Constructing two-dimensional (2D) carbon nanosheets into a three-dimensional (3D) framework can prevent restacking and increase the accessible surface area, which is promising to broaden the range of applications of 2D carbon materials. Here we report a facile preparation of an ultrathin, highly graphitized carbon nanosheets framework (UGCF) by directly carbonizing a gel composite of resol, FeCl3·6H2O, and F127 block polymer prepared by ball milling. During the carbonization process, the presence of FeCl3·6H2O in the resol-F127-Fe composite benefits the formation of highly graphitized structure, while F127 helps to introduce the porous architecture, resulting in an interconnected framework of carbon nanosheets. The unique carbon nanostructure of this UGCF has major advantages for electrochemical applications, owing to the large accessible geometrical surface, the rapid diffusion paths for ions, and the continuous transfer path for electrons through the graphitic framework. When used as anode in lithium-ion batteries, the UGCF shows excellent electrochemical performance in terms of capacity, rate performance, and cycle stability. This work provides a convenient and simple scale-up method to prepare highly graphitized carbon nanosheets with 3D nanoarchitecture.
Bibliographical noteFunding Information:
This work was partially supported by the Australian Research Council (ARC) Future Fellow (Grant FT150100479 ), the Postdoctoral Fellowship of the Japan Society fort the Promotion of Science (18F18038, 18F18764), and the Natural Science Foundation of Jiangsu Province ( BK20170778 ). This work was performed in part at the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and micro-fabrication facilities for Australia’s researchers. B.D. also gratefully acknowledges China Postdoctoral Science Foundation (2018M632300), open fund of Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology, and Fujian Provincial Key Laboratory of Functional Materials and Applications.
© 2019 Elsevier B.V.
All Science Journal Classification (ASJC) codes
- Environmental Chemistry
- Chemical Engineering(all)
- Industrial and Manufacturing Engineering