(La2NiO4±δ)1-x(BaTiO3)x (LNO/BTO), x=, , , , 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= composite sample. | Journal of Science and Technology 54 (1A) (2016) 66-71 STRUCTURE, ELECTRICAL PROPERTIES, AND APPLICATION POSIBILITY AS SOLID OXIDE FUEL CELLS CATHODE MATERIALS OF (La2NiO4±δ)1-x(BaTiO3)x(x=) COMPOSITES Le Thi Anh Thu1, Ha Thi Huong1, Nguyen Ngoc Đinh1, Huynh Đang Chinh2, Đang Thi Minh Hue2, Makio Kurisu3, Kensuke Konishi3, Bach Thanh Cong1 1 Faculty of Physics, VNU University of Science (VNU-US), 334 Nguyen Trai, Hanoi, Vietnam 2 Department of Chemistry, University of Science and Technology, 1 Dai Co Viet, Hanoi, Vietnam 3 Physics Department, Ehime University (EhU), Matsuyama, Japan * Email: lethianhthu1982@ Received: 1 September 2015; Accepted for publication: 27 October 2015 ABSTRACT (La2NiO4±δ)1-x(BaTiO3)x (LNO/BTO), x=, , , , 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 4point probe method in wide temperature region above room temperature. Experiment showed that the highest conductivity was obtained in x= composite sample. Glass shellnanocrystallite 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. Keywords: cathode, Solid Oxide Fuel Cells, LNO, BTO. 1. INTRODUCTION At present time, research on proton conducting (PC) solid oxide fuel cells (PC-SOFC) operating in the temperature region closed to the room temperature, involves much attention of investigators. There are several conducting compounds potentially to be used as cathodes materials of PC-SOFC. The first one is single-phase mixed electron – proton conductor and the other is composite having combined .
