119th General Meeting of the KCS

Type Poster Presentation
Area 전기화학
Room No. 포스터발표장
Time 4월 21일 (금요일) 13:00~14:30
Code ELEC.P-527
Subject Electrochemical Stability of Graphene Coated Current Collectors in Grignard Reagent-Based Electrolytes for Magnesium Ion Battery
Authors S.J. Richard Prabakar, 표명호*
순천대학교 인쇄전자공학과, Korea
Abstract The electrochemical stabilities of several non-noble metal current collector electrodes in a magnesium ion battery (MIB) using tetrahydrofuran solution containing phenylmagnesium chloride and aluminum chloride (Grignard reagent type electrolyte) was investigated. The cyclic voltammetry and chronoamperometry studies revealed pitting type corrosion on non-noble metal electrodes at high potentials, wherein the chloride ions were responsible, which eventually lowered the corrosion resistance. In this investigation, we explore the possibilities of graphene and functionalized graphene as protective coatings on the non-noble metal current collector electrodes. From cyclic voltammetry and chronoamperometry studies, the graphene (or functionalized graphene) coated non-noble metal electrodes showed considerable improvement in corrosion resistance, predominantly with a notable suppression of electrolyte oxidation at high potentials, without the 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 believe graphene coating to behave as a barrier to chloride ion permeation and prevent the corrosion of the underlying metal for longer periods. Additionally, graphene (or functionalized graphene) can diminish the microcracks and micropores of the metal surface to decrease the corrosive area. The results show that the graphene/functionalized graphene coated non-noble metal electrodes can be suitable replacements for the expensive Pt electrode in a corrosive Grignard reagent type electrolyte for MIB.
E-mail richiechem@gmail.com