Pencirian fizikal dan terma komposit seramik elektrolit SDC-(Li/Na) 2CO 3

Translated title of the contribution: Physical and thermal characterisations of SDC-(Li/Na) 2CO 3 electrolyte ceramic composites

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4 Citations (Scopus)

Abstract

This paper presents the physical and thermal properties of composite electrolytes based on samarium-doped cerium (Ce 0 8Sm 0.2O 1.9, SDC) and carbonates (67 mol% Li 2CO 3/33mol% Na 2CO 3. SDC-(Li/Na) 2CO 3 composite is an excellent ionic conductor that is potentially viable for use as an electrolyte material for low temperature solid oxide fuel cells (LT-SOFC). Characterisation of the composite electrolyte includes the morphology, surface area, thermal analysis and porosity of the electrolyte pellets. The fabrication of the SDC-(Li/Na) 2CO 3 electrolyte composites were achieved in two steps: (1) preparation of the samarium-doped cerium powders by sol-gel and (2) mixing of the samarium-doped cerium with carbonates in various compositions by solid state reaction. The electrolyte pellets were compacted at different pressures (25, 50,150 and 200 MP a) and sintered at 500, 600, 700 and 800°C. The XRD results demonstrated that the introduction of carbonates did not change the SDC phase structure. FESEM images showed that the carbonate component was amorphous and well distributed in the SDC matrix. The greater the carbonate content in the composite, the smaller the surface area. Thermal analysis indicated that the melting point of the carbonate phase decreased with a reduction of the fraction of carbonate content. The optimum porosity most suitable for LT-SOFC electrolytes, 3.38% and 4.85%, were achieved for samples with carbonate content of 20% (SDC8020) and 30% (SDC7030), respectively. These were for samples sintered at 600°C and cold pressed at 200 MPa.

Original languageUndefined/Unknown
Pages (from-to)95-102
Number of pages8
JournalSains Malaysiana
Volume41
Issue number1
Publication statusPublished - Jan 2012

Fingerprint

Carbonates
Electrolytes
Composite materials
Samarium
Cerium
Solid oxide fuel cells (SOFC)
Thermoanalysis
Porosity
Hot Temperature
Phase structure
Solid state reactions
Powders
Sol-gels
Surface morphology
Melting point
Thermodynamic properties
Physical properties
Fabrication
Temperature
Chemical analysis

Keywords

  • Electrolyte composites
  • Physical and thermal characterisations
  • Pressureless sintering
  • SDC-(Li/Na) CO
  • Solid oxide fuel cells

ASJC Scopus subject areas

  • General

Cite this

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title = "Pencirian fizikal dan terma komposit seramik elektrolit SDC-(Li/Na) 2CO 3",
abstract = "This paper presents the physical and thermal properties of composite electrolytes based on samarium-doped cerium (Ce 0 8Sm 0.2O 1.9, SDC) and carbonates (67 mol{\%} Li 2CO 3/33mol{\%} Na 2CO 3. SDC-(Li/Na) 2CO 3 composite is an excellent ionic conductor that is potentially viable for use as an electrolyte material for low temperature solid oxide fuel cells (LT-SOFC). Characterisation of the composite electrolyte includes the morphology, surface area, thermal analysis and porosity of the electrolyte pellets. The fabrication of the SDC-(Li/Na) 2CO 3 electrolyte composites were achieved in two steps: (1) preparation of the samarium-doped cerium powders by sol-gel and (2) mixing of the samarium-doped cerium with carbonates in various compositions by solid state reaction. The electrolyte pellets were compacted at different pressures (25, 50,150 and 200 MP a) and sintered at 500, 600, 700 and 800°C. The XRD results demonstrated that the introduction of carbonates did not change the SDC phase structure. FESEM images showed that the carbonate component was amorphous and well distributed in the SDC matrix. The greater the carbonate content in the composite, the smaller the surface area. Thermal analysis indicated that the melting point of the carbonate phase decreased with a reduction of the fraction of carbonate content. The optimum porosity most suitable for LT-SOFC electrolytes, 3.38{\%} and 4.85{\%}, were achieved for samples with carbonate content of 20{\%} (SDC8020) and 30{\%} (SDC7030), respectively. These were for samples sintered at 600°C and cold pressed at 200 MPa.",
keywords = "Electrolyte composites, Physical and thermal characterisations, Pressureless sintering, SDC-(Li/Na) CO, Solid oxide fuel cells",
author = "Jarot Raharjo and Andanastuti Muchtar and {Wan Daud}, {Wan Ramli} and Norhamidi Muhamad and Edy Herianto",
year = "2012",
month = "1",
language = "Undefined/Unknown",
volume = "41",
pages = "95--102",
journal = "Sains Malaysiana",
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TY - JOUR

