Millichamp, J*; Mason, T J*; Brandon, N P*; Brown, R J C; Maher, R C*; Manos, G*; Neville, T P*; Brett, D J L* (2013) A study of carbon deposition on solid oxide fuel cell anodes using electrochemical impedance spectroscopy in combination with a high temperature crystal microbalance. J. Power Sources, 234. pp. 14-19.

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Abstract

A novel bulk acoustic wave (BAW) microgravimetric sensor based on gallium orthophosphate is demonstrated that it is capable of operation at high temperature (up to 900 ºC). The sensor is applied to the detection of carbon deposition onto electrodeposited nickel from dry methane at 600 ºC and used as an analogue for studying the coking of solid oxide fuel cell (SOFC) anodes. The degradation of electrochemical performance due to deposition of carbon onto symmetrical SOFCs with nickel/gadolinium doped ceria electrodes is measured using electrochemical impedance spectroscopy (EIS). Direct correlation is observed between the frequency shift of the sensor and the change in resistance to charge transfer of the SOFC anode. An induction period (approx 2 h) following exposure to methane is observed where no significant carbon deposition occurs.

Item Type:	Article
Subjects:	Analytical Science Analytical Science > Trace Analysis and Electrochemistry
Identification number/DOI:	10.1016/j.powsour.2013.02.013
Last Modified:	24 Jul 2018 10:47
URI:	http://eprintspublications.npl.co.uk/id/eprint/5800

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