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Volume 13
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Article

Developing CeO2-CoAl2O4 Semiconductor Ionic Based Heterostructure Composite Electrolyte for Low-Temperature Solid Oxide Fuel Cells (SOFCs)

by
Yiwang Dong
1,
Muhammad Yousaf
2,
Muhammad Ali Kamran Yousaf Shah
2,
Muhammad Akbar
3,
Yuzheng Lu
4,
Lei Zhang
4,
Qadeer Akbar Sial
5,
Peng Cao
1 and
Changhong Deng
1,*
1
School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China
2
Energy Storage Joint Research Center, School of Energy and Environment, Southeast University, No. 2 Si Pai Lou, Nanjing 210096, China
3
Key Laboratory of Ferro and Piezoelectric Materials and Devices of Hubei Province, Faculty of Physics and Electronic Science, Hubei University, Wuhan 430062, China
4
School of Electronic Engineering, Nanjing Xiaozhuang University, Nanjing 211171, China
5
Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
*
Author to whom correspondence should be addressed.
Crystals 2023, 13(6), 975; https://doi.org/10.3390/cryst13060975
Submission received: 7 December 2022 / Revised: 27 February 2023 / Accepted: 1 March 2023 / Published: 19 June 2023
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Abstract

Semiconductor ionic electrolytes, especially heterostructure composites, have a significant role in enhancing oxide ion conductivity and peak power density (PPD) because of their interfacial contact. In this work, the fluorite structure CeO2 and spinel-based CoAl2O4 samples, as a heterostructure composite electrolyte, are successfully fabricated. The p-type CoAl2O4 and n-type CeO2 heterostructure (CeO2-CoAl2O4) used as an electrolyte exhibits a cell performance of 758 mW/cm2 under fuel cell H2/air conditions at 550 °C, which is quite higher than the pure CoAl2O4 and CeO2 fuel cell devices. Scanning electron microscopy (SEM) and high-resolution transmission electron microscopy (HR-TEM) verified the heterostructure formation including the morphological analysis of the prepared heterostructure composite. The heterostructure-based CeO2-CoAl2O4 composite achieved a higher ionic conductivity of 0.13 S/cm at 550 °C temperature, which means that the constructed device successfully works as an electrolyte by suppressing electronic conductivity. Meanwhile, the obtained results demonstrate the semiconductor ionic heterostructure effect by adjusting the appropriate composition to build heterostructure of the n-type (CeO2) and p-type (CoAl2O4) components and built-in electric field. So, this work exhibits that the constructed device can be effective for energy conversion and storage devices.
Keywords: semiconductor ionics; heterostructure; p-n junction; spinel; SOFCs semiconductor ionics; heterostructure; p-n junction; spinel; SOFCs

Share and Cite

MDPI and ACS Style

Dong, Y.; Yousaf, M.; Shah, M.A.K.Y.; Akbar, M.; Lu, Y.; Zhang, L.; Sial, Q.A.; Cao, P.; Deng, C. Developing CeO2-CoAl2O4 Semiconductor Ionic Based Heterostructure Composite Electrolyte for Low-Temperature Solid Oxide Fuel Cells (SOFCs). Crystals 2023, 13, 975. https://doi.org/10.3390/cryst13060975

AMA Style

Dong Y, Yousaf M, Shah MAKY, Akbar M, Lu Y, Zhang L, Sial QA, Cao P, Deng C. Developing CeO2-CoAl2O4 Semiconductor Ionic Based Heterostructure Composite Electrolyte for Low-Temperature Solid Oxide Fuel Cells (SOFCs). Crystals. 2023; 13(6):975. https://doi.org/10.3390/cryst13060975

Chicago/Turabian Style

Dong, Yiwang, Muhammad Yousaf, Muhammad Ali Kamran Yousaf Shah, Muhammad Akbar, Yuzheng Lu, Lei Zhang, Qadeer Akbar Sial, Peng Cao, and Changhong Deng. 2023. "Developing CeO2-CoAl2O4 Semiconductor Ionic Based Heterostructure Composite Electrolyte for Low-Temperature Solid Oxide Fuel Cells (SOFCs)" Crystals 13, no. 6: 975. https://doi.org/10.3390/cryst13060975

APA Style

Dong, Y., Yousaf, M., Shah, M. A. K. Y., Akbar, M., Lu, Y., Zhang, L., Sial, Q. A., Cao, P., & Deng, C. (2023). Developing CeO2-CoAl2O4 Semiconductor Ionic Based Heterostructure Composite Electrolyte for Low-Temperature Solid Oxide Fuel Cells (SOFCs). Crystals, 13(6), 975. https://doi.org/10.3390/cryst13060975

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