High capacity Na-O₂ batteries with carbon nanotube paper as binder-free air cathode

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• 作者：Zelang Jian ; Yong Chen ; Fujun Li ; Tao Zhang ; Chang Liu ; Haoshen Zhou
• 关键词：Na&ndash ; O2 battery ; Carbon nanotube paper ; Binder-free ; Cathode
• 刊名：Journal of Power Sources
• 出版年：1 April, 2014
• 年：2014
• 卷：251
• 期：Complete
• 页码：466-469
• 全文大小：1035 K

文摘

A carbon nanotube paper without any binders and additives was directly used as the catalyst for Na-O₂ batteries. Corresponding electrochemical performances were investigated. A large discharge capacity can be high up to 7530聽mAh聽g^鈭?, which, to the best of our knowledge, is the highest value obtained at the similar current density. The cycling performance of the Na-O₂ battery can be improved with a capacity limit of 1000聽mAh聽g^鈭?. Moreover, the overpotential gap was as small as 200聽mV. Na₂O₂路2H₂O is identified by X-ray diffraction (XRD) as the main crystalline discharge product and can be decomposed in the following charging process as revealed by scanning electron microscope (SEM). These results indicate that the CNT paper is a promising cathode for Na-O₂ battery.