Journal
NANOMATERIALS
Volume 9, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/nano9091225
Keywords
linear PEI; N-doped carbon nanonet flask (NCNFs); template-assisted synthesis; electrochemical properties; supercapacitor
Categories
Funding
- National Natural Science Foundation of China (NSFC) [51502268, 51325203, 51574205]
- Excellent Young Teacher Development Foundation of Zhengzhou University [1421320050]
- Key Science and Technology Research Projects of Henan Provincial Education Department [14B430023]
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Novel N-doped carbon nanonet flakes (NCNFs), consisting of three-dimensional interconnected carbon nanotube and penetrable mesopore channels were synthesized in the assistance of a hybrid catalytic template of silica-coated-linear polyethyleneimine (PEI). Resorcinol-formaldehyde resin and melamine were used as precursors for carbon and nitrogen, respectively, which were spontaneously formed on the silica-coated-PEI template and then annealed at 700 degrees C in a N-2 atmosphere to be transformed into the hierarchical 3D N-doped carbon nanonetworks. The obtained NCNFs possess high surface area (946 m(2) g(-1)), uniform pore size (2-5 nm), and excellent electron and ion conductivity, which were quite beneficial for electrochemical double-layered supercapacitors (EDLSs). The supercapacitor synthesized from NCNFs electrodes exhibited both extremely high capacitance (up to 613 F g(-1) at 1 A g(-1)) and excellent long-term capacitance retention performance (96% capacitive retention after 20,000 cycles), which established the current processing among the most competitive strategies for the synthesis of high performance supercapacitors.
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