Supersonically Sprayed Zn2SnO4/SnO2/CNT Nanocomposites for High-Performance Supercapacitor Electrodes

Edmund Samuel, Tae Gun Kim, Chan Woo Park, Bhavana Joshi, Mark T. Swihart, Suk Goo Yoon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

In this study, we demonstrate rapid and facile supersonic cold spray deposition of Zn2SnO4/SnO2/CNT nanocomposite supercapacitor electrodes with promising combinations of power and energy density. Cyclic voltammetry confirmed the capacitive behavior of the optimized electrode, with specific capacitance reaching 260 F·g-1 at a current density of 10 A·g-1. We attribute this high performance to the optimal combination of CNT (carbon nanotube; double-layer capacitance) and Zn2SnO4/SnO2 (pseudocapacitance) properties. The mesoporous and accessible surface of the CNT significantly contributed to the excellent retention (approximately 93%) of the specific capacitance after 15000 galvanostatic charge/discharge cycles. In addition, the supercapacitor exhibited a remarkable energy density, electrochemical properties, and mechanical stability. The materials and approach presented here can enable cost-effective, efficient, and scalable production of high-performance supercapacitor electrodes.

Original languageEnglish
JournalACS Sustainable Chemistry and Engineering
DOIs
Publication statusPublished - 2019 Jan 1

Keywords

  • CNT
  • Cold spray technique
  • Nanocomposite
  • Supercapacitor
  • ZnSnO

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Renewable Energy, Sustainability and the Environment

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