Nickel-based layered double hydroxide from guest vanadium oxide anions

Hae Woong Park, Ji Su Chae, Sun Min Park, Kwang Bum Kim, Kwang Chul Roh

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11 Citations (Scopus)

Abstract

The layered double hydroxides (LDHs) are well known for ionic exchange properties to intercalate anionic compound in interlayer region. The Ni/V LDH composite was explored by co-precipitation method. The maximum capacitance of Ni/V LDH composite was 2612 F g-1 at the scan rate 2 mV s -1. As-synthesized Ni/V LDH composite provides a three-dimensional conducting network frame for manifesting electrochemical capacitance. This is because the insertion of vanadium oxide anions (VOx -) into nickel interlayer space between nickel layers is compensated for hydroxyl vacancies during synthesis of lower-pH condition. The network frame makes it possible to promote fast electron transfer for Ni/V LDH composite electrode material and consequently allows the improvement of the electronic conductivity for Ni/V LDH composite electrode material. Thus, the Ni/V LDH composite exhibits high capacitance than β-Ni(OH)2 due to its unique properties, with vanadium oxide anions embedded in the turbostratic structure and shorter diffusion pathway.

Original languageEnglish
Pages (from-to)887-894
Number of pages8
JournalMetals and Materials International
Volume19
Issue number4
DOIs
Publication statusPublished - 2013 Jul 1

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All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

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