Demonstration of high-performance and stable metal-supporting semiconductor-ionic fuel cells

Zhao, Huibin; Lin, Wanbin; Yuan, Kang; Singh, Manish; Chiu, Te-Wei; Fan, Liangdong

doi:10.1016/j.jpowsour.2023.233325

Cited by 9 publications

(2 citation statements)

References 65 publications

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“…Moreover, not only high performance, but also good stability are the main characteristics of SMFC. 21 As shown in Fig. 4f, when the same mass of 20% sodium carbonate coated LCP (ABL) is added to the anode and assembled with 8LCP-2NCO, the voltage decay rate was 5.63×10 -4 V h −1 in 80 h when the current density is 100 mA cm −2 at 520 °C.…”

Section: Resultsmentioning

confidence: 91%

Na_0.6Co₃O₄- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Sun,

Yang,

Afzal

et al. 2024

J. Electrochem. Soc.

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Functional Sodium-doped cobalt oxide (Na0.6Co3O4, NCO) was incorporated to regulate and improve the electrochemical performance of La/Pr co-doped ceria (LCP) electrolytic materials with good operative stability, forming an p-n heterostructure electrolyte (LCP-NCO) for low-temperature solid oxide fuel cell (LTSOFC) application. LCP-NCO is a new potential semiconductor-ionic material, achieving a maximum power density of 1075 mW cm-2 along with a high open-circuit voltage of 1.061 V at 520℃. Scanning electron microscopy combined with transmission electron microscopy unveiled the crystallographic microstructure of heterostructure interface between LCP and NCO. Raman spectra and Fourier transform infrared spectroscopy spectra were analyzed to distinguish the functional groups and the vibrational properties. Ultraviolet–visible absorption and ultraviolet photoelectron spectroscopy have determined the accurate band edge positions of LCP and NCO and p-n heterojunction nature. Built-in electric field in semiconductor heterostructure and more oxygen vacancies created through the variation of Co3+/Co2+ ratio in LCP-NCO during the fuel cell test, contributed to the enhanced ionic transport. Characteristic of competent conductivity of 0.26-0.42 S cm-1 at 400-520℃, and the improved cell duration, revealed that the LCP-NCO as a hybrid oxygen ion and protonic conductor would be a potential electrolyte for LTSOFC.

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Section: Resultsmentioning

confidence: 91%

Na_0.6Co₃O₄- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Sun,

Yang,

Afzal

et al. 2024

J. Electrochem. Soc.

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“…Perovskite semiconductors have also shown promise as electrolytes for low-temperature CFCs, such as the SrFe 0.2 Ti 0.8 O 3 –ZnO heterostructure demonstrated by Shah et al . Using semiconductor-based materials in ceramic fuel cells offers significant advantages, including enhanced ionic conducting properties and a built-in electric field (BIEF) that prevents electronic short-circuiting and promotes ion transportation. − Among these materials, BaTiO 3 , a widely studied perovskite, possesses high dielectric constant and ferroelectric properties, making it suitable for various electronic and electro-optical applications. − Using high dielectric materials with large polarizability to develop oxide-ion electrolytes has also emerged. , An exciting strategy was needed to advance CFCs, and this study presents an approach using a BaTiO 3 (BTO) coating, incorporating the wide band gap ion-conducting semiconductor material CeO 2 as a promising electrolyte layer for CFCs. The authors also investigated the surface and interfacial properties of the BTO–CeO 2 interfaces to enhance ionic conductivity and realize a successful fuel cell operation.…”

Section: Introductionmentioning

confidence: 99%

Space Charge Polarization Effect in Surface-Coated BaTiO₃ Electrolyte for Low-Temperature Ceramic Fuel Cell

Akbar,

Paydar,

Shah

et al. 2024

ACS Appl. Energy Mater.

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The significant enhancement of ionic conduction in semiconductors as potential electrolytes for low-temperature ceramic fuel cells (LT-CFCs) has recently gained strong attention. This study introduces a surface coating of CeO 2 on the dielectric perovskite material BaTiO 3 (BTO) to function as an electrolyte for LT-CFC applications. The 10% CeO 2 coated on BTO (BTO-10CeO 2 ) exhibited an open-circuit voltage (OCV) of 1.05 V and a power density of 609 mW cm −2 at 550 °C. Integrating BTO and CeO 2 at the interfaces and the induced built-in electric field (BIEF) establishes a rapid ion-conducting pathway, thereby facilitating the BTO−10CeO 2 composite to exhibit a high ionic conductivity of 0.18 S cm −1 . At an applied frequency of 20 kHz, the maximum dielectric constant of BTO−10CeO 2 was approximately 5800 at 550 °C, and the maximum temperature (T m ) showed a reversible proportionality to the applied frequency in an air environment. The consistently high ionic conductivity (σ o ) of BTO− 10CeO 2 across various applied frequencies underscores the role of dielectricity and polarization in accelerating ion transport. This observation provides crucial insights into how dielectric properties and polarization effects impact ionic transport, laying the foundation for further optimization and advancement in ceramic fuel cell technology.

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Superionic conduction of self-assembled heterostructural LSCrF-CeO2 electrolyte for solid oxide fuel cell at 375–550 °C

Meng,

Akbar,

Gao

et al. 2024

Applied Surface Science

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Demonstration of high-performance and stable metal-supporting semiconductor-ionic fuel cells

Cited by 9 publications

References 65 publications

Na_0.6Co₃O₄- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Na_0.6Co₃O₄- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Space Charge Polarization Effect in Surface-Coated BaTiO₃ Electrolyte for Low-Temperature Ceramic Fuel Cell

Superionic conduction of self-assembled heterostructural LSCrF-CeO2 electrolyte for solid oxide fuel cell at 375–550 °C

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Demonstration of high-performance and stable metal-supporting semiconductor-ionic fuel cells

Cited by 9 publications

References 65 publications

Na0.6Co3O4- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Na0.6Co3O4- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Space Charge Polarization Effect in Surface-Coated BaTiO3 Electrolyte for Low-Temperature Ceramic Fuel Cell

Superionic conduction of self-assembled heterostructural LSCrF-CeO2 electrolyte for solid oxide fuel cell at 375–550 °C

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Na_0.6Co₃O₄- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Na_0.6Co₃O₄- La/Pr co-Doped Ceria as Semiconductor-Ionic Heterostructure Material for Fuel Cell Application

Space Charge Polarization Effect in Surface-Coated BaTiO₃ Electrolyte for Low-Temperature Ceramic Fuel Cell