3D porous layered double hydroxides grown on graphene as advanced electrochemical pseudocapacitor materials

Luojiang Zhang, Jie Wang, Jiajia Zhu, Xiaogang Zhang, Kwan San Hui, Kwun Nam Hui

Research output: Contribution to journalArticlepeer-review

203 Citations (Scopus)

Abstract

A 3D hybrid nickel-aluminum layered double hydroxide (NiAl-LDH)–graphene nanosheets (GNS) composite as a supercapacitor material has been fabricated by in situ deposition of LDH nanosheets on graphene oxide (GO) through a liquid phase deposition method. The results reveal that NiAl-LDH homogeneously grew on the surface of GNS as spacers to keep the neighboring sheets separate. Optimum effects could be achieved when feeding ratio, reaction time and temperature are tuned. The obtained porous GNS/NiAl-LDH composite exhibited high-capacitance performance with a specific capacitance of 1255.8 F g−1 at a current density of 1 A g−1 and 755.6 F g−1 at 6 A g−1, respectively. Moreover, the composite exhibited excellent cycling performance with an increase of 6% capacitance compared with the initial capacitance after 1500 cycle tests. Such high specific capacitance, rate capability and exceptional cycling ability of the composite offered great promise in energy storage device applications.
Original languageEnglish
Pages (from-to)9046-9053
Number of pages8
JournalJournal of Materials Chemistry A
Volume1
Issue number32
Early online date6 Jun 2013
DOIs
Publication statusPublished - 28 Aug 2013

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