Issue 68, 2015

Eco-friendly synthesis of hierarchical ginkgo-derived carbon nanoparticles/NiAl-layered double hydroxide hybrid electrodes toward high-performance supercapacitors

Abstract

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. Eco-friendly 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.

Graphical abstract: Eco-friendly synthesis of hierarchical ginkgo-derived carbon nanoparticles/NiAl-layered double hydroxide hybrid electrodes toward high-performance supercapacitors

Supplementary files

Article information

Article type
Paper
Submitted
21 Apr 2015
Accepted
16 Jun 2015
First published
16 Jun 2015

RSC Adv., 2015,5, 55109-55118

Eco-friendly synthesis of hierarchical ginkgo-derived carbon nanoparticles/NiAl-layered double hydroxide hybrid electrodes toward high-performance supercapacitors

M. Liu, S. He, Y. Miao, Y. Huang, H. Lu, L. Zhang and T. Liu, RSC Adv., 2015, 5, 55109 DOI: 10.1039/C5RA07215H

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