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Frontiers of Chemical Science and Engineering

ISSN 2095-0179

ISSN 2095-0187(Online)

CN 11-5981/TQ

邮发代号 80-969

2019 Impact Factor: 3.552

Frontiers of Chemical Science and Engineering  2018, Vol. 12 Issue (1): 162-173   https://doi.org/10.1007/s11705-017-1642-2
  本期目录
Comparative analysis of ceramic-carbonate nanocomposite fuel cells using composite GDC/NLC electrolyte with different perovskite structured cathode materials
Muhammad I. Asghar(), Sakari Lepikko, Janne Patakangas, Janne Halme, Peter D. Lund
New Energy Technologies Group, Department of Applied Physics, Aalto University, P.O. BOX 15100, FI-00076 Aalto, Finland
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Abstract

A comparative analysis of perovskite structured cathode materials, La0.65Sr0.35MnO3 (LSM), La0.8Sr0.2CoO3 (LSC), La0.6Sr0.4FeO3 (LSF) and La0.6Sr0.4Co0.2Fe0.8O3 (LSCF), was performed for a ceramic-carbonate nanocomposite fuel cell using composite electrolyte consisting of Gd0.1Ce0.9O1.95 (GDC) and a eutectic mixture of Na2CO3 and Li2CO3. The compatibility of these nanocomposite electrode powder materials was investigated under air, CO2 and air/CO2 atmospheres at 550 °C. Microscopy measurements together with energy dispersive X-ray spectroscopy (EDS) elementary analysis revealed few spots with higher counts of manganese relative to lanthanum and strontium under pure CO2 atmosphere. Furthermore, electrochemical impedance (EIS) analysis showed that LSC had the lowest resistance to oxygen reduction reaction (ORR) (14.12 Ω·cm2) followed by LSF (15.23 Ω·cm2), LSCF (19.38 Ω·cm2) and LSM (>300 Ω·cm2). In addition, low frequency EIS measurements (down to 50 µHz) revealed two additional semi-circles at frequencies around 1 Hz. These semicircles can yield additional information about electrochemical reactions in the device. Finally, a fuel cell was fabricated using GDC/NLC nanocomposite electrolyte and its composite with NiO and LSCF as anode and cathode, respectively. The cell produced an excellent power density of 1.06 W/cm2 at 550 °C under fuel cell conditions.

Key wordselectrode    fuel cell    low-temperature    nanocomposite    perovskite
收稿日期: 2016-10-10      出版日期: 2018-02-26
Corresponding Author(s): Muhammad I. Asghar   
 引用本文:   
. [J]. Frontiers of Chemical Science and Engineering, 2018, 12(1): 162-173.
Muhammad I. Asghar, Sakari Lepikko, Janne Patakangas, Janne Halme, Peter D. Lund. Comparative analysis of ceramic-carbonate nanocomposite fuel cells using composite GDC/NLC electrolyte with different perovskite structured cathode materials. Front. Chem. Sci. Eng., 2018, 12(1): 162-173.
 链接本文:  
https://academic.hep.com.cn/fcse/CN/10.1007/s11705-017-1642-2
https://academic.hep.com.cn/fcse/CN/Y2018/V12/I1/162
No. Symmetric cells
1. (LSM+ NLC) / (GDC+ NLC) / (LSM+ NLC)
2. (LSC+ NL) / (GDC+ NLC) / (LSC+ NLC)
3. (LSF+ NLC) / (GDC+ NLC) / (LSF+ NLC)
4. (LSCF+ NLC) / (GDC+ NLC) / (LSCF+ NLC)
Tab.1  
Fig.1  
Cathode materials BET surface area
/(m2?g?1)
BJH pore volume
/(mm3?g?1)
Porosity
/%
LSM+ NLC 0.568 4.387 0.48
LSC+ NLC 0.431 2.301 0.28
LSF+ NLC 0.428 2.791 0.34
LSCF+ NLC 0.426 2.217 0.27
Tab.2  
Fig.2  
Fig.3  
Fig.4  
Fig.5  
Fig.6  
Samples L1
/µH
Relectrolyte /(W·cm2) R1
/(W·cm2)
R2
/(W·cm2)
R1+R2
/(W·cm2)
R3
/(W·cm2)
R1+R2+R3 / (W·cm2)
LSC 0.49 0.78 0.26 0.25 0.51 13.61 14.12
LSF 0.44 0.82 0.46 0.13 0.59 14.64 15.23
LSCF 0.37 0.99 0.30 0.05 0.35 19.03 19.38
Tab.3  
Fig.7  
Frequency range Exposure time in air at 550 °C Relectrolyte /(W·cm2) R1
/(W·cm2)
R2
/(W·cm2)
R1+R2
/(W·cm2)
R3
/(W·cm2)
R4
/(W·cm2)
Sum of the resistances
/(W·cm2)
100 mHz–100 kHz 0 h 0.82 0.46 0.13 0.59 14.64 ? ?
0.2 mHz–100 kHz 2 h 1.00 0.52 0.08 0.60 18.67 19.51 40.38
Cyclic voltammetry studies 200 h ? ? ? ? ? ? 39.45
(IV from Fig. 8)
50 µHz–100 kHz 280 h 0.87 0.44 0.09 0.53 8.08 23.13 33.14
Tab.4  
Fig.8  
Fig.9  
Fig.10  
L1 /µH Relectrolyte /(W·cm2) R1/(W·cm2) R2 /(W·cm2) R3 /(W?cm2)
0.57 0.18 0.15 0.13 0.44
Tab.5  
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