In-Situ Formation of Sandwiched Structures of Nanotube/CuxOy/Cu Composites for Lithium Battery Applications

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• 作者：Subramanian Venkatachalam ; Hongwei Zhu ; Charan Masarapu ; KaiHsuan Hung ; Z. Liu ; K. Suenaga ; Bingqing Wei
• 刊名：ACS Nano
• 出版年：2009
• 出版时间：August 25, 2009
• 年：2009
• 卷：3
• 期：8
• 页码：2177-2184
• 全文大小：553K
• 年卷期：0
• ISSN：1936-086X

文摘

Development of materials and structures leading to lithium ion batteries with high energy and power density is a major requirement for catering to the power needs of present day electronic industry. Here, we report an in situ formation of a sandwiched structure involving single-walled carbon nanotube film, copper oxide, and copper during the direct synthesis of nanotube macrofilms over copper foils and their electrochemical performance in lithium ion batteries. The sandwiched structure showed a remarkably high reversible capacity of 220 mAh/g at a high cycling current of 18.6 A/g (50 C), leading to a significantly improved electrochemical performance which is extremely high compared to pure carbon nanotube and any other carbon based materials.