Open AccessSTRUCTURE, ELECTRICAL PROPERTIES, AND APPLICATION POSIBILITY AS SOLID OXIDE FUEL CELLS CATHODE MATERIALS OF (La2NiO4±δ)1-x(BaTiO3)x(x=0.0-0.5) COMPOSITES
Author(s) -
Le Thi Anh Thư
Publication year - 2018
Publication title -
vietnam journal of science and technology/science and technology
Language(s) - English
Resource type - Journals
eISSN - 2815-5874
pISSN - 2525-2518
DOI - 10.15625/2525-2518/54/1a/11807
Subject(s) - materials science , electrical resistivity and conductivity , sintering , oxide , composite material , cathode , composite number , conductivity , metal , phase (matter) , metallurgy , chemistry , electrical engineering , organic chemistry , engineering
(La2NiO4±δ)1-x(BaTiO3)x (LNO/BTO), x=0.0, 0.05, 0.2, 0.3, 0.5 composites were prepared and investigated in structure and electrical properties. Single phase La2NiO4±δ component was obtained by sintering at 1000 oC during 12 h in air. Electrical conductivity was measured by 4-point probe method in wide temperature region above room temperature. Experiment showed that the highest conductivity was obtained in x=0.3 composite sample. Glass shell-nanocrystallite core structure of grains plays important role for this conducting enhancement. Conducting behavior of composites change from metal to semiconductor in the temperature interval of 400 to 700 oC. The LNO/BTO systems with acceptable electrical conductivity in such temperature interval are suitable for making cathode materials in solid oxide fuel cells.