1
Supporting information
Ti-doped SrFeO3 nanostructured electrodes for Symmetric Solid Oxide Fuel Cells
L. dos Santos-Gómeza, J. M. Porras-Vázqueza, E. R. Losillaa, D. Marrero-Lópezb,*
a Universidad de Málaga, Departamento de Química Inorgánica, 29071-Málaga, Spain.b Universidad de Málaga, Departamento de Física Aplicada I, Laboratorio de Materiales y
Superficie, 29071-Málaga, Spain.
Electronic Supplementary Material (ESI) for RSC Advances.This journal is © The Royal Society of Chemistry 2015
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Figure S1. XRD patterns of Sr0.98FeO3- films prepared by spray-pyrolysis and different precursor solutions.
10 20 30 40 50 60 70 80
2 / º
nitrates
acetates
nitrates+EDTA
SrFeO3-SrFe12O19SrCO3Unidentified
***
*
*
Figure S2. Unit cell volume for SrFe1-xTixO3-series prepared in form of films by spray-pyrolysis (SP) at 650 ºC and powder by freeze-drying precursors (FD) at 1100 ºC.
0.0 0.2 0.4 0.6 0.8 1.057.5
58.0
58.5
59.0
59.5
60.0
SP FD
V / Å
3
x
SrFe1-xTixO3-
3
Figure S3. Rietveld plot of Sr0.98Fe0.8Ti0.2O3- deposited by spray-pyrolysis on CGO backbone after thermal treatment in air at 800 ºC for 2 h.
20 30 40 50 60 70 80
CGO SFT0.2
2/ º
Figure S4. XRD patterns of Sr0.98Fe0.8Ti0.2O3- deposited by spray-pyrolysis on CGO backbone after annealing in air and humidified 5%H2-Ar at 750ºC for 12 h.
20 30 40 50 60 70 80
humidified 5%H2-Ar
2/ º
air
CGOSFT0.2
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Figure S5. SEM micrograph of SrFe0.8Ti0.2O3--CGO electrodes prepared by freeze-drying precursor and deposited by screen-printing at 1100 ºC for 1 h.
10 µm
Figure S6. Cross-section micrograph of the symmetrical cell, SFT0.2-CGO/LSGM/SFTi0.2-CGO, in different regions.
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Table S1. Rp values and maximum power densities for different symmetrical electrodes using H2 as fuel. Only redox stable electrodes are included.
Electrode Electrolyte Rpair
( cm2)Rp
5%H2
( cm2) P(mWcm-2) Ref.
Sr0.98Fe0.8Ti0.2O3-δ (SP) LSGM0.04
(750 ºC)0.18
(750 ºC)700
(800 ºC)This work
Sr0.98Fe0.8Ti0.2O3-δ + 50% CGO (FD)
LSGM0.32
(750 ºC)1.15
(750 ºC)--
This work
SrFe0.75Zr0.25O3-δ + 50% CGO LSGM0.10
(750 ºC)0.17
(750 ºC)425
(800 ºC)[27]
Sr2Fe1.5Mo0.5O6-δ LSGM0.24
(780 ºC)0.27
(780 ºC)500
(800 ºC)[9]
La0.75Sr0.25Cr0.5Mn0.5O3-δ + YSZ YSZ0.60
(750 ºC)1.30
(750 ºC)550
(950 ºC)[4]
La0.7Ca0.3Cr0.97O3-δ:YSZ (1:1) YSZ0.16
(850 ºC)2.00
(850 ºC)50.7
(800 ºC)[7]
La0.4Sr0.6Co0.2Fe0.7Nb0.1O3- LSGM0.1
(800 ºC)0.28
(800 ºC)380
(800 ºC)[17]
La1/3Sr2/3(Ti1-xFex)O3±δ YSZ0.6
(950 ºC)3.0
(950 ºC)90
(950 ºC)[10]
La0.8Sr0.2Sc0.2Mn0.8O3 SSZ6.5
(850 ºC)0.35
(850 ºC)220
(850ºC)[8]
La0.6Sr0.4Fe0.9Sc0.1O3-δ LSGM0.015
(800 ºC)0.29
(800 ºC)560
(800 ºC)[13]
La0.6Sr1.4MnO4-δ LSGM2.06
(750 ºC)5.25
(750 ºC)600
(800 ºC)[15]
La0.75Sr0.25Cr0.5Mn0.5O3-δ (infiltration)
YSZ -- --200
(800 ºC)[30]