Yoo, Hyun Deog Liang, Yanliang Li, Yifei Yao, Yan High Areal Capacity Hybrid Magnesium–Lithium-Ion Battery with 99.9% Coulombic Efficiency for Large-Scale Energy Storage 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<sup>–2</sup>). 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 TiS<sub>2</sub> 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. density;cathode;Coulombic efficiency;areal capacity MLIB cell;deposition;mossy Li dendrites;Mg anode surface;energy storage;batterie 2015-04-01
    https://acs.figshare.com/articles/journal_contribution/High_Areal_Capacity_Hybrid_Magnesium_Lithium_Ion_Battery_with_99_9_Coulombic_Efficiency_for_Large_Scale_Energy_Storage/2181601
10.1021/acsami.5b01206.s001