| Carbon nanotubes (CNTs) employed as the cathode material in lithium-oxygen batteries |
| کد مقاله : 1000-CNF |
| نویسندگان |
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سیدرضا موسوی نژاد، زهرا شریعتی نیا *، معصومه صالحی Department of Chemistry, Amirkabir University of Technology (Tehran Polytechnic), P.O.Box:15875-4413, Tehran, Iran. |
| چکیده مقاله |
| Lithium-air batteries have the highest energy storage capacity among other batteries and semi-fuel cells [1]. However, one should overcome many challenges including high over-voltage, low cycleability, and electrolyte instability in order to be able to present such batteries for application [2]. The cathode is of critical importance in lithium-air batteries since the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) occur at the cathode but their low reaction kinetics results in over-voltage and inappropriate cycleability [3]. The CNTs were characterized using SEM, XRD, and BET analysis methods and used as cathode material in the lithium-oxygen batteries. The specific surface area measured from Brunauer–Emmett–Teller (BET) isotherms and the average pore volume of CNTs were 103 m2/g and 0.21 cm3/g, respectively. The energy storage capacity of the Li-O2 battery fabricated using pristine CNT is about 4100 mA.h/gelectrode at 100 mA/gelectrode current density. The charge and discharge over-voltages were 1.44 and 0.32 V, respectively, at the 100 mA/gelectrode current density. It was noticeable that the heat treatment reduced the resistance in cathodes by 35%. The results reflected that heat treatment improved the cathode battery performance. Thus, the cathode sample was fabricated using the heat treatment process. The round-trip efficiency of assembled battery using CNTs was 61%. |
| کلیدواژه ها |
| Lithium-oxygen battery, Carbon nanotubes (CNTs), Round-trip efficiency, Cathode material, Heat treatment |
| وضعیت: چکیده برای ارائه به صورت پوستر پذیرفته شده است |