Preparation of CoAl layered double hydroxide nanoflake arrays and their high supercapacitance performance

Pan Guoxiang*, Xia Xinhui, Luo Jingshan, Cao Feng, Yang Zhihong, Fan Hongjin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Citations (Scopus)

Abstract

Porous cobalt aluminum layered double hydroxide (CoAl-LDH) nanoflake arrays on nickel foam were synthesized by a facile hydrothermal synthesis method. The obtained CoAl-LDH film consisted of interconnected nanoflakes with the thicknesses of ~. 20. nm and showed an extended net-like structure. The electrochemical performance of CoAl-LDH nanoflake arrays was tested by cyclic voltammetry and galvanostatic charge/discharge test. The porous CoAl-LDH nanoflake arrays showed good pseudocapacitive performances with high capacitance and good cycle stability. At room temperature, the porous CoAl-LDH nanoflake arrays exhibited a high specific capacitance of 930. F/g at 2. A/g and their specific capacitances were still up to 669. F/g at 16. A/g. A good cycling stability was also observed for the CoAl-LDH nanoflake arrays with a capacitance retention of 88.9% of the highest value after 2000. cycles at 2. A/g.

Original languageEnglish
Pages (from-to)28-32
Number of pages5
JournalApplied Clay Science
Volume102
DOIs
Publication statusPublished - Dec 1 2014
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2014 Elsevier B.V.

ASJC Scopus Subject Areas

  • Geology
  • Geochemistry and Petrology

Keywords

  • CoAl layered double hydroxides
  • Nanoflake arrays
  • Porous film
  • Supercapacitor

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