Investigation the role of α-MnO۲/graphene q-dot as a novel cathode material for Li-O۲ batteries

سال انتشار: 1400
محل انتشار: اولین همایش ملی باتری لیتیومی
کد COI اختصاصی: LBC01_007
زبان مقاله: انگلیسی
تعداد مشاهده: 121

نویسندگان

Department of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box۱۶۷۶۵-۳۴۵۴, Tehran, Iran

Alireza Madram

Department of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box۱۶۷۶۵-۳۴۵۴, Tehran, Iran

Ghasem Oskueyan

Department of Chemistry and Chemical Engineering, Malek Ashtar University of Technology, P.O. Box۱۶۷۶۵-۳۴۵۴, Tehran, Iran

Ali Sadeghi

Research Laboratory of Real Samples Analysis, Faculty of Chemistry, Iran University of Science andTechnology, Tehran ۱۶۸۴۶۱۳۱۱۴, Iran

چکیده

By increasing the demand for more efficient energy storage systems, especially with the development of electric transportation industry, new generation batteries have come into operation. Meanwhile, lithium-air batteries are considered as attractive candidates for the next generation of lithium batteries due to their high energy density (> ۱۱۰۰۰ Wh.kg-۱) which is comparable to gasoline (۱۳۰۰۰ Wh.kg-۱). On the other hand, these batteries face with some challenges such as formation of lithium peroxide (Li۲O۲) and lithium oxide (Li۲O) which can limit the transfer of electrons. Thus, utilization of metal catalysts is the best way to ameliorate the reversibility of these batteries. Inspired by this concept, the method of manufacturing and preparation of manganese dioxide catalyst with graphene quantum dot is introduced. In conclusion, based on different charge/discharge processes, at a current density of ۱۰۰ mA/g, ۱۲۰۰۰ mAh/g obtained for α-MnO۲. Furthermore, with increasing the current density up to ۲۰۰ mA/g, ۳۴۰۰ mAh/g and ۱۱۲۵۰ mAh/g obtained for α-MnO۲ and α-MnO۲/graphene quantum dot, respectively. Moreover, EIS result depicted that this structure can provide sufficient channels for Li insertion/extraction processes. Eventually, IR, FESEM, and XRD results demonstrated uniform structure of electrode material.

کلیدواژه ها

Li-O۲ battery, Metal oxide catalyst, Li-O۲, α-MnO۲, graphene quantum dot

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