High Areal Capacity Hybrid Magnesium–Lithium-Ion Battery with 99.9% Coulombic Efficiency for Large-Scale Energy Storage
- 23 March 2015
- journal article
- Published by American Chemical Society (ACS) in ACS Applied Materials & Interfaces
- Vol. 7 (12), 7001-7007
- https://doi.org/10.1021/acsami.5b01206
Abstract
Hybrid magnesium-lithium-ion batteries (MLIBs) featuring dendrite-free deposition of Mg anode and Li-intercalation cathode are safe alternatives to Li-ion batteries for large-scale energy storage. Here we report for the first time the excellent stability of a high areal capacity MLIB cell and dendrite-free deposition behavior of Mg under high current density (2 mA cm(-2)). The hybrid cell showed no capacity loss for 100 cycles with Coulombic efficiency as high as 99.9%, whereas the control cell with a Li-metal anode only retained 30% of its original capacity with Coulombic efficiency well below 90%. The use of TiS2 as a cathode enabled the highest specific capacity and one of the best rate performances among reported MLIBs. Postmortem analysis of the cycled cells revealed dendrite-free Mg deposition on a Mg anode surface, while mossy Li dendrites were observed covering the Li surface and penetrated into separators in the Li cell. The energy density of a MLIB could be further improved by developing electrolytes with higher salt concentration and wider electrochemical window, leading to new opportunities for its application in large-scale energy storage.Keywords
Funding Information
- Cullen College of Engineering, University of Houston
- Office of Naval Research (N00014-13-1-0543)
This publication has 37 references indexed in Scilit:
- Failure Mechanism for Fast‐Charged Lithium Metal Batteries with Liquid ElectrolytesAdvanced Energy Materials, 2014
- Interconnected hollow carbon nanospheres for stable lithium metal anodesNature Nanotechnology, 2014
- Low-Cost, Dendrite-Blocking Polymer-Sb2O3Separators for Lithium and Sodium BatteriesJournal of the Electrochemical Society, 2014
- Manipulating surface reactions in lithium–sulphur batteries using hybrid anode structuresNature Communications, 2014
- Rechargeable batteries: challenges old and newJournal of Solid State Electrochemistry, 2012
- Li–O2 and Li–S batteries with high energy storageNature Materials, 2011
- Electrical Energy Storage for the Grid: A Battery of ChoicesScience, 2011
- Study of the charging process of a LiCoO2-based Li-ion batteryJournal of Power Sources, 2006
- Factors Which Limit the Cycle Life of Rechargeable Lithium (Metal) BatteriesJournal of the Electrochemical Society, 2000
- Solutions of LiAsF6 in 1,3-dioxolane for secondary lithium batteriesJournal of Power Sources, 1992