T1 - Pencirian fizikal dan terma komposit seramik elektrolit SDC-(Li/Na) 2CO 3

AU - Raharjo, Jarot

AU - Muchtar, Andanastuti

AU - Wan Daud, Wan Ramli

AU - Muhamad, Norhamidi

AU - Herianto, Edy

PY - 2012/1

Y1 - 2012/1

N2 - This paper presents the physical and thermal properties of composite electrolytes based on samarium-doped cerium (Ce 0 8Sm 0.2O 1.9, SDC) and carbonates (67 mol% Li 2CO 3/33mol% Na 2CO 3. SDC-(Li/Na) 2CO 3 composite is an excellent ionic conductor that is potentially viable for use as an electrolyte material for low temperature solid oxide fuel cells (LT-SOFC). Characterisation of the composite electrolyte includes the morphology, surface area, thermal analysis and porosity of the electrolyte pellets. The fabrication of the SDC-(Li/Na) 2CO 3 electrolyte composites were achieved in two steps: (1) preparation of the samarium-doped cerium powders by sol-gel and (2) mixing of the samarium-doped cerium with carbonates in various compositions by solid state reaction. The electrolyte pellets were compacted at different pressures (25, 50,150 and 200 MP a) and sintered at 500, 600, 700 and 800°C. The XRD results demonstrated that the introduction of carbonates did not change the SDC phase structure. FESEM images showed that the carbonate component was amorphous and well distributed in the SDC matrix. The greater the carbonate content in the composite, the smaller the surface area. Thermal analysis indicated that the melting point of the carbonate phase decreased with a reduction of the fraction of carbonate content. The optimum porosity most suitable for LT-SOFC electrolytes, 3.38% and 4.85%, were achieved for samples with carbonate content of 20% (SDC8020) and 30% (SDC7030), respectively. These were for samples sintered at 600°C and cold pressed at 200 MPa.

AB - This paper presents the physical and thermal properties of composite electrolytes based on samarium-doped cerium (Ce 0 8Sm 0.2O 1.9, SDC) and carbonates (67 mol% Li 2CO 3/33mol% Na 2CO 3. SDC-(Li/Na) 2CO 3 composite is an excellent ionic conductor that is potentially viable for use as an electrolyte material for low temperature solid oxide fuel cells (LT-SOFC). Characterisation of the composite electrolyte includes the morphology, surface area, thermal analysis and porosity of the electrolyte pellets. The fabrication of the SDC-(Li/Na) 2CO 3 electrolyte composites were achieved in two steps: (1) preparation of the samarium-doped cerium powders by sol-gel and (2) mixing of the samarium-doped cerium with carbonates in various compositions by solid state reaction. The electrolyte pellets were compacted at different pressures (25, 50,150 and 200 MP a) and sintered at 500, 600, 700 and 800°C. The XRD results demonstrated that the introduction of carbonates did not change the SDC phase structure. FESEM images showed that the carbonate component was amorphous and well distributed in the SDC matrix. The greater the carbonate content in the composite, the smaller the surface area. Thermal analysis indicated that the melting point of the carbonate phase decreased with a reduction of the fraction of carbonate content. The optimum porosity most suitable for LT-SOFC electrolytes, 3.38% and 4.85%, were achieved for samples with carbonate content of 20% (SDC8020) and 30% (SDC7030), respectively. These were for samples sintered at 600°C and cold pressed at 200 MPa.

KW - Electrolyte composites

KW - Physical and thermal characterisations

KW - Pressureless sintering

KW - SDC-(Li/Na) CO

KW - Solid oxide fuel cells

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VL - 41

SP - 95

EP - 102

JO - Sains Malaysiana

JF - Sains Malaysiana

SN - 0126-6039

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