Chen Zhi, Wang Taihong, Zhang Ming, Cao Guozhong
Key Laboratory for Micro-Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha, 410082, China.
Department of Materials Science & Engineering, University of Washington, Seattle, WA, 98195, USA.
Small. 2017 Jun;13(22). doi: 10.1002/smll.201604045. Epub 2017 Mar 20.
Porous carbon nanotubes (CNTs) are obtained by removing MoO nanoparticles from MoO @C core@shell nanofibers which are synthesized by phase-segregation via a single-needle electrospinning method. The specific surface area of porous CNTs is 502.9 m g , and many oxygen-containing functional groups (COH, CO) are present. As anodes for sodium-ion batteries, the porous CNT electrode displays excellent rate performance and cycling stability (110 mA h g after 1200 cycles at 5 A g ). Those high properties can be attributed to the porous structure and surface modification to steadily store Na with high capacity. The work provides a facile and broadly applicable way to fabricate the porous CNTs and their composites for batteries, catalysts, and fuel cells.
多孔碳纳米管（CNTs）是通过从MoO@C核壳纳米纤维中去除MoO纳米颗粒而获得的，MoO@C核壳纳米纤维是通过单针静电纺丝法通过相分离合成的。多孔碳纳米管的比表面积为502.9 m²/g，并且存在许多含氧官能团（C—OH、C=O）。作为钠离子电池的阳极，多孔碳纳米管电极表现出优异的倍率性能和循环稳定性（在5 A/g下循环1200次后为110 mA h/g）。这些优异性能可归因于其多孔结构和表面改性，从而能够稳定地高容量存储钠。这项工作为制备用于电池、催化剂和燃料电池的多孔碳纳米管及其复合材料提供了一种简便且广泛适用的方法。
