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Transient operation of a solid oxide electrolysis cell

Abstract : In order to investigate the transient behaviour of a solid oxide electrolysis cell, tests were carried out on a single SOEC both under steady-state and transient conditions for 600 h. Steady-state operation was performed at the reference current of -20 A, corresponding to the thermoneutral voltage (1.28 V), whereas transient tests consisted in 1800 square waves applied over 140 cumulated hours, with a current of -1 A and -20 A as well as 0 A and -20 A. Independently from the operating conditions, the measured voltage degradation rate of 5% (70 mV)/1000 h was stable for the entire experiment. Consequently, it was concluded that an SOEC can be operated under on-off conditions with no increase of the degradation rate. This result paves the way for modular operation of a high temperature electrolyser fed with intermittent electrical energy.
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Submitted on : Tuesday, November 5, 2013 - 2:34:49 PM
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Floriane Petipas, Qingxi Fu, Annabelle Brisse, Chakib Bouallou. Transient operation of a solid oxide electrolysis cell. International Journal of Hydrogen Energy, Elsevier, 2013, 38 (7), pp.2957-2964. ⟨10.1016/j.ijhydene.2012.12.086⟩. ⟨hal-00880132⟩



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