共价有机骨架衍生的氮掺杂碳/碳纳米管杂化结构的储锂性能

doi:10.12066/j.issn.1007-2861.2111

摘要/Abstract

摘要：

通过常温法设计并合成了钴金属修饰的共价有机骨架 (covalent organicframework, COF) 结构, 然后以此为前驱体,通过修饰的钴金属中心在一步煅烧过程中原位催生碳纳米管 (carbonnanotube, CNT), 从而获得氮掺杂碳/碳纳米管杂化复合材料.氮的掺杂进一步增加了该复合材料的储锂活性位点,并有效提高了材料的电子和离子的电导率. 在作为锂离子电池负极材料时,该氮掺杂的碳/碳纳米管杂化复合材料展现了较高的比容量和较好的循环稳定性,在经过 300 圈的充放电循环后, 其比容量保持在 652 mA·h·g^-1.

关键词: 共价有机骨架, 碳纳米管, 锂离子电池, 负极材料, 复合材料

Abstract:

The covalent organic framework, obtained by the facile room-temperature method, was selected as the precursor for fabricating the nitrogen-doped carbon/carbon nanotube composite (N-C-CNT), in with the nitrogen-doped carbon was derived directly from the covalent organic framework, while the carbon nanotubes were formed in situ from acetylene under catalysis by metallic cobalt. Due to N-doping, the carbon layer provides more active sites for lithium storage; therefore, the N-C-CNT composite exhibits high specific capacity and excellent cycle stability (reversible capacity of 652 mA·h·g^-1 after300 cycles) as an anode material for lithium ion batteries.

Key words: covalent organic framework (COF), carbon nanotube, lithium-ion battery, anode materials, composite

中图分类号:

TM912

汤旭旭, 杨秦斯, 杨建伟, 孙炜伟. 共价有机骨架衍生的氮掺杂碳/碳纳米管杂化结构的储锂性能[J]. 上海大学学报(自然科学版), 2020, 26(6): 972-979.

TANG Xuxu, YANG Qingsi, YANG Jianwei, SUN Weiwei. Composite of covalent organic framework-derived nitrogen-doped carbon with carbon nanotubes for lithium-storage[J]. Journal of Shanghai University（Natural Science Edition）, 2020, 26(6): 972-979.

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