A lithium-sulfur battery employing a high performances mesoporous hard carbon spherules-sulfur cathode and a stable, highly conducting electrolyte is reported. The results demonstrate that the battery cycles with very high capacity, i.e., of the order of 750 mAh g-1 with excellent retention during cycling. In addition, by exploiting the high conductivity of our selected electrolyte, the battery performs very well also at low temperature, i.e., delivering a capacity of 500 mAh g-1(S) at 0 °C for over 170 charge-discharge cycles. We believe that these results may substantially contribute to the progress of the lithium-sulfur battery technology. A porous hard carbon spherules-sulfur (HCS-S) composite cathode shows remarkable electrochemical behavior in a lithium cell using a solution of lithium triflate (LiCF3SO3) in tetraethylene glycol dimethyl ether (TEGDME) as the electrolyte. The new composite, characterized by high capacity, long cycle life, and remarkable sulfur content, is proposed as a new cathode material for high energy-lithium batteries.
An Advanced Lithium-Sulfur Battery
HASSOUN, Jusef;
2013
Abstract
A lithium-sulfur battery employing a high performances mesoporous hard carbon spherules-sulfur cathode and a stable, highly conducting electrolyte is reported. The results demonstrate that the battery cycles with very high capacity, i.e., of the order of 750 mAh g-1 with excellent retention during cycling. In addition, by exploiting the high conductivity of our selected electrolyte, the battery performs very well also at low temperature, i.e., delivering a capacity of 500 mAh g-1(S) at 0 °C for over 170 charge-discharge cycles. We believe that these results may substantially contribute to the progress of the lithium-sulfur battery technology. A porous hard carbon spherules-sulfur (HCS-S) composite cathode shows remarkable electrochemical behavior in a lithium cell using a solution of lithium triflate (LiCF3SO3) in tetraethylene glycol dimethyl ether (TEGDME) as the electrolyte. The new composite, characterized by high capacity, long cycle life, and remarkable sulfur content, is proposed as a new cathode material for high energy-lithium batteries.I documenti in SFERA sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
