Novel quasi-symmetrical solid oxide electrolysis cells with in-situ exsolved cathode for CO2 electrolysis

Tian, Yunfeng; Zhang, Lingling; Jia, Lichao; Wang, Xin; Yang, Jun; Chi, Bo; Pu, Jian; Li, Jian

doi:10.1016/j.jcou.2019.02.017

Cited by 40 publications

(23 citation statements)

References 38 publications

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“…These results prove that LCaFN crystal structure is relatively stable after the reduction and the in-situ exsolved Fe-Ni nanoparticles would be beneficial for the electrochemical performance. It has been confirmed in our previous work and other research groups [32,33,39].…”

Section: Phase Analysis and Chemical Stabilitysupporting

confidence: 87%

“…The patterns for the sample treated in air can be well-indexed to LaFe0.75Ni0.25O3 (JCPDS 88-0639). After reduced in 5%H2/N2 for 5 h (named R-LCaFN), R-LCaFN still can maintain a stable perovskite structure, which is different to the reduced LSFN [32,33]. While the diffraction peaks shift a little towards the lower angles, indicating the expansion of unit cells.…”

Section: Phase Analysis and Chemical Stabilitymentioning

confidence: 97%

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A novel electrode with multifunction and regeneration for highly efficient and stable symmetrical solid oxide cell

Tian

Liu

Jia

et al. 2020

Journal of Power Sources

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Symmetrical solid oxide cells (SSOCs) have been extensively recognized due to their simple cell configuration, low cost and reliability. High performance electrode is the key determinant of SSOCs. Herein, a multifunctional perovskite oxide La0.6Ca0.4Fe0.8Ni0.2O3-δ (LCaFN) is investigated as electrode for SSOCs. The results confirm that LCaFN shows excellent oxygen reduction reaction (ORR), oxygen evolution reaction (OER), carbon dioxide reduction reaction (CO2-RR) and hydrogen oxidation reaction (HOR) catalytic activity. In SOFC mode, the SSOCs with LCaFN achieve good electrochemical performance with maximum power density of 300 mW cm -2 at 800 °C. For pure CO2 electrolysis in SOEC mode, polarization resistance of 0.055 Ω cm 2 and current density of 1.5 A cm -2 are achieved at 2.0 V at 800 °C. Besides, the cell shows excellent stability both in SOFC mode and SOEC mode.Most importantly, SSOCs with symmetrical LCaFN electrodes show robust and regenerative performance under anodic or cathodic process during the switching gas, showing the great reliability of the SSOCs. The results show that this novel electrode offers a promising strategy for operation of SSOCs.

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Section: Phase Analysis and Chemical Stabilitysupporting

confidence: 87%

Section: Phase Analysis and Chemical Stabilitymentioning

confidence: 97%

A novel electrode with multifunction and regeneration for highly efficient and stable symmetrical solid oxide cell

Tian

Liu

Jia

et al. 2020

Journal of Power Sources

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“…NdBa 0.5 Ca 0.5 Co 1.5 Fe 0.5 O 5 + δ powders were prepared via the conventional sol-gel process [26,32] . Metal nitrates were weighted in stoichiometric proportion and dissolved in deionized water in the beaker, then citric acid (CA) and ethylene glycol (EG) were added in a molar ratio of [Me]: [CA]: [EG] = 1: 1.5: 3.…”

Section: Powders Preparationmentioning

confidence: 99%

High performance and stability of double perovskite-type oxide NdBa0.5Ca0.5Co1.5Fe0.5O5+ as an oxygen electrode for reversible solid oxide electrochemical cell

Tian

Liu

Wang

et al. 2020

Journal of Energy Chemistry

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“…Moreover, reversible SOFC/ SOEC operation modes further deteriorate the air electrode-electrolyte interface [15,16]. Other demerits include the high cost of cobalt-based perovskites and accelerated cobalt volatilization during high-temperature sintering [17,18]. Therefore, the development of cobalt-free air electrodes is expected.…”

Section: Introductionmentioning

confidence: 99%

“…Compared with the cobalt-based perovskite oxide, the nickel-iron-based mixed ion-electron conductor (MIEC) perovskite oxide has better compatibility with YSZ electrolyte TEC and higher ORR catalytic activity [18][19][20]…”

Section: Introductionmentioning

confidence: 99%

Tailored Sr-Co-free perovskite oxide as an air electrode for high-performance reversible solid oxide cells

et al. 2021

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Sr-Co containing perovskite oxides are prospective air electrode candidates for reversible solid oxide cells (RSOCs). However, their efficiencies are limited by Sr segregation and the high thermal expansion coefficient (TEC) of Cobased perovskites. Herein, La 0.6 Ca 0.4 Fe 0.8 Ni 0.2 O 3-δ (LCaFN) is tailored as an Sr-Co-free perovskite air electrode for highperformance RSOCs. Compared with La 0.6 Sr 0.4 Fe 0.8 Ni 0.2 O 3−δ (LSFN) and La 0.6 Sr 0.4 Co 0.2 Fe 0.8 O 3−δ (LSCoF), LCaFN has a high electrical conductivity (297 S cm −1 ), TEC compatibility (11.2 × 10 −6 K −1 ) and improved chemical stability. Moreover, LCaFN has high oxygen reduction reaction (ORR) activity with a low polarization resistance (0.06 Ω cm 2 ) at 800°C. A single-cell Ni-YSZ/YSZ/gadolinium-doped ceria (GDC)/LCaFN-GDC operated at 800°C yields a maximum power density of 1.08 W cm −2 using H 2 as fuel. In the solid oxide electrolysis cell (SOEC) mode, the cell can achieve a current density of approximately 1.2 A cm −2 at 1.3 V with 70% humidity at 800°C. The cell exhibits good reversibility and remains stable in continuous SOEC and solid oxide fuel cell (SOFC) modes. These findings indicate the potential application of La 0.6 Ca 0.4 Fe 0.8 -Ni 0.2 O 3−δ as an air electrode material for RSOCs.

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Novel quasi-symmetrical solid oxide electrolysis cells with in-situ exsolved cathode for CO2 electrolysis

Cited by 40 publications

References 38 publications

A novel electrode with multifunction and regeneration for highly efficient and stable symmetrical solid oxide cell

A novel electrode with multifunction and regeneration for highly efficient and stable symmetrical solid oxide cell

High performance and stability of double perovskite-type oxide NdBa0.5Ca0.5Co1.5Fe0.5O5+ as an oxygen electrode for reversible solid oxide electrochemical cell

Tailored Sr-Co-free perovskite oxide as an air electrode for high-performance reversible solid oxide cells

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