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Citation: ZOU Yu-Man, WANG Shi-Zhong. Preparation of Sm_0.5Sr_0.5CoO₃-La_0.8Sr_0.2Ga_0.8Mg_0.15Co_0.05O₃ composite cathodes using wet-chemistry method and characterization of their properties[J]. Acta Physico-Chimica Sinica, ;2006, 22(08): 958-961. doi: 10.3866/PKU.WHXB20060810 shu

Preparation of Sm_0.5Sr_0.5CoO₃-La_0.8Sr_0.2Ga_0.8Mg_0.15Co_0.05O₃ composite cathodes using wet-chemistry method and characterization of their properties

1.
Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005,Fujian, P. R. China

Received Date: 26 January 2006
Available Online: 7 July 2006

Sm0.5Sr0.5CoO3(SSC)－La0.8Sr0.2Ga0.8Mg0.15Co0.05O3(LSGMC5) composite cathodes for intermediate temperature solid oxide fuel cells were prepared using wet-chemistry method. The Sm0.5Sr0.5CoO3(SSC) powders were prepared by the glycine-nitrate method and the La0.8Sr0.2Ga0.8Mg0.15Co0.05O3(LSGMC5) powders were synthesized by the citrate method. XRD pattern of SSC powders calcined at a temperature over 950℃ corresponded to a desired perovskite structure. With the increase in sintering temperature, the size of SSC particles increased, which leaded to a weak adhesion on electrolyte for electrodes based on SSC sintered at high temperatures. Multiple techniques were applied to characterize the oxygen reduction reaction over SSC-LSGMC5 cathodes based on SSC sintered at various temperatures（1173－1373K）. The results demonstrated that the performance of SSC-LSGMC5 composite electrodes depended strongly on the sintering temperature of SSC. Electrodes based on SSC sintered at1223K exhibited the lowest ohmic resistance and polarization resistance among the electrodes studied , and the overpotential at 973 K under 1A· cm-2 current density was as low as 0.077 V.
- Glycine-nitrate method;Solid oxide fuel cell;Sm0.5Sr0.5CoO3 Cathode;Oxygen reduction;Sintering temperature
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Preparation of Sm0.5Sr0.5CoO3-La0.8Sr0.2Ga0.8Mg0.15Co0.05O3 composite cathodes using wet-chemistry method and characterization of their properties

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通讯作者: 陈斌, bchen63@163.com

Preparation of Sm_0.5Sr_0.5CoO₃-La_0.8Sr_0.2Ga_0.8Mg_0.15Co_0.05O₃ composite cathodes using wet-chemistry method and characterization of their properties