Fabrication and investigation of electrochemical characterization of Ba based cathodes

✍ Scribed by Z.S. Talaei; H. Salamati; A. Pakzad

• Book ID: 103832430
• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 380 KB
• Volume: 35
• Category: Article
• ISSN: 0360-3199
• DOI: 10.1016/j.ijhydene.2010.05.078

✦ Synopsis

In this paper, Ba 0.5 Sr 0.5 Co 0.8 Fe 0.2 O 3Àd (BSCF) oxide was prepared, using a solid state reaction method. Crystal structure and electrochemical conductivity of this composition were studied by x-ray diffraction and four-point probe method, respectively. The x-ray pattern shows cubic structure. The resistivity was measured from room temperature up to 450 C in air. At this condition, resistivity was dropped 99 percent of its original value. In the investigation of the electrochemical properties, D chem , chemical diffusion coefficient and E a , activation energy for hopping of small polarons were calculated by equation Arrhenius.

As our results show increasing the temperature leads to higher values of D chem . Log (D chem ) and inverse temperature were related by a negative slope.