期刊
SCIENTIFIC REPORTS
卷 4, 期 -, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/srep07054
关键词
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资金
- Jiangsu Provincial Founds for Distinguished Young Scholars [BK20130046]
- NNSF of China [21275076, 61328401]
- Key Project of Chinese Ministry of Education [212058]
- Program for New Century Excellent Talents in University [NCET-13-0853]
- Research Fund for the Doctoral Program of Higher Education of China [20123223110008]
- Qing Lan Project, Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- SERC Grant from the Agency for Science, Technology and Research (A*STAR, Singapore) [102170 0142]
- National Synergistic Innovation Center for Advanced Materials (SICAM)
A facile and phase-controlled synthesis of alpha-NiS nanoparticles (NPs) embedded in carbon nanorods (CRs) is reported by in-situ sulfurating the preformed Ni/CRs. The nanopore confinement by the carbon matrix is essential for the formation of alpha-NiS and preventing its transition to beta-phase, which is in strong contrast to large aggregated beta-NiS particles grown freely without the confinement of CRs. When used as electrochemical electrode, the hybrid electrochemical charge storage of the ultrasmall alpha-NiS nanoparticels dispersed in CRs is benefit for the high capacitor (1092, 946, 835, 740 F g(-1) at current densities of 1, 2, 5, 10 A g(-1), respectively.). While the high electrochemical stability (approximately 100% retention of specific capacitance after 2000 charge/discharge cycles) is attributed to the supercapacitor-battery electrode, which makes synergistic effect of capacitor (CRs) and battery (NiS NPs) components rather than a merely additive composite. This work not only suggests a general approach for phase-controlled synthesis of nickel sulfide but also opens the door to the rational design and fabrication of novel nickel-based/carbon hybrid supercapacitor-battery electrode materials.
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