Zhao Tingkai, Liu Yongning, Li Tiehu, Zhao Xiang
School of Materials Science, Northwestern Polytechnical University, Xi'an 710072, China.
J Nanosci Nanotechnol. 2010 Jun;10(6):3873-7. doi: 10.1166/jnn.2010.1981.
Amorphous carbon nanotubes (ACNTs) showed the different structure with crystal carbon nanotubes, such as single-walled and multi-walled carbon nanotubes due to their unique tube walls. The tube wall of ACNTs is comprised of many single layer graphene sheets which present long-distance disorder and short-distance order. Herein, we mainly studied the electrochemical property of ACNTs as anode materials for lithium ion secondary batteries and the mechanism of intercalation lithium. The electrochemical performances of as-grown and oxidized ACNTs were tested by two-electrode cell. The results indicate that the reversible capacity of ACNTs oxidized at 300 degrees C reaches 530 mAh/g and after the first 5 cycles the capacity remains 93%. The intercalation Li of ACNT include the inner wall and the side wall between graphene sheets. ACNTs offer a new exciting alternative to the traditional materials used for fabrication of lithium ion secondary batteries.
非晶态碳纳米管（ACNTs）由于其独特的管壁结构，与晶体碳纳米管（如单壁和多壁碳纳米管）呈现出不同的结构。ACNTs的管壁由许多单层石墨烯片组成，这些石墨烯片呈现出长程无序和短程有序的状态。在此，我们主要研究了ACNTs作为锂离子二次电池负极材料的电化学性能以及锂嵌入的机制。通过两电极电池测试了生长态和氧化态ACNTs的电化学性能。结果表明，在300℃下氧化的ACNTs的可逆容量达到530 mAh/g，在前5个循环后容量保持在93%。ACNTs的锂嵌入包括石墨烯片之间的内壁和侧壁。ACNTs为用于制造锂离子二次电池的传统材料提供了一种令人兴奋的新替代品。
