期刊
ADVANCED FUNCTIONAL MATERIALS (CMC 2017)
卷 -, 期 -, 页码 109-118出版社
SPRINGER-VERLAG SINGAPORE PTE LTD
DOI: 10.1007/978-981-13-0110-0_14
关键词
Graphene; Mn(3)o(4) nanoparticles; Hydrothermal method; Electrochemical properties; Supercapacitor
资金
- National Natural Science Foundation of China [51478285, 21407111, 21576175]
- Natural Science Foundation of Jiangsu Province [BK20140280, BK20151198]
- Collegiate Natural Science Fund of Jiangsu Province [14KJA430004, 16KJA430008]
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Jiangsu Collaborative Innovation Center of Technology and Material for Water Treatment
- Excellent Innovation Team in Science and Technology of Education Department of Jiangsu Province
- Jiangsu Key Laboratory for Environment Functional Materials [SJHG1304, SJHG1310, SJHG1404]
- Creative Project of Postgraduate of Jiangsu Province [KYLX16_1356]
Graphene was prepared by using the plant stem as a biotemplate through high temperature carbonization and Mn3O4/graphene composites were then prepared via a simple hydrothermal process. The surface morphology and structure of the Mn3O4/graphene hybrids were characterized by X-ray diffraction spectroscopy (XRD), Raman spectra, field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectrogram (XPS), N-2 adsorption-desorption isotherms and electrochemical test. The results showed that the metal oxide nanoparticles were uniformly supported on the surface of graphene. Judging from the XRD, XPS and Raman, we could acquire that the Mn3O4 nanoparticle was in the crystal form while the average crystallite size was about 21 nm. The composites exhibited excellent specific capacitance as high as 196 F/g and the capacitance of the composites was 88% retained after 1000 cycles in 1 M Na2SO4 electrolyte at a charging rate of 2 A/g. The superior electrochemical properties could be due to the improved accessible area for ions in electrolytes and enhanced conductivities. The present study provides a facile way to design a high-performance Mn3O4/graphene based supercapacitor electrode and the concept is extendable to other pseudo capacitive electrodes.
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