La0.54Sr0.4Fe0.2Co0.8O3-δ@Co0.01Ce0.79Gd0.2O2-δ functional cathode material for solid oxide fuel cell application

被引：11
作者：
Ghosh, Koyel Banerjee [1 ]
Mukhopadhyay, Jayanta [1 ]
Bysakh, Sandip [2 ]
Basu, Rajendra N. [1 ]
机构：
[1] CSIR, Cent Glass & Ceram Res Inst, Fuel Cell & Battery Div, Kolkata 700032, India
[2] CSIR, Cent Glass & Ceram Res Inst, Adv Mat Characterizat Unit, Kolkata 700032, India
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2017年 / 42卷 / 04期
关键词：
LSFC@CoCGO nanocomposite; cathode; Autocombustion Solid oxide fuel cell; Electrochemical performance; Cell stability; ENHANCED RAMAN-SPECTROSCOPY; GDC COMPOSITE CATHODES; OXYGEN REDUCTION; SURFACE MODIFICATION; LSCF CATHODE; IN-SITU; PERFORMANCE; SOFC; STABILITY; ELECTRODE;
D O I：
10.1016/j.ijhydene.2016.09.105
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A novel nanocomposite functional cathode material La0.54Sr0.40Fe0.20Co0.80O3-delta@Co0.01Ce0.79 Gd0.20O2-delta is synthesized by two-step autocombustion method for the use in solid oxide fuel cell in the temperature regime <= 800 degrees C. The calcined powder is characterized by XRD, UV-VIS, Raman spectroscopy and transmission electron microscopy for the evaluation of crystal structure, band gap, particle size and elemental distribution in support of such functional material. An interpenetrating network of LSFC surrounding the CoCGO phase is revealed by HAADF-STEM study. It exhibits high electrical conductivity (260 S cm(-1)) and low electrode polarization (0.05 Omega cm(2)) at 800 degrees C. Incorporating LSFC@CoCGO as cathode onto Ni-YSZ anode-supported cell using YSZ electrolyte and CoCGO as the buffer layer results high current density 2.88 A cm(-2) (at 0.7 V) at 800 degrees C and imparts excellent stability (<= 1%) at constant load of 0.5 A cm(-2) and 1 A cm(-2) upto 240 h. The stability of the performance is tried to correlate with the modified cathode materials. (C) 2016 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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页码：2327 / 2337
页数：11
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