226. Eco-friendly synthesis of hierarchical ginkgo-derived carbon nanoparticles/NiAl-layered double hydroxide hybrid electrodes toward high-performance supercapacitors.
作者：M. K. Liu, S. X. He, Y. E. Miao, Y. P. Huang, H. Y. Lu, L. S. Zhang, T. X. Liu*
關(guān)鍵字：layered double hydroxide, hybrid electrode, supercapacitors
論文來源：期刊
具體來源：RSC Advances, 2015, 5(68), 55109-55118.
發(fā)表時間：2015年
Three-dimensional carbon nanoparticles (CPs)/Ni–Al layered double hydroxide (NiAl-LDH) (CP/LDH) hybrids with hierarchical nanostructures have been facilely prepared with NiAl-LDH nanosheets homogeneously located on the surface of CPs through an in situ hydrothermal growth process. Ecofriendly synthesized from the fallen ginkgo leaves, CPs with mesoporous architecture are chemically activated and used as building blocks for the construction of hierarchical CP/LDH hybrids. Mesoporous CPs coupled with the NiAl-LDH nanosheets are favorable to improve the mass transfer, adsorption/desorption of ions, as well as the electrochemical performance of the electrodes. The electrochemical measurements show that CP/LDH hybrid exhibits a remarkably enhanced specific capacitance of 1355 F g-1 at 5 mV s-1, compared with 121 F g-1 of CPs and 405 F g-1 of pure NiAl-LDHs, as a result of the synergistic effect from electrochemical double layer capacitance of CPs and pseudocapacitance of NiAl-LDHs. Furthermore, the CP/LDH hybrid shows excellent rate capability and good long-term cycling performance with 90% capacitance retained after 2000 cycles. Therefore, the facilely prepared CP/LDH hybrids are promising electrode materials for potential applications in energy storage devices.