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- Title
Preparation and Conductivity Studies of La<sub>9.33</sub>Si<sub>6</sub>O<sub>26</sub> (LSO) -Ce<sub>0.85</sub>Gd<sub>0.15</sub>O<sub>1.925</sub> (CGO15) Composite Based Electrolyte for IT-SOFC.
- Authors
NOVIYANTI, ATIEK ROSTIKA; HASTIAWAN, IWAN; EDDY, DIANA RAKHMAWATY; ADHAM, MUHAMAD BERLIAN; HARDIAN, ARIE; SYARIF, DANI GUSTAMAN
- Abstract
Reducing a high-operating temperature of solid oxide fuel cell (SOFC) to intermediate temperature SOFC (IT-SOFC, 500-750°C) poses a great challenge in the sense of developing solid electrolyte at intermediate temperature range. In response to this, we report a novel composite La9.33Si6O26 (LSO) - Ce0.85Gd0.15O1.925 (CGO) in this study. The synthesis of LSO-CGO composite was carried out by combining LSO with CGO (9:1, 8:2, and 7:3 in weight ratio) using solid state reaction method. In order to get a dense pellet, all of the products were sintered at 1500°C for 3 hours. The X-ray diffraction pattern of sintered pellets show typical patterns for both of LSO and CGO which indicate that the composite was successfully formed. The highest conductivity was detected in 7LSO-3CGO, i.e. 2.10x10-3 S cm-1 at 700oC and also has low activation energy (0.60 eV). This result suggests that the LSO-YSZ composites are good oxide ion conductors and may potentially be used as an alternative solid electrolyte in IT-SOFC technology.
- Subjects
SOLID oxide fuel cells; ELECTROLYTES; CHEMICAL energy; ELECTRICAL energy; ACTIVATION energy
- Publication
Oriental Journal of Chemistry, 2018, Vol 34, Issue 3, p2125
- ISSN
0970-020X
- Publication type
Article
- DOI
10.13005/ojc/3404053