By Weidong He, Weiqiang Lv, James Dickerson
This publication presents a entire evaluate of latest learn and rising dimension applied sciences linked to gasoline delivery in reliable oxide gas cells. inside those pages, an creation to the concept that of fuel diffusion in stable oxide gas cells is gifted. This booklet additionally discusses the heritage and underlying basic mechanisms of fuel diffusion in reliable oxide gasoline cells, normal theoretical mathematical types for fuel diffusion, and standard and complex recommendations for gasoline diffusivity dimension.
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Additional info for Gas Transport in Solid Oxide Fuel Cells (SpringerBriefs in Energy)
Z. Fung, K. C. Singhal, J. Electrochem. Soc. 146, 69 (1999) 25. L. W. He, B. Wang, A current-sensor electrochemical device for accurate gas diffusivity measurement in fuel cells. J. Z. Lin, G. Waller, Y. Liu, M. P. Wong, Adv Energy Mater. T. Howells, E. New, P. S. Jones, Adv. Energy Mater. R. Moore, S. Albert-Seifried, A. Rao, S. Massip, B. J. H. R. McNeill, H. Sirringhaus, Adv. Energy Mater. J. Lee, H. H. J. Santamaria, J. Garcia-Barriocanal, A. Rivera-Calzada, M. Varela, Z. Sefrioui, E. Iborra, C.
With the measured diffusivity, the anode concentration polarization loss, and the anode limiting current can be calculated. The setup works highly efficiently; <5 min was sufficient for the sensor to read a stable voltage value . , using an electrochemical cell . Using the device, the effective binary O2–N2 diffusivity was measured with O2–N2 flow at operating conditions. In this study, the correlation among concentration and a few other important parameters, such as cathode thickness, and porosity, was studied.
The findings were surprising because larger T typically showed smaller CP for SOFCs, as 3 Diffusivity Measurement Techniques 30 Fig. 11 a Correlation between CP and cathode thickness and b correlation between CP and anode thickness. Reprinted from Ref. . Copyright (2011), with permission from Elsevier previously observed. 05 A cm−2, among the four temperatures, the anode CP at 750 °C was the largest, followed by the CPs at 800, 700, and 650 °C, respectively. For anode thicknesses above 10 mm, the anode CP increased with increasing operating temperature.