期刊
SCIENTIFIC REPORTS
卷 8, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41598-018-21082-w
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资金
- National Natural Science Foundation of China [51203071, 51363014, 51463012, 51763014]
- China Postdoctoral Science Foundation [2014M552509, 2015T81064]
- Natural Science Funds of the Gansu Province [1506RJZA098]
- Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology [J201402]
- NATIONAL INSTITUTE OF GENERAL MEDICAL SCIENCES [UL1GM118967] Funding Source: NIH RePORTER
N-doped carbon nanosheets/vanadium nitride nanoparticles (N-CNS/VNNPs) are synthesized via a novel method combining surface-initiated in-situ intercalative polymerization and thermal-treatment process in NH3/N-2 atmosphere. The pH value of the synthesis system plays a critical role in constructing the structure and enhancing electrochemical performance for N-CNS/VNNPs, which are characterized by SEM, TEM, XRD, and XPS, and measured by electrochemical station, respectively. The results show that N-CNS/VNNPs materials consist of 2D N-doped carbon nanosheets and 0D VN nanoparticles. With the pH value decreasing from 2 to 0, the sizes of both carbon nanosheets and VN nanoparticles decreased to smaller in nanoscale. The maximum specific capacitance of 280 F g(-1) at the current density of 1 A g(-1) for N-CNS/VNNPs is achieved in three-electrode configuration. The asymmetric energy device of Ni(OH)(2)parallel to N-CNS/VNNPs offers a specific capacitance of 89.6 F g(-1) and retention of 60% at 2.7 A g(-1) after 5000 cycles. The maximum energy density of Ni(OH)(2)parallel to N-CNS/VNNPs asymmetric energy device is as high as 29.5 Wh kg(-1).
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