共压直接成型法制备单腔体固体氧化物燃料电池

采用共压直接成型法制备单腔体固体氧化物燃料电池(SC-SOFC),单电池结构为Ni-YSZ/YSZ/LSM,YSZ为8%(x)Y2O3稳定的ZrO2,LSM为锰酸镧锶(La0.7Sr0.3MnO3).应用扫描电子显微镜(SEM)研究了电池微观结构,结果表明:阴极和电解质之间结合紧密,LSM在阴极YSZ三维骨架上负载性能良好;YSZ电解质薄膜厚约50μm,阳极厚约600μm,阴极层厚约100μm.研究了单电池反应温度T,阴极催化剂负载层数n,甲烷和氧气混合体积比Rmix对电池输出性能的影响规律.在T=800℃、n=2、Rmix=2时,电池性能达到最佳,开路电压为0.95V,最大电流密度为130mA·cm-2,最大功率密度为30mW·cm-2.

Preparation of Single-Chamber Solid Oxide Fuel Cell by Co-Pressing and Direct Forming Process

Co-pressing and direct forming process has been developed for the preparation of a single-chamber solid oxide fuel cell(SC-SOFC).which consists of 8%(X) Y_2O_3 -stabilized ZrO2(YSZ)electrolyte,Ni-YSZ cermet anode and La_(0.7)Sr_(0.3)MnO_3(LSM)cathode.Scanning electron microscopy(SEM)showed fight integration between the cathode and electrolyte and good loading performance of LSM on the YSZ three-dimensional framework.The thickness of the YSZ electrolyte film.the anode and the cathode was about50,600 and 100μm,respectively.The effects of temperature(7),number of catalyst loading layers(n)and the volume ratio of CH4 and O_2(R_(mix)=V(CH_4)/V(O-2))on the SC-SOFC performance was studied.At T=800 C,n=2 and R_Mix=2,the single cell performed the best,the open voltage was 0.95V.Themaximum current density Was 130 mA·cm~(-2) and the maximum power density Was 30mW·cm~(-2).