Mesoporous NiO-samaria doped ceria for low-temperature solid oxide fuel cells.
In order to prepare anode material for low-temperature solid oxide fuel cells (SOFCs), the mesoporous NiO-SDC was synthesized using a cationic surfactant (cetyltrimethyl-ammonium bromide; CTAB) for obtaining wide triple-phase boundary (TPB). In addition, Ni-SDC anode-supported SOFC single cells with YSZ electrolyte and LSM cathode were fabricated and the performance of single cells was evaluated at 600 °C. The microstructure of NiO-SDC was characterized by XRD, EDX, SEM, and BET, and the results showed that the mesoporous NiO-SDC with 10 nm pores could be obtained. It was found that the surface area and the electrical performance were strongly influenced by the Ni content in Ni-SDC cermets. After calcined at 600 °C, the surface area of NiO-SDC was between 90-117 m2/g at 35-45 Ni wt%, which was sufficiently high for providing large TPB in SOFC anode. The optimum Ni content for cell performance was around 45 wt% and the corresponding MPD was 0.36 W/cm2. Indeed, the mesoporous NiO-SDC cermet may be of interest for use as an anode for low-temperature SOFCs.
Jin-Yeop
JY
Kim
Ji Hyeon
JH
Kim
Hyung Wook
HW
Choi
Kyung Hwan
KH
Kim
Sang Joon
SJ
Park
D003080:Cold Temperature; D009532:Nickel / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry; D012493:Samarium / Q000737:chemistry*; D014961:X-Ray Diffraction
D010087:Oxides; D012493:Samarium; D009532:Nickel; C028007:nickel monoxide