Đang chuẩn bị liên kết để tải về tài liệu:
Synthesis and characteristics of La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite cathode material by microwave assisted sol – gel method

In this study, LSCF 6428 was synthesized by microwave assisted sol – gel method. XRD and SEM analyses were used to determine the single-phase and nanocrystalline structure. Properties of this perovskite material including specific area, thermal expansion coefficient (TEC) and resistance of cathode were studied. | TAÏP CHÍ PHAÙT TRIEÅN KH&CN, TAÄP 19, SOÁ K6- 2016 Synthesis and characteristics of La0.6Sr0.4Co0.2Fe0.8O3-δ perovskite cathode material by microwave assisted sol – gel method Tran Thi Ngoc Mai1 Huynh Ky Phuong Ha2 Le Minh Vien2 Ngo Manh Thang2 1 University of Food Industry, HUFI-HCM Ho Chi Minh city University of Technology,VNU-HCM 2 (Manuscript Received on July 2016, Manuscript Revised on September 2016) ABSTRACT In this study, LSCF 6428 was synthesized of the material was 13.384 m2/g. The properties by microwave assisted sol – gel method. XRD and SEM analyses were used to determine the of materials were also improved by mixing with Gadolinium doped ceria (GDC) at the ratio 7:3 single-phase and nanocrystalline structure. (w/w). At this ratio, TEC of composite matched Properties of this perovskite material including specific area, thermal expansion coefficient with electrolyte. The resistance of cathode was 0.17 – 0.2 Ω in the range of temperature from (TEC) and resistance of cathode were studied. The results showed that well-crystalline 580 – 700 oC. Microwave assisted sol – gel was an easy, economical and time – saving method perovskite was obtained at microwaved of 500 W in 10 minutes, stirred at 90 oC in 2 hours and to synthesis LSCF 6428 for Single Chamber Solid oxide fuel cell (SC-SOFC) cathode calcined at 900 oC in 1 hours. The surface area application. Keywords: SC-SOFC, LSCF 6428, cathode, perovskite, microwave, sol – gel, TEC, GDC SOFCs operate at high temperature impose several challenges on reliability and long-term 1. INTRODUCTION Solid considered oxide as fuel a next cells (SOFCs) generation are stability of these fuel cells [1]. Reducing their power operating temperature is very important to commercialize SOFCs. Single Chamber - Solid generating technology because of their fuel flexibility and high overall efficiency [1]. Oxide Fuel Cell (SC-SOFC) is one kinds of Trang 41 SCIENCE & TECHNOLOGY .