摘要
采用甘氨酸-硝酸盐法(GNP)合成了Pr、Sm、Gd共掺杂的CeO2 基PrxGdxSm0.2-2xCe0.8O2-δ(PGSC0、PGSC2、PGSC4、PGSC6、PGSC8、PGSC10,x=0、0.02、0.04、0.06、0.08、0.10)电解质材料,并对其电化学性能进行了表征.XRD测试结果表明,PGSC电解质在600℃煅烧10h后均形成立方萤石结构.拉曼光谱测试结果表明,Sm、Pr、Gd共掺杂可以有效提高氧空位浓度.PGSC10 电解质在800℃时电导率约为0.1 S·cm-1,与Sm0.2Ce0.8O1.9(SDC)(0.115 S·cm-1)电解质大致相同,而在700℃以下,PGSC10 电解质的电导率约为 SDC 的 1.5 倍,其活化能为 0.377 eV,也明显低于 SDC(0.626 eV).因此,PGSC10 是一种很有前途的中温固体氧化物燃料电池电解质材料.
Abstract
CeO2-based PrxGdxSm0.2-2xCe0.8O2-δelectrolyte materials(PGSC0,PGSC2,PGSC4,PGSC6,PGSC8,PGSC10,x = 0,0.02,0.04,0.06,0.08,0.10)co-doped with Pr,Sm and Gd were synthesized by glycine-nitrate method(GNP),and their electro-chemical properties were characterized.XRD results show that PGSC electrolyte forms cubic fluorite structure after calcination at 600℃for 10 h.Raman spectroscopy test results show that co-doping of Sm,Pr and Gd can effectively increase the oxygen vacancy concentra-tion.At 800℃,the conductivity of PGSC10 electrolyte is about 0.1 S·cm-1,which is roughly the same as that of Sm0.2Ce0.8O1.9(SDC)(0.115 S·cm-1)electrolyte,while below 700℃,the conductivity of PGSC10 electrolyte is about 1.5 times that of SDC,and its activa-tion energy is 0.377 eV.It is also significantly lower than SDC(0.626 eV).Therefore,PGSC10 is a promising medium temperature solid oxide fuel cell electrolyte material.
基金项目
吉林省发改委创新能力建设项目(2021C037-4)
吉林省科技厅科技发展计划项目(20230101289JC)
NETL
NSTL
万方数据