Energy storage properties of hydrothermally processed ultrathin 2D binder-free ZnCo2O4nanosheets

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

2 Scopus Citations
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Author(s)

  • Muhammad Sufyan Javed
  • Saima Batool
  • Sajid Hussain Siyal
  • Tayyaba Najam
  • Syed Shoaib Ahmad Shah
  • Muhammad Imran
  • Mohammad A Assiri

Related Research Unit(s)

Detail(s)

Original languageEnglish
Article number385402
Journal / PublicationNanotechnology
Volume32
Issue number38
Online published2 Jul 2021
Publication statusPublished - 17 Sep 2021

Abstract

High energy-density supercapacitors (SCs) with long operating life, cost-effective, and competitive cycling performance is attracted great research attention to competing in the requirements of the modern age. However, despite these benefits, SC hampers inadequate rate-capability and structural deterioration, which primarily affects its commercialization. Herein, ultra-thin two-dimensional (2D) ZnCo2O4 nanosheets are in situ anchored on the conductive surface of nickel foam (denoted as ZCO@NF) by hydrothermal process. The binder-free ZCO@NF is employed as an electrode for SCs and shows impressive charge storage properties. ZCO@NF electrode exhibited a high capacitance of 1250 (750) and 733 F g-1 (440 C g-1) at 2.5 and 20 A g-1, respectively, demonstrating the outstanding rate-capability of 58.6% even at 8 times larger current density. Furthermore, the ZCO@NF electrode exhibits admirable capacitance retention of 96.5% after 10 000 cycles. This impressive performance of the ZCO@NF electrode is attributed to the high surface area which gives a short distance for ion/electron transfer, a high conductivity with extensive electroactive cities, and strong structural stability. The binder-free approach provides a strong relationship between the current collector and the active material, which turns into improved electrochemical operation as an electrode material for SCs.

Research Area(s)

  • binder-free, capacitance, nanosheets, supercapacitor, ZnCo2O4

Citation Format(s)

Energy storage properties of hydrothermally processed ultrathin 2D binder-free ZnCo2O4nanosheets. / Javed, Muhammad Sufyan; Hussain, Iftikhar; Batool, Saima; Siyal, Sajid Hussain; Najam, Tayyaba; Shah, Syed Shoaib Ahmad; Imran, Muhammad; Assiri, Mohammad A; Hussain, Shahid.

In: Nanotechnology, Vol. 32, No. 38, 385402, 17.09.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review