论文部分内容阅读
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.
Tremendous research efforts have been aimed at ever-increasing worldwide energy demand. The purpose of this hybrid supercapacitor power cell were prepared by composing 3D porous graphene decorated with Co_3O_4-CeO_2 nano-particles according to using flower stems as biotemplate. 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 p resented a simple strategy for fabrication of novel energy storage devices.