| Fe/Co-based metal-organic framework as electrocatalysts for lithium-oxygen batteries |
| کد مقاله : 1010-CNF |
| نویسندگان |
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زکیه پژند *، سیدمحمد سیدباقری، رضا صباغی، محمد محمدی تقی آبادی، حسین غریبی شیمی فیزیک،دانشگاه تربیت مدرس |
| چکیده مقاله |
| Power sources and efficient energy storage devices with high energy density are highly desired to power a future sustainable community. Rechargeable lithium-oxygen batteries are promising candidates for next-generation power sources. In this work, a metal-organic–framework with three metals, Zinc, Iron, and Cobalt (Fe/Co-ZIF-8), was synthesized. The structure of the Fe/Co-Zif-8 was characterized by Field Emission Scanning Electron Microscope (FESEM) and X-ray diffraction (XRD). Furthermore, the Iron/ Cobalt nanocarbon (Fe/Co-NC-1000) electrocatalyst for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) was obtained by high-temperature pyrolysis of Fe/Co-ZIF-8. The synthesized Fe/Co-NC-1000 exhibits high bifunctional oxygen catalytic activities in terms of a low overpotential (310 mV @ -1 mA cm-2) for ORR and low overpotential (321 mV @ 10 mA cm-2) for OER. As a proof of concept, newly designed non-aqueous Li-O2 batteries fabricated with Fe/Co-NC-1000 as oxygen electrodes obtained high round-trip efficiency (~ 77%), low overpotential (0.76 V) and Furthermore, the electrode kinetics after each cycle of charge-discharge were also compared by electrochemical impedance spectroscopy (EIS) in the frequency range from 100 kHz to 10 mHz to analyze the charge transfer resistance in the Li-O2 batteries. The results showed that hierarchical FeCo-NC-1000 architectures are promising cathode catalysts for Li-O2 batteries. |
| کلیدواژه ها |
| Metal-organic framework (MOF), Lithium-oxygen battery, Oxygen reduction reaction (ORR), Oxygen evolution reaction (OER) |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |