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Fibrous network of highly integrated carbon nanotubes/MoO3 composite bundles anchored with MoO3 nanoplates for superior lithium ion battery anodes
Journal of Industrial and Engineering Chemistry ( IF 6.1 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.jiec.2019.12.017
Se Hwan Oh , Seong Mi Park , Dong-Won Kang , Yun Chan Kang , Jung Sang Cho

Abstract Fibrous network of highly-integrated CNTs/MoO3 composite bundle in which CNTs anchored with MoO3 nanoplates was prepared by electrospinning process and subsequent simple heat-treatment. By performing the pre-acid-treatments of both CNTs and PAN, dipole-dipole interactions and hydrogen bonding between CNTs and PAN could form MoO2(acac)2-PAN-CNTs complex in a solution, which allows for the formation of a stable jet during electrospinning. Notably, by selectively removing PAN in as-spun fibers during heat-treatment, a highly integrated CNTs/MoO3 bundle network anchored with MoO3 nanoplates was obtained. This unique CNTs/MoO3 percolation network makes it possible to achieve a superior lithium ion storage performance by improving electrical conductivity and structure stability. Thus, the unique nanostructure has high discharge capacities of 972 mA h g−1 after 100 cycles at 1.0 A g−1 and 905 mA h g−1 after 800 long-term cycles at 2.0 A g−1, when applied as anode materials for lithium-ion batteries. The discharge capacities of 980, 920, 819, 742, 599, 484, and 374 mA h g−1 were observed at current densities of 0.5, 1.0, 2.0, 3.0, 5.0, 7.0, and 10.0 A g−1, respectively.

中文翻译:

高度集成的碳纳米管/MoO3 复合束的纤维网络与 MoO3 纳米板锚定,用于优异的锂离子电池阳极

摘要 通过静电纺丝工艺和随后的简单热处理制备了高度集成的CNTs/MoO3 复合束的纤维网络,其中CNTs 锚定在MoO3 纳米片上。通过对 CNTs 和 PAN 进行预处理,CNTs 和 PAN 之间的偶极-偶极相互作用和氢键可以在溶液中形成 MoO2(acac)2-PAN-CNTs 复合物,从而形成稳定的射流在静电纺丝过程中。值得注意的是,通过在热处理过程中选择性去除初纺纤维中的 PAN,获得了高度集成的 CNTs/MoO3 束网络,该网络与 MoO3 纳米片相连。这种独特的 CNTs/MoO3 渗透网络可以通过提高导电性和结构稳定性来实现卓越的锂离子存储性能。因此,当用作锂离子负极材料时,独特的纳米结构在 1.0 A g-1 下 100 次循环后具有 972 mA hg-1 的高放电容量,在 2.0 A g-1 下长期循环 800 次后具有 905 mA hg-1 的高放电容量电池。分别在 0.5、1.0、2.0、3.0、5.0、7.0 和 10.0 A g-1 的电流密度下观察到 980、920、819、742、599、484 和 374 mAh g-1 的放电容量。
更新日期:2020-03-01
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