Study Of NiO-SDC+LSGM/BCY20 I(?) LT-SOFC Base On Natural Gas Composited Anode

Solid state oxide fuel cell is a device which can translate chemical energy of fuel gas into electric energy. Because it is provided with higher invert efficiency ,cleanness, no pollution ,no noises, and so on. So generally people pay close attention to it. It has been one of hot spots which many countries in the world are investigating.This task investigated mainly the preparation single cells of IT-SOFC in nature gas and made token to performance of anode in different system. We have done the following works in order to get better performance of IT-SOFC.We have investigated the preparation of power of single cells of IT-SOFC in nature gas, we have prepared powers of anode, electrolyte and cathode with sol-gel method. We have tested the powers of single cell anodes with XRD. The results of XRD showed the diameter of these powers are between 4-35nm. We fabricated singles cells with by dry-pressing process. The composited anode was NiO-SDC+LSGM, the electrolyte was LSGM, the composited cathode was GDC+LSCF. The cathode was fabricated by spreading method. Tested these single cells electrochemistry performance.The single cell NiO-SDC+LSGM(3:2)had the best electrochemistry performance, The composited-anode cell of maximum current density and power density were 229.32mA/cm2 and 45.86mW/cm2 respectively at 600℃. Utilized the scanning electron microscope(SEM) observed the microstructure of cells. Tested these Utilized X-ray diffraction analyzed the crystal forms of the powder of the anode cells. The results showed LSGM has reacted with NiO when the rate of composition of LSGM:SDC greater than 3:2. Fabricated single cells with by second dry-pressing process. The composited anode was NiO-SDC+BCY20, the electrolyte was BCY20, the composited cathode was GDC+LSCF. The cathode was fabricated by spreading method. Tested these single cells electrochemistry behaviors. The single cell NiO-SDC+BCY20 ( 2:3 ) had the best electrochemistry performance, The composited-anode cell of maximum current density and power density were 262.8mA/cm2 and 53.3mW/cm2 respectively at 650℃. Utilized the scanning electron microscope(SEM) observed the microstructure of cells. Found cells fabricated with second dry-pressing process has better interface of three phases. Utilized X-ray diffraction analyzed the crystal forms of the powder of the anode cells. Every components of composited anode did not react. Every components existent with their own phase. Investigated behavior of anode sintering. Tested the transfer number of composited anode. The result showed when the rate of SDC:BCY20 is 2:3 the single cell has better electrochemistry performance.