Morphology-dependent binder-free CuNiO2electrode material with excellent electrochemical performances for supercapacitors

Chang Seob Song, Chandu V.V.Muralee Gopi, Rajangam Vinodh, Sangaraju Sambasivam, Reddi Mohan Naidu Kalla, Ihab M. Obaidat, Hee Je Kim

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Rational design for structure and morphology of multi-component metal oxides is an efficient and promising way to enhance energy storage performance of electrode materials. In this present work, nanosheet-like CuNiO2 heterostructures are fabricated using facile one-step hydrothermal route by introducing various amounts of ammonium fluoride (NH4F) as structure-directing agent. The NH4F assisted synthesis of CuNiO2 materials on Ni foam current collector can be effectively utilized as binder-free battery-type electrode materials for supercapacitors. With an assistance of NH4F, the structural, morphological and composition evolutions of CuNiO2 electrodes are discussed effectively using X-ray diffraction, scanning electron microscopy and transmission electron microscopy and X-ray photoelectron spectroscopy characterizations. The CuNiO2 electrode material prepared with 0.4 M NH4F provides large number of active sites, superior conductivity and rapid charge transfer, which are promote fast Faradaic redox reactions. As a battery-type material, the optimized 0.4-CuNiO2 electrode material (NH4F is 0.4 M) exhibits a high specific capacity (~153.02 mA h g−1 at 2 A g−1), excellent rate capability (~87.4% retains even at 10 A g−1), and outstanding cycling stability (~94.14% at 6 A g−1 over 3000 cycles), respectively. Thereby, this study paves the path into rational design for structure and morphology of multi-component metal oxides for improving energy storage performance.

Original languageEnglish
Article number101037
JournalJournal of Energy Storage
Volume26
DOIs
Publication statusPublished - Dec 2019

Keywords

  • Ammonium fluoride
  • CuNiO
  • Hydrothermal route
  • Nanosheet-like
  • Supercapacitor

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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