西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
网络首发:2013-02-10,
纸质出版:2013
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吴春, 陈刚, 彭勃. 中温固体氧化物燃料电池LaNiO2.5-Ba(Zr0.1Ce0.7Y0.2)O3-δ阴极的制备和表征[J]. 西安交通大学学报, 2013,47(2):92-96. DOI: 10.7652/xjtuxb201302016.
Preparation and Characterization of LaNiO2.5-Ba(Zr0.1Ce0.7Y0.2)O3-δ Composite Cathode for Intermediate Temperature Solid Oxide Fuel Cells[J]. 2013, 47(2): 92-96. DOI: 10.7652/xjtuxb201302016.
吴春, 陈刚, 彭勃. 中温固体氧化物燃料电池LaNiO2.5-Ba(Zr0.1Ce0.7Y0.2)O3-δ阴极的制备和表征[J]. 西安交通大学学报, 2013,47(2):92-96. DOI: 10.7652/xjtuxb201302016. DOI:
Preparation and Characterization of LaNiO2.5-Ba(Zr0.1Ce0.7Y0.2)O3-δ Composite Cathode for Intermediate Temperature Solid Oxide Fuel Cells[J]. 2013, 47(2): 92-96. DOI: 10.7652/xjtuxb201302016. DOI:
采用柠檬酸盐法合成了LaNiO
3
粉体
对其进行氢化物还原反应
制得具有单一结构的高氧缺位物相LaNiO
2.5
。以Ba(Zr
0.1
Ce
0.7
Y
0.2
)O
3-δ
(BZCY)为电解质制备了LaNiO
2.5
-BZCY复合阴极
利用扫描电镜对其微观结构进行了表征
并通过交流阻抗测试及直流极化测试对其电化学性能进行了研究。结果表明
LaNiO
2.5
-BZCY复合阴极在600~800 ℃范围内的极化面电阻为5.27 ~0.22 Ω·cm
2
其氧还原反应速率控制步骤为氧分子的解离以及氧原子的电荷转移。另外
该阴极的极化过电势较高
在750 ℃及电流密度为0.05 A·cm
-2
时的极化过电势为75 mV。
LaNiO
3
is synthesized by the citric acid method
and LaNiO
2.5
is prepared by hydride reduction reaction for the LaNiO
3
. Then a LaNiO
2.5
-Ba(Zr
0.1
Ce
0.7
Y
0.2
)O
3-δ
composite cathode is manufactured with Ba(Zr
0.1
Ce
0.7
Y
0.2
)O
3-δ
as the electrolyte. The microstructure of the cathode is observed by scanning electron microscopy(SEM)and the electrochemical properties are characterized by both AC
impedance and DC polarization measurements. The cathode polarization resistances get to 5.27~0.22 Ω·cm
2
in a temperature range of 600~800 ℃. The rate-limiting of oxygen reduction reaction is governed by dissociation of oxygen molecules and charge transfer of oxygen atoms. The cathode overpotential reaches relatively high as 75 mV with current density of 0.05 A·cm
-2
and at 750 ℃.
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