CO3 and 38mol%K2CO3 eutectic secondary electrolyte and the operation of the cell is described over the temperature range 525700°C. The cell performance has been examined by standard electrochemical methods.

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Figure 4

Impedance spectra collected at: (i) (a) 525°C (solid line) and (b) 550°C (dotted line); (ii) (a) 600°C (solid line) and (b) 650°C (dotted line); (iii) 700°C (a) initial measurement (solid line); (b) after 1mA, 12h galvanostatic measurement (dotted line); (c) after 10h5mA galvanostatic measurement (dotted and dashed line); and (vi) I-V curves for each temperature

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Figure 3

Model circuit used for low temperatures (525°C and 550°C)

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Figure 2

SEM images of: (a) Ni anode; (b) YSZ; and (c) LSM cathode and current collector

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Figure 1

Cell components and construction of short tubes: (a)NiO anode (gold current collector attached here); (b) YSZ electrolyte; (c) LSM/YSZ composite cathode; and (d) LSM (current collector) (silver wire attached around outside)




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