Enhanced electrochemical activity and long-term stability of Ni–YSZ anode derived from NiO–YSZ interdispersed composite particles

Smart Powder Processing for Advanced Materials

“…The micrograph indicated successful fabrication of the IC particles. NiO and YSZ nanoparticles were well dispersed and their sizes were in good agreement with those estimated from the specific surface area of starting particles (NiO: 160 nm and YSZ: 75nm) 24) . Fig.…”

“…The grain size was kept at about 0.5 m, and no abnormally large grain was obser ved. The insignificant micro-structural change indicated that grain growth of Ni was insignificant in the anode made of IC particles under the testing conditions 24) . 24) .…”

“…The insignificant micro-structural change indicated that grain growth of Ni was insignificant in the anode made of IC particles under the testing conditions 24) . 24) . It indicated that careful control of microstructure by the use of composite particles as starting materials was very important for improving the performance of anode.…”

“…Prefabrication of the composite particles followed by electrode forming using particle bonding process is an ideal way to go, especially for controlling the microstructure of composite electrodes. Recently, we successfully fabricated various kinds of composite particles such as large core-particles coated with nanoparticles and inter-dispersed composite mixture consisting of several kinds of nanoparticles using the particle bonding technique [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24] . Nickel-yttria stabilized zirconia (Ni-YSZ) is the most widely used SOFC anode material due to its excellent electrochemical properties at high temperatures.…”

“…For example, Fig. 5 showed NiO-YSZ inter-dispersed composite particles (IC) consisting of NiO and YSZ nanopar ticles 24) .…”