EFFECTS OF MOLTEN (LI-NA)2CO3 DOPING ON CREATING MIXED-ION ELECTROLYTE IN CALCIA-STABILIZED ZIRCONIA (CSZ) AND SIMULATION USING AMMONIA FUEL
A composite of calcia-stabilized zirconia (CSZ) and a binary carbonate eutectic (52 mol% Li2CO3 and 48 mol% Na2CO3) is investigated concerning its conductivity, morphology, and fuel cell performances. The conductivity is measured under air and hydrogen atmosphere, respectively. The ionic conducti...
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| Format: | Theses |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/68123 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | A composite of calcia-stabilized zirconia (CSZ) and a binary carbonate eutectic (52
mol% Li2CO3 and 48 mol% Na2CO3) is investigated concerning its conductivity,
morphology, and fuel cell performances. The conductivity is measured under air
and hydrogen atmosphere, respectively. The ionic conductivities were measured
using EIS (Electrochemical impedance spectroscopy). The results demonstrated the
mixed-ion electrolyte possesses unique simultaneous proton and oxygen ion
conduction. The highest maximum conductivities of mixed-ion electrolytes under
air and hydrogen atmosphere were 7,93 mS/cm and 7,175 mS/cm, respectively.
The mechanism of mixed-ion electrolyte is where the protons are transported in the
interface region, while oxygen ions are transported through the CSZ grains. The
single-cell was tested using hydrogen (600 sccm) as a fuel and ambient air (2000
sccm) as an oxidant. The results showed an open-circuit voltage (OCV) of 0.369;
0.379; and 0.431 V and achieved the maximum power densities of 0.23; 0.36; and
0.72 mW cm-2 at 600, 700, and 800????, respectively. Performance of SOFC from
experiment validated to simulate using ammonia fuel. The performance of ammonia
solid oxide fuel cells is lower than solid oxide fuel cells using hydrogen fuel. |
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