120th General Meeting of the KCS

Type Poster Presentation
Area Electrochemistry
Room No. Exhibition Hall 2+3
Time 10월 20일 (금요일) 13:00~14:30
Code ELEC.P-472
Subject Enhanced Electrochemical Stability of Electrolyte and Corrosion Suppression on GO Coated Current Collectors in Grignard Reagent-Based Electrolytes (APC) for Magnesium Ion Battery
Authors Prabakar Richard, myoungho pyo*
Department of Printed Electronics Engineering, Suncheon National University, Korea
Abstract The electrochemical stabilities of some non-noble metal current collector electrodes in a magnesium ion battery (MIB) using Grignard reagent type electrolyte (APC) were investigated, wherein the chloride ions were responsible, which eventually lowered the corrosion resistance and electrolyte stability. In this investigation, we explore the possibilities of graphene oxide (GO) coatings on the non-noble metal current collector electrodes (Al, Cu and SS) via electrophoretic deposition. The GO-coated substrates displayed significantly large improvement in corrosion resistance, predominantly with a notable suppression of electrolyte decomposition at high potentials (4.0V), without the reversible deposition/stripping of Mg being affected. Studies showed a variance in the corrosion resistance which was dependent on the functional groups on graphene, coating effectiveness and thickness. We address that such a remarkable improvement by GO-coating is associated with electrostatic charge interaction between ion charges of electrolytes and surface-functional groups of GO. In addition, GO-coating does not aggravate the cathode performance of Mo6S8, allowing the use of non-noble metals as current collectors as replacement to expensive Pt current collector electrode.
E-mail richiechem@gmail.com