Controlling the Intercalation Chemistry to Design High-Performance Dual-Salt Hybrid Rechargeable Batteries
Open Access
- 7 November 2014
- journal article
- Published by American Chemical Society (ACS) in Journal of the American Chemical Society
- Vol. 136 (46), 16116-16119
- https://doi.org/10.1021/ja508463z
Abstract
We have conducted extensive theoretical and experimental investigations to unravel the origin of the electrochemical properties of hybrid Mg(2+)/Li(+) rechargeable batteries at the atomistic and macroscopic levels. By revealing the thermodynamics of Mg(2+) and Li(+) co-insertion into the Mo6S8 cathode host using density functional theory calculations, we show that there is a threshold Li(+) activity for the pristine Mo6S8 cathode to prefer lithiation instead of magnesiation. By precisely controlling the insertion chemistry using a dual-salt electrolyte, we have enabled ultrafast discharge of our battery by achieving 93.6% capacity retention at 20 C and 87.5% at 30 C, respectively, at room temperature.Keywords
Funding Information
- Dow Chemical Company
- Ministry of Trade, Industry and Energy (20112010100140)
- Korea Institute of Science and Technology (2E24663)
- Northwestern-Argonne Institute of Science and Engineering
This publication has 23 references indexed in Scilit:
- Electrolyte roadblocks to a magnesium rechargeable batteryEnergy & Environmental Science, 2012
- New Insight on the Unusually High Ionic Mobility in Chevrel PhasesChemistry of Materials, 2009
- Electrolyte Solutions with a Wide Electrochemical Window for Rechargeable Magnesium BatteriesJournal of the Electrochemical Society, 2008
- Phase Diagram of Mg Insertion into Chevrel Phases, MgxMo6T8 (T = S, Se). 1. Crystal Structure of the SulfidesChemistry of Materials, 2006
- Phase Diagram of Mg Insertion into Chevrel Phases, MgxMo6T8 (T = S, Se). 2. The Crystal Structure of Triclinic MgMo6Se8Chemistry of Materials, 2006
- Improved Electrolyte Solutions for Rechargeable Magnesium BatteriesElectrochemical and Solid-State Letters, 2006
- Leaching Chemistry and the Performance of the Mo6S8 Cathodes in Rechargeable Mg BatteriesChemistry of Materials, 2004
- Kinetic and Thermodynamic Studies of Mg[sup 2+] and Li[sup +] Ion Insertion into the Mo[sub 6]S[sub 8] Chevrel PhaseJournal of the Electrochemical Society, 2004
- Nonaqueous magnesium electrochemistry and its application in secondary batteriesThe Chemical Record, 2003
- Prototype systems for rechargeable magnesium batteriesNature, 2000