Space-Confined Synthesis of Three-Dimensional Boron/Nitrogen-Doped Carbon Nanotubes/Carbon Nanosheets Line-in-Wall Hybrids and Their Electrochemical Energy Storage Applications

Shan Zhu, Jiajun Li, Qingfeng Li, Chunnian He, Enzuo Liu, Fang He, Chunsheng Shi, Naiqin Zhao

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This research demonstrates a flexible one-pot strategy for fabricating three-dimensional (3D) boron/nitrogen-doped networks of carbon nanotubes(CNTs)/carbon nanosheets "Line-in-Wall" hybrids (LIWNB) based on the space-confined template method. In the synthesis, the high rate of freezing step and freeze-dried process enable the CNTs and carbon-heteroatoms sources confined in the limited space of the self-assembled NaCl salts, which are then heat-treated to obtain a B/N-doped network constructed by "Line-in-Wall" type of carbon hybrids. By combining the 3D B/N-doped carbon nanosheets network and CNTs in this unique pattern, the LIW-NB integrates advantages of three aspects: first, the doped heteroatoms enhancing electrochemical properties of carbon matrix; second, the warp-proof nanosheets supplying high specific surface area; and the extracted and embedded CNTs serving as electron conductive paths and reinforcing the whole architecture. As a result, the 3D LIW-NB shows excellent electrochemical properties: as the electrode of supercapacitors, LIW-NB exhibits high specific capacity at different current densities (389 F g-1 at 1 A g-1 and 129 F g-1 at 20 Ag-1); as the lithium ion battery anode, it possesses high reversible storage capacity (1165 mAh g-1 at 0.1 Ag-1) and stable long cycle performance at high rate (1000 cycles at 2 A g-1).
Original languageEnglish
JournalElectrochimica Acta
Volume212
Pages (from-to)621-629
Number of pages9
ISSN0013-4686
DOIs
Publication statusPublished - 2016

Keywords

  • Carbon hybrids
  • Line-in-wall
  • Lithium ion battery
  • Supercapacitor

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