Sandwich-like CNTs/Si/C nanotubes as high performance anode materials for lithium-ion batteries

Ruiping Liu, Chao Shen, Yue Dong, Jinlei Qin, Qi Wang, James Iocozzia, Shiqiang Zhao, Kunjie Yuan, Cuiping Han, Baohua Li, Zhiqun Lin

Research output: Contribution to journalArticlepeer-review

104 Scopus citations

Abstract

Co-axial silicon-coated carbon nanotubes (CNTs/Si) were successfully synthesized via a hydrothermal method. Sandwich-like carbon-coated CNTs/Si were obtained by an additional carbon coating. The as-prepared materials show superior cycling performance as anode materials in lithium ion batteries with a current density as high as 500 mA g-1 with no observable structural changes during the charge/discharge process. In addition, stable reversible discharge capacities as high as 1508.5 mA h g-1 after 1000 cycles were obtained. At higher current densities of 1 A g-1 and 2 A g-1, the CNTs/Si/C nanotubes also showed ideal cycling performance with reversible discharge capacities of 1216.6 mA h g-1 and 932.2 mA h g-1, respectively. The sandwich-like hollow tube structure of CNTs/Si/C not only alleviates the volume change during cycling, but also facilitates Li-ion and electron transport, and stabilizes the SEI layer. These results suggest that sandwich-like CNTs/Si/C nanotubes are a promising anode material for lithium ion batteries.

Original languageEnglish
Pages (from-to)14797-14804
Number of pages8
JournalJournal of Materials Chemistry A
Volume6
Issue number30
DOIs
StatePublished - 2018

Bibliographical note

Funding Information:
The authors acknowledge the nancial support from the National Natural Science Foundation of China (NSFC-No. 51202117), the Natural Science Foundation of Beijing (No. 2162037), the Beijing Nova program (Z171100001117077), the Beijing outstanding talent program (No. 2015000020124G121), the Fundamental Research Funds for the Central Universities (No. 2014QJ02), the State Key Laboratory of Coal Resources and Safe Mining (No. SKLCRSM16KFB04), the Key Laboratory of Advanced Materials of Ministry of Education (No. 2018AML03), the Yue Qi Young Scholar Project of China University of Mining & Technology (Beijing) (No. 2017QN17), and the Pengcheng Scholar Program of Shenzhen.

Publisher Copyright:
© The Royal Society of Chemistry.

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