Three-Dimensional Network of N-Doped Carbon Ultrathin Nanosheets with Closely Packed Mesopores: Controllable Synthesis and Application in Electrochemical Energy Storage.
A flexible one-pot strategy for fabricating a 3D network of nitrogen-doped (N-doped) carbon ultrathin nanosheets with closely packed mesopores (N-MCN) via an in situ template method is reported in this research. The self-assembly soluble salts (NaCl and Na2SiO3) serve as hierarchical templates and support the formation of a 3D glucose-urea complex. The organic complex is heat-treated to obtain a 3D N-doped carbon network constructed by mesoporous nanosheets. Especially, both the mesoporous structure and doping content can be easily tuned by adjusting the ratio of raw materials. The large specific surface area and closely packed mesopores facilitate the lithium ion intercalation/deintercalation accordingly. Besides, the nitrogen content improves the lithium storage ability and capacitive properties. Due to the synergistic effect of hierarchical structure and heteroatom composition, the 3D N-MCN shows excellent characteristics as the electrode of a lithium ion battery and supercapacitor, such as ultrahigh reversible storage capacity (1222 mAh g(-1) at 0.1 A g(-1)), stable long cycle performance at high current density (600 cycles at 2 A g(-1)), and high capacitive properties (225 F g(-1) at 1 A g(-1) and 163 F g(-1) at 50 A g(-1)).
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Shan
S
Zhu
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Jiajun
J
Li
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Liying
L
Ma
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Lichao
L
Guo
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Qunying
Q
Li
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.|Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300350, China.|Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin 300350, China.
Chunnian
C
He
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.|Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300350, China.
Enzuo
E
Liu
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Fang
F
He
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.
Chunsheng
C
Shi
School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials, Tianjin University , Tianjin 300350, China.|Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300350, China.|Key Laboratory of Advanced Ceramics and Machining Technology, Ministry of Education , Tianjin 300350, China.
Naiqin
N
Zhao
3D network; in situ salt templates; lithium ion battery; mesoporous carbon nanosheets; nitrogen-doping; supercapacitor