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Abstract:
A-site deficient (Sr0.3La0.7)1-x (Fe0.7Ti0.3)0.9Ni0.1O3-δ ((SL)1-xFTN) symmetrical electrodes with compositions x = 0.1, 0.2 and 0.3 denoted as SLFTN-01, SLFTN-02, and SLFTN-03 respectively were synthesized via modified Pechini method. The as prepared samples were further coated on LGSM electrolyte through screen-printing technique. Electrochemical performance was significantly improved for A-site deficient (SL)1-xFTN due to increased concentration of oxygen vacancy. XRD patterns revealed better reversibility for (SL)1-xFTN with rhombohedral structure. Low polarization resistance (Rp) ~0.210, 0.195 and 0.165 Ωcm2 (in dry H2) and 0.069, 0.046 and 0.043 Ωcm2 (in air) was measured for SLFTN-01, SLFTN-02, and SLFTN-03 respectively at a temperature of 750 °C. Highest conductivities ~326, 338 and 342 Scm−1 were calculated in air and the conductivities obtained in dry H2 were ~0.64, 0.81 and 1.01 Scm−1 at 700 °C. It was observed that small polaron mechanism was responsible for the decreased conductivity with the increased temperature range. The fabricated symmetrical cell ((SL)1-xFTN/LDC|LSGM|LDC/(SL)1-xFTN), maintained good stability without any degradation during the test time ~500 h (in air) and 100 h (in dry H2). The detailed investigations categorized the fabricated cells well suited as anode and cathode with improved performance and excellent stability both in oxidizing and reducing atmospheres. © 2020 Hydrogen Energy Publications LLC
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International Journal of Hydrogen Energy
ISSN: 0360-3199
Year: 2021
Issue: 12
Volume: 46
Page: 8778-8791
5 . 8 1 6
JCR@2020
ESI Discipline: ENGINEERING;
ESI HC Threshold:30
CAS Journal Grade:3
Cited Count:
WoS CC Cited Count: 10
SCOPUS Cited Count: 29
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 25
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