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-521
Subject Comparison of electrochemical property of Mo6S8 in various electrolytes
Authors IKHE AMOL BHAIRUBA, 표명호*
순천대학교 인쇄전자공학과, Korea
Abstract Magnesium (Mg) ion batteries are one of the promising candidate systems to possibly surpass the volumetric density of LIBs, suppressing lithium dendritic growth, because Mg possesses two valence electrons and has a low standard reduction potential (-2.37 V vs. SHE). However, there are two major issues in developing the magnesium rechargeable batteries, which are: (i) slow diffusion of Mg2+ ions in active materials; (ii) relatively narrow potential windows of Mg2+-based electrolytes. The first successful magnesium deposition/dissolution in Mg2+ electrolytes was reported by Aurbach group, using Mg organohaloaluminate salts. Inspired by this seminal work, researchers tried to increase the potential window (up to 2.3 V vs. Mg in APC-type) and to replace the toxic Grignard-based electrolytes. Various common electrolytes such as Mg(TFSI)2, Mg(ClO4)2, Mg(TFS), and MgCl2 and their combinations were reported to show higher anodic limits and reversible Mg2+ insertion/deinsertion in/out of Mo6S8. Herein, we also reports several combinations of common magnesium salt in ether type solvents to achieve high anodic limit, reversible Mg plating/ stripping, and reversible Mg2+ insertion/deinsertion for Mo6S8. The systems we evaluated as electrolytes for MIBs are: Mg(TFSI)2:MgCl2/THF (glyme families), Mg(TFS)2:MgCl2/ THF (glyme families), Mg(TFSI)2:AlCl3/ THF (glyme families), and more. Electrochemical stability of these electrolytes and electroactivity of Mo6S8 will be presented.
E-mail ikheamol@gmail.com