多孔电解质固体氧化物燃料电池的制备及抗积碳性能研究

Preparation of porous electrolyte solid oxides fuel cell and study on its anti-carbon deposition properties

采用共压法制备了孔隙率约为10%的具有多孔电解质的纽扣式固体氧化物燃料电池(Porous Solid Oxide Fuel Cell,P-SOFC)。在700℃对P-SOFC和普通SOFC进行了电化学测试。结果表明,P-SOFC在运行中的电化学性能衰减程度以及阻抗增加程度为普通SOFC的3/5和1/5;在长时间运行8 h后还能保持0.85 V的高电位,普通SOFC的碳元素分布比P-SOFC聚集。由此可见,具有多孔的电解质结构能提高电池放电的可持续性和稳定性,该结构通过改变阳极氧碳比增加电池的抗积碳性能,使电池在甲烷氛围中长时间内保持稳定的功率输出。

The co-pressure method is utilized to prepare a button-type porous electrolyte-containing solid oxide fuel cell(P-SOFC)with a porosity of about 10%.Electrochemical tests are conducted on P-SOFC and ordinary SOFC,respectively at 700℃.Results show that the electrochemical performance attenuation degree and impedance increase degree of P-SOFC during operation are 3/5 and 1/5 respectively that of ordinary SOFC.P-SOFC can maintain a potential as high as 0.85 V after 8 hours of long-term operation.The ordinary SOFC has more concentrated carbon element distribution than P-SOFC.It can be seen that a porous electrolyte structure can improve the sustainability and stability of battery discharge.This structure increases the anti-carbon deposition performance of the battery through changing the ratio of oxygen to carbon at anode,allowing the battery to maintain stable power output for a long time in a methane atmosphere.