Microstructural and electrochemical properties of impregnated La0.4Sr0.6Ti0.8Mn0.2O3±d into a partially removed Ni SOFC anode substrate

JOURNAL OF ALLOYS AND COMPOUNDS

卷:854

Article

Woo, Sung Hun^1,2  Baek, Seung-Wook³  Park, Dae Soo¹  Song, Kyeong Eun¹  Schlegl, Harald⁴  Park, Jun-Young⁵  Kim, Jung Hyun¹ 

[1] Hanbat Natl Univ, Dept Adv Mat Sci & Engn, 125 Dongseodae Ro, Daejeon 34158, South Korea

[2] Korea Inst Ceram Engn & Technol KICET, Energy & Environm Div, 101 Soho Ro, Jinju Si 52851, Gyeongsangnam D, South Korea

[3] Korea Res Inst Stand & Sci KRISS, Interdisciplinary Mat Measurement Inst, 267 Gajeong Ro, Daejeon 34113, South Korea

[4] Univ Lancaster, Engn Dept, Lancaster LA1 4YW, England

[5] Sejong Univ, Dept Nanotechnol & Adv Mat Engn, HMC, 209 Neungdong Ro, Seoul 05006, South Korea

关键词: Solid oxide fuel cell;    Anode;    Ni removed anode;    Electrical conductivity;    Impregnation;   

DOI  :  10.1016/j.jallcom.2020.157250

来源: Elsevier

【 摘 要 】

The microstructural and electrochemical properties of anodes obtained by impregnation of the La0.4Sr0.6Ti0.8Mn0.2O3 +/- d (LSTM) oxide system into two types of anode substrates such as Ni/8YSZ substrate (Ni (E)/8YSZ) and partially Ni removed Ni/8YSZ substrate (Ni(R)/8YSZ) were investigated in order to apply them as anode material for solid oxide fuel cells. All of the samples with LSTM impregnated on Ni (R)/8YSZ show higher electrical conductivity values than those of unimpregnated Ni (E)/8YSZ under dry H-2 condition. The highest electrical conductivity values of 2041.2, 1877.4, and 1764.3 S/cm at 700, 800 and 900 degrees C can be achieved by samples with 3 wt% impregnated LSTM on Ni (R)/8YSZ. From the XPS analysis, the existence of a Ti metal peak on the surface of LSTM was only measured for the LSTM (3 wt%)-Ni (R)/8YSZ sample, metallic titanium on the surface can improve the electrical catalytic reaction. LSTM (3 wt%)-Ni (R)/8YSZ showed higher electrical conductivity values then those of LSTM (3 wt%)-Ni (E)/8YSZ in all the temperature ranges measured in the case of dry CH 4 supply. Finally, the electrical conductivity of LSTM (3 wt%)-Ni (R)/8YSZ was stably maintained even when exposed to dry CH4 condition at 900 degrees C for a long time (100 h). (C) 2020 Elsevier B.V. All rights reserved.

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