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Development of a novel proton conducting fuel cell based on a Ni‐YSZ support
Author(s) -
Hanifi Amir R.,
Sandhu Navjot K.,
Etsell Thomas H.,
Sarkar Partha
Publication year - 2017
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15084
Subject(s) - materials science , yttria stabilized zirconia , electrolyte , cathode , dielectric spectroscopy , proton exchange membrane fuel cell , anode , non blocking i/o , sintering , chemical engineering , composite material , cubic zirconia , fuel cells , ceramic , chemistry , electrochemistry , electrode , biochemistry , catalysis , engineering
A new proton conducting fuel cell design based on the BZCYY b electrolyte is studied in this research. In high‐performance YSZ ‐based SOFC s, the Ni‐ YSZ support plays a key role in providing required electrical properties and robust mechanical behavior. In this study, this well‐established Ni‐YSZ support is used to maintain the proton conducting fuel cell integrity. The cell is in a Ni‐YSZ (375 μm support)/Ni‐ BZCYY b (20 μm anode functional layer)/ BZCYY b (10 μm electrolyte)/ LSCF ‐ BZCYY b (25 μm cathode) configuration. Maximum power density values of 166, 218, and 285 mW /cm 2 have been obtained at 600°C, 650°C, and 700°C, respectively. AC impedance spectroscopy results show values of 2.17, 1.23, and 0.76 Ω·cm 2 at these temperatures where the main resistance contributor above 600°C is ohmic resistance. Very fine NiO and YSZ powders were used to achieve a suitable sintering shrinkage which can enhance the electrolyte sintering. During cosintering of the support and BZCYYb electrolyte layers, the higher shrinkage of the support layer led to compressive stress in the electrolyte, thereby enhancing its densification. The promising results of the current study show that a new generation of proton conducting fuel cells based on the chemically and mechanically robust Ni‐YSZ support can be developed which can improve long‐term performance and reduce fabrication costs of proton conducting fuel cells.