Reduction of Electrode Polarization in Anode-Supported Solid Oxide Fuel Cell

Meepho, Malinee; Aungkavattana, Pavadee; Wattanasiriwech, Suthee

doi:10.1016/j.egypro.2015.11.484

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…All fuel cell processes occur in this 1layer structure unlike in a conventional 3-layer structure, where each layer has a distinctive function for electrode reactions, electron separation, and ionic transport, etc. Surprisingly, power densities up to 1 Wcm -2 (with H2 at 550 o C) have been reported using the single layer cell configuration [12][13][14], which is beyond the power density of a standard 3-layer solid oxide fuel cell based on yttrium stabilized zirconia (YSZ) or samarium/gadolinium doped ceria (SDC/GDC) electrolyte with perovskite structured electrodes such as lanthanum strontium manganite (LSM) and lanthanum strontium cobalt ferrite (LSCF) [16][17][18]. However, the spread of reported performance is large in the range 200-1,000 mWcm -2 even under similar operational conditions.…”

Section: Introductionmentioning

confidence: 99%

Wide bandgap oxides for low-temperature single-layered nanocomposite fuel cell

et al. 2018

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A composite of wide bandgap lithium-nickel-zinc-oxide (LNZ) and gadolinium-doped-cerium-oxide (GDC) was systematically analyzed for a low-temperature nanocomposite fuel cell in a so-called single-component configuration in which the electrodes and electrolyte form a homogenous mixture. We found that the operational principle of a single-layer fuel cell can be explained by electronic blocking by the oxide mixture with almost insulator-like properties in the operating voltage regime of the fuel cell, which will prevent short-circuiting, and by its catalytic properties that drive the fuel cell HOR and ORR reactions. The resistance to charge transport and leakage currents are dominant performance limiting factors of the single-component fuel cell. A test cell with Au as current collector reached a power density of 357 mWcm-2 at 550 o C. Changing the current collector to a Ni0.8Co0.15Al0.05LiO2 (NCAL) coated Ni foam produced 801 mWcm-2 , explained by better catalytic properties. However, utilizing NCAL coated Ni foam may actually turn the 1-layer fuel cell device into a traditional 3-layer (anode-electrolyte-cathode) structure. This work will help in improving the understanding of the underlying mechanisms of a single-layer fuel cell device important to further develop this potential energy technology.

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