Nb掺杂SFM作为SOFC对称电极材料的可行性分析

Feasibility Analysis of Nb Doped SFM as a Symmetric Electrode Material for SOFC

随着“碳达峰”“碳中和”日益受到关注,可再生能源发电并网技术得到迅速发展。为改善钙钛矿氧化物材料作为固体氧化物燃料电池电极的电化学性能,用铌元素掺杂在钙钛矿氧化物材料的铁位来作为固体氧化物燃料电池对称电极材料。结果表明,当掺杂量为0.05时电导率最大,为28S·cm^(-1),且与所需活化能最小的结果一致;经过铌元素的掺杂,钙钛矿氧化物材料的电化学性能得到了明显的改善,当铌掺杂量为0.05时,材料的阻值最小,为0.080Ω·cm^(2);在650℃、700℃、750℃和800℃时,电池的功率密度分别为0.25W·cm^(-2)、0.40W·cm^(-2)、0.56W·cm^(-2)和0.71W·cm^(-2)。

With the"carbon peak"and"carbon neutrality"receiving increasing attention,renewable energy generation grid connection technology has rapidly developed.To improve the electrochemical performance of perovskite oxide materials as electrodes for solid oxide fuel cells,niobium doped iron sites in perovskite oxide materials were studied as symmetric electrode materials for solid oxide fuel cells.The results show that when the doping amount of niobium is 0.05,the conductivity is the highest at 28S·cm^(-1),which is consistent with the result of the minimum required activation energy;After doping with niobium element,the electrochemical performance of perovskite oxide materials has been significantly improved.When the niobium doping amount is 0.05,the resistance value of the material is the smallest,which is 0.080Ωcm^(2);At 650℃,700℃,750℃,and 800℃,the power density of the battery is 0.25W·cm^(-2),0.40W·cm^(-2),0.56W·cm^(-2),and 0.71W·cm^(-2),respectively.