|
Type |
Poster Presentation |
Area |
Electrochemistry |
Room No. |
Exhibition Hall 2+3 |
Time |
10월 20일 (금요일) 13:00~14:30 |
Code |
ELEC.P-478 |
Subject |
Magnesium aluminate triflate complex (MATC) as a new electrolyte system with wide electrochemical window for magnesium ion batteries |
Authors |
Amol Bhairuba Ikhe, myoungho pyo1,* Department of Printed Electronics Engineering, Suncheon National University, India 1Department of Printed Electronics Engineering, Suncheon National University, Korea |
Abstract |
Magnesium (Mg) ion battery has attracted much attention in the past two decades due to its high theoretical volumetric capacity (3833mAh/cm3) compared to lithium ion battery [850mAh/cm3 (Graphite anode)]. There are two major issues in developing the Mg rechargeable batteries, which are: (i) relatively narrow potential windows of Mg2+-based electrolytes; (ii) slow diffusion of Mg2+ ions in active materials. The first successful Mg deposition/dissolution in Mg2+ electrolytes was reported by Aurbach group, using Mg organohaloaluminate salts (APC). 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 non-Grignard type electrolytes such as MgCl2-AlCl3 (MACC), Mg(HMDS)2-AlCl3 and MgCl2-Mg(TFSI)2 have been reported. However, these electrolyte systems show relatively lower anodic limit, poor coulombic efficiency and/or battery performance. Herein, we report the combinations of magnesium triflate (MgTf2) and Lewis acid AlCl3 in ether type solvent (Diglyme) which displayed reversible Mg plating/stripping, high anodic limits, and good reversible Mg2+ insertion/de-insertion for the Mo6S8 cathode. The system we evaluated can be represented as xM MgTf2 + yM AlCl3/Diglyme and the active species [Mg2Cl3+] was identified and confirmed by ESI-mass spectroscopy. Electrochemical stability of electrolyte and cyclic stability of Mo6S8 in this electrolyte were studied. |
E-mail |
ikheamol@gmail.com |
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