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Zhengmin Yu,Xiaoli Su,Denghu Wei,Shu-Juan Yao,Huiyan Ma,Hui Zhao,Xipeng Pu,Wenzhi Li,Jie Wang 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2019 NANO Vol.14 No.4
3D structure composite made of tiny basic nickel carbonate arrays on the surface of reduced graphene oxide nanosheets (G-NiCH) are prepared by the hydrothermal method. The specific surface area of the G-NiCH composites is twice that of single basic nickel carbonate, which is due to the tiny basic nickel carbonate arrays structure wherein each individual nanoneedle is about 20 nm in length and 2 nm in width. The G-NiCH electrodes display high-efficiency electrochemical performance with good specific capacitance (1230 F g -1) and excellent stability (100% capacitance retention after 2000 cycles). This is attributed to the synergistic effect that reduced graphene oxide offer fast electron transmission path and basic nickel carbonate act as high effective active material.