Novel 3D porous graphene decorated with Co₃O₄/CeO₂ for high performance supercapacitor power cell

曹云岳¹，刘成宝^1,2，钱君超^1,2，陈志刚^1,2，陈丰^1,2

1. Jiangsu Key Laboratory for Environment Functional Materials, Suzhou University of Science and Technology2. School of Chemistry,Biology and Materials Engineering, Suzhou University of Science and technology

摘 要：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 Co₃O₄-CeO₂ 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 Co₃O₄-CeO₂ 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 Co₃O₄-CeO₂nano-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.

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