Bamboo-like carbon nanotube-carbon nanotube for high-performance sodium-ion batteries

•Bamboo-like carbon nanotube-in-carbon nanotube.•Simple hollow structure, very large specific surface area.•High specific capacity, stable cycling performance for sodium ion storage. A large non-graphitic carbon nanotube (CNT) is grown on another small crystal CNT through in-situ growth of zeolitic...

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Bibliographic Details
Published in:Materials letters 2022-03, Vol.311, p.131587, Article 131587
Main Authors: Tong, Z.W., Yuan, Y.F., Yin, S.M., Wang, B.X., Guo, S.Y., Mo, C.L.
Format: Article
Language:English
Subjects:
Anodes
Bamboo
Carbon
Carbon nanotubes
Crystal defects
Crystal growth
Electrode materials
Energy storage and conversion
Materials science
Metal-organic frameworks
Microstructure
Sodium
Sodium ion batteries
Specific surface
Surface area
Tannic acid
Zeolites
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Summary:•Bamboo-like carbon nanotube-in-carbon nanotube.•Simple hollow structure, very large specific surface area.•High specific capacity, stable cycling performance for sodium ion storage. A large non-graphitic carbon nanotube (CNT) is grown on another small crystal CNT through in-situ growth of zeolitic imidazolate framework-8 on CNT, etching of tannic acid and final carbonization. The composite has unique bamboo structure and large specific surface area (476.4 m2 g−1). As anode material of sodium ion batteries, bamboo-like CNT-CNT carbonized at 600 °C has the higher specific capacity (177.9 mAh g−1 at 1 A g−1) and the more stable cycling performance during 2000 cycles than those carbonized at 800 °C, 1000 °C and pure CNTs. This is due to the plentiful defects, very large specific surface area and hollow nanotube-in-nanotube structure that significantly promote transport and storage of Na+.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2021.131587