The composite rods of MnO and multi-walled carbon nanotubes as anode materials for lithium ion batteries

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• 作者：Xiaofei Sun ; Youlong Xu ; Peng Ding ; Mingrui Jia ; Gerbr ; Ceder
• 关键词：Manganese oxide ; Carbon nanotube ; Composite ; Anode ; Lithium ion battery
• 刊名：Journal of Power Sources
• 出版年：2013
• 出版时间：15 December, 2013
• 年：2013
• 卷：244
• 期：Complete
• 页码：690-694
• 全文大小：1570 K

文摘

The composite of manganese monoxide and multi-walled carbon nanotubes (MnO/MWNTs) is prepared hydrothermally by MWNTs and KMnO₄ followed with a sintering process. After reducing KMnO₄ as the reductant, the leftover MWNTs are found randomly distributed in the final MnO rods forming a conducting network. More importantly, they can buffer the volume change of MnO during lithium incorporation/extraction. As a result, the rate capability and cycling performance of MnO as an anode material for lithium ion batteries are significantly improved. The MnO/MWNTs composite shows a reversible capacity as high as 770.6?mA?h?g^?1 and 455.3?mA?h?g^?1 at the current density of 7.21?mA?g^?1 and 310.23?mA?g^?1 respectively between 0.01 and 3.5?V (vs. Li/Li⁺ hereafter). Furthermore, the capacity retention is over 92.4 % after 200 cycles at 216.14?mA?g^?1 between 0.01 and 3.0?V.