Zirconia- and ceria-based electrolytes for fuel cell applications: critical advancements toward sustainable and clean energy production

Maiti, Tushar Kanti; Majhi, Jagannath; Maiti, Subrata Kumar; Singh, Jitendra; Dixit, Prakhar; Rohilla, Tushita; Ghosh, Samaresh; Bhushan, Sakchi; Chattopadhyay, Sujay

doi:10.1007/s11356-022-22087-9

Cited by 27 publications

(9 citation statements)

References 163 publications

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“…8−11 It is noted that in reducing atmospheres, Ce 4+ readily transitions to Ce 3+ , leading to electronic conductivity that subsequently diminishes cell performance. 12 This limitation can be mitigated by maintaining operational temperatures for reduced-temperature applications of LT and IT-SOFCs. The electronic conductivity can be minimized at reduced temperatures, where the oxygen ion transfer number is high enough for SOFCs.…”

Section: Introductionmentioning

confidence: 99%

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Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells

Zhang,

Jiang,

Zhu

et al. 2024

ACS Appl. Mater. Interfaces

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Ceria-based oxides, such as samaria-doped ceria (SDC), are potential electrolytes for low-to-intermediate-temperature solid oxide fuel cells (SOFCs). The sinterability of these materials can be improved by adding iron as the sintering aid. This work reveals that Fe is soluble in SDC, forming an Fe-doped SDC solid solution. It is found that the solubility is affected by the sintering temperature. Fe doping has obvious effects on electrolyte properties, including sintering characteristics, thermal expansion behaviors, and electrical conductivities in both air and hydrogen atmospheres. The conductivity obviously increases while the activation energy decreases by doping Fe. Compared with that of the bare SDC electrolyte, the performance of the single cell with the Fe-doped SDC is enhanced; for example, the peak power density is increased by 52.8% to 0.726 W cm −2 at 600 °C when humidified hydrogen is used as the fuel and ambient air is used as the oxidant. The single cell showed stable operation at 600 °C under a constant current density of 0.3 A cm −2 for 150 h. Therefore, the Fe-doped SDC solid solution shows promise as a potential electrolyte for low-to-intermediatetemperature SOFCs.

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Section: Introductionmentioning

confidence: 99%

“…It is noted that in reducing atmospheres, Ce 4+ readily transitions to Ce 3+ , leading to electronic conductivity that subsequently diminishes cell performance . This limitation can be mitigated by maintaining operational temperatures for reduced-temperature applications of LT and IT-SOFCs.…”

Section: Introductionmentioning

confidence: 99%

Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells

Zhang,

Jiang,

Zhu

et al. 2024

ACS Appl. Mater. Interfaces

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“…Therefore, the electrolyte operating at lower temperatures with high ionic conductivity is of paramount importance for extensive applications of both SOECs and SOFCs. Several materials are being investigated as electrolytes for intermediate temperature (500–800 °), such as doped ceria [5] and doped perovskite type LaGaO 3 , [6] and apatite lanthanum silicate (LSO) [7] . Gadolinium‐doped cerium (GDC) is considered as a favourable electrolyte due to its higher ionic conductivity than YSZ at intermediate temperatures [8] .…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Densification of Mo/Mg Co‐Doped Apatite‐type Lanthanum Silicate Electrolytes with Enhanced Ionic Conductivity

Cai

Horri

2023

Chemistry A European J

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Apatite-type lanthanum silicate (LSO) electrolyte is one of the most promising candidates for developing intermediate-temperature solid oxide electrolysis cells and solid oxide full cells (IT-SOECs and SOFCs) due to its stability and low activation energy. However, the LSO electrolyte still suffers from unsatisfied ionic conductivity and low relative density. Herein, a new co-doped method is reported to prepare highly purified polycrystalline powders of MgÀ Mo codoped LSO (Mg/Mo-LSO) electrolytes with high excellent densification properties and improved ionic conductivity. Introducing the Mo 6 + and Mg 2 + ions into the LSO structure can increase the number of interstitial oxide ions and improve the degree of densification at lower sintering temperatures, more importantly, expand the migration channel of oxide ions to enhance the ionic conductivity. As a result, the relative density of the fabricated Mo/Mg-LSO electrolytes pellets could achieve more than 98 % of the theoretical density after sintering at 1500 °C for 4 h with a grain size of about 1-3 μm and the EIS results showed the ionic conductivity increased from 0.782 mS • cm À 1 for the pristine LSO to 33.94 mS • cm À 1 for the doped sample La 9.5 Si 5.45 Mg 0.3 Mo 0.25 O 26 + δ at 800 °C. In addition, the effect of different Mo 6 + doping contents was investigated systematically, in which La 9.5 Si 5.45 Mg 0.3 Mo 0.25 O 26 + δ possessed the highest ionic conductivity and relative density. The proposed Mo/Mg co-doped method in this work is one step forward in developing apatite-structured electrolytes offering excellent potential to address the common issues associated with the fabrication of dense, highly conductive, and thermochemically stable electrolytes for solid oxide electrolysers and fuel cells.

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“…[20][21][22] Ceria is widely used in organic catalytic reactions because of its distinctive ability to transfer more oxygen and the possibility of variation of oxidation state between reduced and oxidized species (Ce 3+ to Ce 4+ ). [23][24][25] Silica (SiO 2 ) is also an extensively studied porous material having outstanding properties like high-temperature stability, larger surface area, and excessive absorption capacity, all of which are important factors for catalysis. [26][27][28] Silica is naturally transparent, and ceria's lattice parameter (0.541 nm) closely resembles that of silica.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of mesoporous SiO₂–CeO₂ hybrid nanostructures with high catalytic activity for transamidation reaction

Sharma

Harikrishnan

Gaur³

et al. 2023

RSC Adv.

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Zirconia- and ceria-based electrolytes for fuel cell applications: critical advancements toward sustainable and clean energy production

Cited by 27 publications

References 163 publications

Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells

Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells

Synthesis and Densification of Mo/Mg Co‐Doped Apatite‐type Lanthanum Silicate Electrolytes with Enhanced Ionic Conductivity

Synthesis of mesoporous SiO₂–CeO₂ hybrid nanostructures with high catalytic activity for transamidation reaction

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Zirconia- and ceria-based electrolytes for fuel cell applications: critical advancements toward sustainable and clean energy production

Cited by 27 publications

References 163 publications

Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells

Fe-Doped SDC Solid Solution as an Electrolyte for Low-to-Intermediate-Temperature Solid Oxide Fuel Cells

Synthesis and Densification of Mo/Mg Co‐Doped Apatite‐type Lanthanum Silicate Electrolytes with Enhanced Ionic Conductivity

Synthesis of mesoporous SiO2–CeO2 hybrid nanostructures with high catalytic activity for transamidation reaction

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Synthesis of mesoporous SiO₂–CeO₂ hybrid nanostructures with high catalytic activity for transamidation reaction