Effects of pressurization and temperature on power generating characteristics and impedances of anode-supported and electrolyte-supported planar solid oxide fuel cells

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Title:	Effects of pressurization and temperature on power generating characteristics and impedances of anode-supported and electrolyte-supported planar solid oxide fuel cells
Authors:	施聖洋;Hsieh, Y.D.;Chan, Y.H.;Shy, S.S.
Contributors:	工學院機械工程學系
Keywords:	Anode-supported cell;Cell performance;Electrochemical impedance;Electrolyte-supported cell;Power densities;Pressurized solid oxide fuel cell
Date:	2015-12-20
Issue Date:	2026-04-23 15:04:20 (UTC+8)
Publisher:	Elsevier;Elsevier B.V
Abstract:	摘要： Power generating characteristics of pressurized anode-supported cell (ASC) and electrolyte-supported cell (ESC) are measured using the same single-cell stack setup, a planar full cell sandwiched by a pair of rib-channel flow distributors. Both ASC and ESC apply the same flow rates (Qanode = 0.5 slpm H2 + 0.4 slpm N2 and Qcathode = 0.9 slpm air) measured at three operating temperatures (T = 750 °C, 800 °C, 850 °C), each T under five pressures (p = 1, 2, 3, 4, 5 atm), having a total of 30 data sets for comparison. It is found that under loaded conditions, ASC has much larger increments in power densities, about three folds higher, than ESC due to pressurization. As T increases from 750 °C to 850 °C at 0.7 V, power densities of ASC/ESC increase from 175/97 mW cm−2 to 309/193 mW cm−2 at p = 1 atm, while at p = 5 atm, the increases of power densities are 281/137 mW cm−2 to 476/250 mW cm−2, showing a stronger temperature dependence than pressurization. Corresponding electrochemical impedance spectra show that the better cell performance of ASC is attributed to both lower ohmic and polarization resistances found in ASC than that in ESC. •Pressurized anode-/electrolyte-supported planar SOFCs are measured at 750–850 °C.•At any given p (1–5 atm) and T, ASC has roughly twice higher power density than ESC.•Both ASC and ESC performance improve with increasing p and T.•ASC is more sensitive to pressurization than ESC having larger power increments.•Measured electrochemical impedances explain these ASC & ESC performance data. 出版者： Elsevier B.V 出版日期： 2015-12-20 出處： Journal of power sources, 2015-12, Vol.299, p.1-10 資源來源： ScienceDirect Journals 版權： 2015 Elsevier B.V. 識別號： ISSN: 0378-7753 識別號： EISSN: 1873-2755 識別號： DOI: 10.1016/j.jpowsour.2015.08.080
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