Cubic silicon carbide/zinc oxide heterostructure fuel cells
| Autor: | Muhammad Asghar, Muhammad Naveed Rasheed, Jun Wang, Sining Yun, Bin Zhu, Ammara Maryam, Yueming Xing, Faze Wang, Chen Xia, Naveed Muhammad, Baoyuan Wang, Enyi Hu |
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| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Physics and Astronomy (miscellaneous) Open-circuit voltage business.industry Ionic bonding Heterojunction 02 engineering and technology Electrolyte 021001 nanoscience & nanotechnology 01 natural sciences Semiconductor 0103 physical sciences Ionic conductivity Optoelectronics 0210 nano-technology Electronic band structure business Current density |
| Zdroj: | Applied Physics Letters. 117:162105 |
| ISSN: | 1077-3118 0003-6951 |
| DOI: | 10.1063/5.0021460 |
| Popis: | Multifunctional semiconductor cubic silicon carbide (3C-SiC) is employed for fuel cell electrolyte, which has never been used before. n-type 3C-SiC can be individually employed as the electrolyte in fuel cells, but delivers insufficient open circuit voltage and minuscule current density due to its electronic dominant property. By introducing n-type ZnO to form an n–n 3C-SiC/ZnO heterostructure, significant enhancements in the ionic conductivity of 0.12 S/cm and fuel cell performance of 270 mW cm−2 are achieved at 550 °C. It is found that the energy band bending and build-in electric field of the heterostructure play the pivotal role in the ionic transport and suppressing the electronic conduction of 3C-SiC, leading to a markable material ionic property and fuel cell performance. These findings suggest that 3C-SiC can be tuned to ionic conducting electrolyte for fuel cell applications through the heterostructure approach and energy band alignment methodology. |
| Databáze: | OpenAIRE |
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