Study on low-temperature solid oxide fuel cells using y-doped bazro 3

Chang, L.a, Ji, S., Paek, J.Y., Lee, Y.H., Park, T., Cha, S.W.

Transactions of the Korean Society of Mechanical Engineers, B

Volume 36, Issue 9, 2012, Pages 931-935

[en] In this study, we fabricate and investigate low temperature solid oxide fuel cells with a ceramic substrate/porous matal/ceramic/porous metal structure. To realize low temperature operation in solid oxide fuel cells, the membrane should be fabricated to have a thickness of the order of a few hundreds nanometers to minimize IR loss Yttrium doped barium zirconate (BYZ), a proton conductor, was used as the electrolyte. We deposited a 350nm thick Pt (anode) layer on a porous substrate by sputter deposition. We also deposited a 1μm thick BYZ layer on the Pt anode using pulsed laser deposition (PLD). Finally, we deposited a 200nm thick Pt (cathode) layer on the BYZ electrolyte by sputter deposition. The open circuit voltage (OCV) is 0.806V, and the maximum power density is 11.9mW/cm’2′ at 350 .deg. C. Even though a fully dense electrolyte is deposited via PLD, a cross sectional transmission electron microscopy (TEM) image reveals many voids and defects