PEM fuel cell with bipolar plate

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 138 KB
• Volume: 1
• Category: Article
• ISSN: 1464-2859
• DOI: 10.1016/s1464-2859(00)87568-9

✦ Synopsis

oxygen partial pressures 1.5, 10.2, 49.2, 100 and 286 Pa within the temperature range of 20-1050°C were studied. Nickelate oxygen desorptionlsorption spectra when heating/cooling at constant rate demonstrated strong dependence of cation composition of the samples. Unlike La,,&, ,NiO, compounds, those of La,NiO, and La,,,Sr,,NiO, have weakly bonded oxygen, capable to exchange reversibly with the gas phase at the temperatures higher than 250°C. The equilibrium values of oxygen nonstoichiometry and specific resistance for the these nickelates were determined at 300-1050°C and I',, = 1.5-286 Pa as a functions of temperature versus oxygen partial pressure. All nickelate studied appear to be ptype conductors with metal electric conductivity at equilibrium states.