Fabrication and Performance Investigation of Three-Cell SOFC Stack Based on Anode-Supported Cells With Magnetron Sputtered Electrolyte

Abstract

A planar solid oxide fuel cell (SOFC) was fabricated using a commercial Ni/yttria-stabilized zirconia (YSZ) anode support, an YSZ/gadolinium-doped ceria (GDC) thin-film electrolyte, and a composite cathode of La0.6Sr0.4Co0.2Fe0.8O3/Gd0.1Ce0.9O1.95 (LSCF/GDC). A small, three-cell, SOFC stack is assembled using 10 cm × 10 cm single cells, metallic interconnects, and glass-based sealing. The stack performance was examined at various fuel flow rates of H2 + N2 and air at a fixed temperature of 750 °C. The three-cell stack with a crossflow design produced peak power density of 0.216 W/cm2 or about 39 W total power at 750 °C.

Anode‐supported solid oxide fuel cells with multilayer LSC/CGO/LSC cathode

“…First, the 8YSZ/GDC bilayer electrolyte was deposited onto the anode substrates using reactive dual magnetron sputtering of Zr 0.85 Y 0.15 and Ce 0.9 Gd 0.1 metal targets 300 × 100 mm 2 in size. This deposition process was described in detail in our early research [29,30]. The thickness of the 8YSZ and CGO layers was 5 and 2 μm, respectively.…”

Functionally Graded IT-MOFC Electrolytes Based on Highly Conductive δ-Bi2O3–0.2 wt % B2O3 Composite with Molten Grain Boundaries

“…The thin-film IT-MOFC electrolytes can achieve a power that is substantially higher than that of IT-MOFCs based on the matrix TeO 2 –Te 4 Bi 2 O 11 (11.5 mW cm –2 at 640 °C) and Al 2 O 3 –Na 2 W 2 O 7 (121 mW cm –2 at 750 °C) electrolytes. Recently, a number of deposition technologies have been developed to manufacture thin-film electrolytes. − Thus, the thin-film GDC/δ-Bi 2 O 3 –0.2 wt % B 2 O 3 and YSZ/δ-Bi 2 O 3 –0.2 wt % B 2 O 3 double-layer electrolytes are promising for IT-MOFC technology.…”

Influence of Deposition Modes and Thermal Annealing on Residual Stresses in Magnetron-Sputtered YSZ Membranes

“…The anode substrates 100 × 20 mm 2 in size were prepared by laser cutting from 100 × 100 mm 2 commercial anodes 700 μm thick (Kceracell Co., Chungcheongnam-Do, Korea). The electrolyte deposition process was described in [ 13 ]. It was a rather slow process, which provided a precise control for the electrolyte layer thickness and allowed fabricating very dense electrolyte films for SOFCs.…”

“…Residual stresses in the magnetron sputtered YSZ film on the SOFC anode remain largely unexplored. This is because information about the reactive magnetron sputtering of YSZ thin films large area anodes (100 × 100 mm 2 and larger) has appeared only recently [ 12 , 13 ]. In manufacturing non-stacked SOFCs of a 50 × 50 mm 2 area and smaller, residual stresses and, consequently, cell bending is not so relevant problem.…”