Study Of Anode Materials In Solid Oxide Fuel Cell

As the energy decreases increasingly, each country has done much effort to look for new style energy to ensure their energy safety. Fuel cell which is different from trandditional energy form has been in our eyes several years; it almost is industried in some countries.Solid oxide fuel cell (SOFC) is the fourth style fuel cell, low- temperature SOFC(400-600℃) has large predominance at cost and materials preparation. SOFC anode was in the middle of fuel gas and electrolyte, so the cell performance rests with the anode performance. The development of anode material was"bottleneck"of the development in SOFC. Direct carbon fuel cell uses carbon material with any form as anode; it has higher efficiency, 100% theoretically,lower cost. It uses melt-carbonate as electrolyte, and the operation temperature is at 650℃. Unfortanately it is corrosive to measurement device.In this work, some study about SOFC and DCFC were focused on .Sol-gel method was used for the preparation of transition oxide. The XRD and SEM analysis methods were used to characterize the structures and morphologies of oxide materials, from which the preparation technologies and the heat-treated temperatures were optimized. Several aims were achieved as follows:1. CeO2,CuO,NiO,CoO-Sm0.1Ce0.9O3(MO-SDC) and anode current collector materials was chosen to fabricated single cell, then were sintered to form compact cells. All of the cells had the superior performance when they were sintered at 700℃for 0.5h. But the cells made by MO-SDC were servely distorted when sintered above 750℃.2. The vapor grown carbon fibre (VGCF) which has good ion conductivity and anti-oxide at high temperature was introduced to the MO-SDCmaterial to optimize its performance, experiment results showed that when 1.25wt% VGCF-MO-SDC was used as SOFC anode, 0.326W/cm2 the power density was achieved using H2 fuel.3. Experiment results showed that the calcined temperature of MO-SDC gel had large impact on the performance of VGCF-MO-SDC anode.When the gel calcined at 550℃, 0.337 W/cm2,0.258 W/cm2 power density was achieved with H2 and methanol gas as fuel ,respectively.4. Direct carbon fuel cell (DCFC) measurement device was firstly established.