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|Title:||Characterization of NiO-Al₂O₃ composite and its conductivity in biogas for solid oxide fuel cell|
|Other Titles:||Characterization of NiO-Al(2)O(3) composite and its conductivity in biogas for solid oxide fuel cell|
|Citation:||Materials Science- Poland, 2016; 34(2):266-274|
|Publisher:||De Gruyter Open|
|Sarika P. Patil, L.D. Jadhav, D.P. Dubal, V.R. Puri|
|Abstract:||NiO–Al₂O₃ nanocomposite has been synthesized by mixing combustion synthesized powders. The nanocomposite is an effective anode/anode functional layer for intermediate temperature solid oxide fuel cells. The TEM of NiO and Al₂O₃ revealed spherical particles of 30 nm and platelets of 70 nm, respectively. The XRD analysis of NiO–Al₂O₃ composite sintered at 900 °C showed presence of cubic NiO and rhombohedral α-Al₂O₃ which were chemically stable. However, above 1200 °C NiAl₂O₄ started to appear. The conductivity of NiO–Al₂O₃ was the highest in hydrogen (4.3 × 10⁻³ S/cm at 600 °C). In biogas, the conductivity was 3.2 × 10⁻³ S/cm with the activation energy of 0.67 eV. The stability of the composite in biogas was also examined.|
|Keywords:||Oxides; chemical synthesis; X-ray diffraction; electrical conductivity; microstructure|
|Rights:||© Wroclaw University of Technology.|
|Appears in Collections:||Chemical Engineering publications|
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