乙醇在Ni-ZnO-ZrO_2-YSZ阳极SOFC上的发电性能

Power generating performances of ethanol on the SOFC with Ni-ZnO-ZrO_2-YSZ anode

为考察乙醇用于固体氧化物燃料电池的可行性,用柠檬酸溶胶-凝胶制备阳极催化材料Ni-ZnO-ZrO2,利用机械混合法制备Ni-ZnO-ZrO2-YSZ(Y2O3稳定的ZrO2)阳极。用涂覆法,在YSZ电解质上,制备了Ni-ZnO-ZrO2-YSZ/YSZ/LSM(La0.85Sr0.15MnO3)与Ni-YSZ/YSZ/LSM的单体电池。在不同蒸发器操作温度、电池操作温度和乙醇蒸气流量下,以乙醇为燃料进行发电实验,对两种阳极的电池发电性能进行比较。实验结束后,用SEM检测了两种电池阳极的表面。结果表明,Ni-ZnO-ZrO2-YSZ阳极SOFC的电池输出性能明显高于Ni-YSZ阳极,且Ni-ZnO-ZrO2-YSZ阳极具有较好的抗积炭能力。

For studying the feasibility of ethanol being used in SOFC,citric acid sol-gel is used to prepare the Ni-ZnO-ZrO2 catalyst and Ni-ZnO-ZrO2-YSZ（Yttria-stabilized zirconia）anode is prepared by mechanical mixing.The cells of Ni-ZnO-ZrO2-YSZ/YSZ/LSM（La0.85Sr0.15MnO3）and Ni-YSZ/YSZ/LSM are made on the YSZ electrolyte by coating method.Power generation was tested and compared between both anodes using ethanol as fuel at different conditions including various temperatures of evaporator and cell,and flow rates of ethanol vapor.The surfaces of the two electrodes were characterized by SEM after test.The results showed that the performances of the cell with Ni-ZnO-ZrO2-YSZ anode are better than those of the cell with Ni-YSZ anode,and Ni-ZnO-ZrO2-YSZ anode has a good ability in resistance to carbon formation at anode.