Electrodeposited nickel aluminum-layered double hydroxide on Co3O4 as binder-free electrode for supercapacitor

Xin Chen, Heng Yuzhi, Li Hui, Sungchul Bae, Li Ang, Zhen Wang, Kwan San Hui, Kwun Nam Hui, Erfan Zal Nezhad

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

Here, we report a heterostructured core–shell electrode consists of cobalt oxide (Co3O4 ) nanowire core and nickel aluminum (NiAl)-layered double hydroxide (NiAl-LDH; herein Co3O4@LDH) nanosheet shell grown on nickel foam as advanced electrode for supercapacitor. Benefiting from the core–shell configuration and smart hybridization, the optimized Co3O4@LDH core–shell electrode exhibits a high capacitance of 2011 Fg−1 at 2Ag−1 and remains 1455 Fg−1 at 40 Ag−1 , which outperforms the electrochemical performance of individual component of Co3O4 (720 Fg−1 at 2 Ag−1). A hybrid supercapacitor using Co3O4@LDH as positive electrode and carbon nanotube as negative electrode delivers an energy density of 18.1 Whkg−1 at a power density of 375 kWkg−1 at a current density of 0.5 Ag−1 . Smart hybridization of core–shell electrode shows great promise as advanced electrode materials for supercapacitor with high electrochemical performance.

Original languageEnglish
Pages (from-to)2419-2430
Number of pages12
JournalJournal of Materials Science: Materials in Electronics
Volume30
Issue number3
Early online date17 Dec 2018
DOIs
Publication statusPublished - 15 Feb 2019

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