Effect of 20 mol % gadolinium doping on oxide ion conductivity of ceria as electrolyte for intermediate temperature solid oxide fuel cells

被引:21
作者
Momin, Naeemakhtar [1 ]
Manjanna, J. [1 ]
Aruna, S. T. [2 ]
Kumar, S. Senthil [2 ]
Anjaneya, K. C. [3 ]
机构
[1] Rani Channamma Univ, Dept Chem, Belagavi 591156, Karnataka, India
[2] CSIR, Natl Aerosp Labs, Surface Engn Div, Bengaluru 560017, India
[3] DVS Coll Arts & Sci, Dept Chem, Shimoga 577201, Karnataka, India
关键词
IT-SOFCs; Gd-doped ceria; Electrolyte; Oxide ion conductivity; GD-DOPED CERIA; ELECTRICAL-PROPERTIES; CEO2; NANOPARTICLES; OPTICAL-PROPERTIES; OXYGEN VACANCIES; SIZE; PHOTOLUMINESCENCE; NANOSTRUCTURE; SCATTERING; BEHAVIOR;
D O I
10.1016/j.ceramint.2022.08.169
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The gadolinium-doped ceria is investigated as electrolyte materials for intermediate temperature solid oxide fuel cells (IT-SOFCs) due to its oxide ion conductivity. The doping of Gd3+ to Ce4+ can introduce a small strain in the lattice thereby improved conductivity with low activation energy is expected. The 20 mol. % gadolinium doped ceria (Ce0.8Gd0.2O2-delta) nanocrystalline powder is prepared here by citrate -complexation method. The XRD, Rietveld refinement, FTIR, UV-Visible, FESEM/EDX, and a c -impedance techniques are used to characterize this sample. The oxide ion conductivity is determined between 523 -1023 K. The Ce0.8Gd0.2O2-delta shows highest oxide ion conductivity of 6.79 x 10-3 S cm-1 and 1.11 x 10-2 S cm -1 at 973 K and 1023 K, respectively. The Ce0.8Gd0.2O2-delta showed lower activation energies of 1.09, 0.70, and 0.88 eV for grain, grain boundary, and total conduction, respectively. Thus, the nano crystalline Ce0.8Gd0.2O2-delta is proposed as potential electrolyte for ITSOFCs.
引用
收藏
页码:35867 / 35873
页数:7
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