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

作者：Zhu, Shan; Li, Jiajun; Li, Qingfeng; He, Chunnian; Liu, Enzuo; He, Fang; Shi, Chunsheng; Zhao, Naiqin^*

来源：Electrochimica Acta, 2016, 212: 621-629.

DOI：10.1016/j.electacta.2016.07.065

• Space-confined effect
• Carbon hybrids
• Line-in-wall
• Lithium ion battery
• Supercapacitor

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)).

• 出版日期2016-9-10
• 单位天津大学