Tremendous research efforts have been aimed at ever-increasing worldwide energy demand. For this purpose, the hybrid supercapacitor power cell were prepared composing 3D porous graphene decorated with Co_3O_4-CeO_2 na...Tremendous research efforts have been aimed at ever-increasing worldwide energy demand. For this purpose, the hybrid supercapacitor power cell were prepared composing 3D porous graphene decorated with Co_3O_4-CeO_2 nano-particles herein by using flower stem as biotemplate. The resulting samples were characterized by field emission scanning electron microscopy（FESEM）, transmission electron microscopy（TEM）, Raman spectra, X-ray diffraction spectroscopy（XRD）, nitrogen adsorption and desorption, X-ray photoelectron spectrogram（XPS）, and electrochemical test. The 3D graphene acted as an excellent carrier together with Co_3O_4-CeO_2 nano-particles, boosting the specific capacitance of composite（221 F/g）, which exceeded the theoretical value limit. This facile biotemplate method of research provided an eco-friendly and cut-price route to obtain high-quality graphene and Co_3O_4-CeO_2nano-composites owing to the unique porous structure derived from original template（flower stem）. The finding presented a simple strategy for fabrication of novel energy storage devices.展开更多
基金supported by the National Natural Science Foundation of China(51478285,21407111)Natural Science Foundation of Jiangsu Province(BK20140280,BK20151198)+2 种基金Collegiate Natural Science Fund of Jiangsu Province(14KJA430004,16KJA430008)the 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
文摘Tremendous research efforts have been aimed at ever-increasing worldwide energy demand. For this purpose, the hybrid supercapacitor power cell were prepared composing 3D porous graphene decorated with Co_3O_4-CeO_2 nano-particles herein by using flower stem as biotemplate. The resulting samples were characterized by field emission scanning electron microscopy（FESEM）, transmission electron microscopy（TEM）, Raman spectra, X-ray diffraction spectroscopy（XRD）, nitrogen adsorption and desorption, X-ray photoelectron spectrogram（XPS）, and electrochemical test. The 3D graphene acted as an excellent carrier together with Co_3O_4-CeO_2 nano-particles, boosting the specific capacitance of composite（221 F/g）, which exceeded the theoretical value limit. This facile biotemplate method of research provided an eco-friendly and cut-price route to obtain high-quality graphene and Co_3O_4-CeO_2nano-composites owing to the unique porous structure derived from original template（flower stem）. The finding presented a simple strategy for fabrication of novel energy storage devices.
