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Thin‐Film Fuel Cells using a Sodium Silicate Binder with La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF) and LaCePr Oxides (LCP) Membranes
Author(s) -
Feng Chu,
Wang Baoyuan,
Zhu Jing,
Wang Hao,
Zhu Bin
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700469
Subject(s) - materials science , dielectric spectroscopy , sodium silicate , chemical engineering , thin film , solid oxide fuel cell , electrolyte , sintering , ceramic , silicate , electrochemistry , oxide , microstructure , substrate (aquarium) , mineralogy , composite material , nanotechnology , metallurgy , electrode , chemistry , oceanography , geology , engineering
Sodium silicate was used as a binder to prepare LaCePr oxides (LCP) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3− δ (LSCF) thin films on a Ni 0.8 Co 0.15 Al 0.05 Li oxide ceramic substrate for the first time. The microstructure, morphology, and electrical properties of the LSCF–LCP thin films were characterized and investigated by using XRD, SEM, energy‐dispersive X‐ray spectroscopy, and electrochemical impedance spectroscopy. The film sintered at 600 °C presents promising density and has been successfully applied as the electrolyte membrane for solid‐oxide fuel cells (SOFCs). Such a device achieved a respectable electrochemical performance with an open‐circuit voltage of 1.04 V and a maximum power output of 545 mW cm −2 at 575 °C. These findings suggest that sodium silicate is a suitable binder for the preparation of dense thin‐film membranes for SOFCs. Moreover, the preparation technology based on sodium silicate eliminated degumming and high‐temperature sintering, which resulted in greatly simplifying the preparation process of the thin‐film fuel cell towards potential fuel cell commercialization.