The lithium/sulfur cell was an extremely attractive redox couple because of high theoretical specific energy of 2600Wh/kg(1672mAh/g-sulfur), assuming complete reaction to the Li2S. However, it was very difficult to make a high utilization Li/S cell because of high resistivity and reactivity of sulfur.[1,2] Recently, some researchers overcame the problem of the insulating character of elemental sulfur in composite cathode by homogeneous mixing of an electronically conductive material such as carbon black powder.[3,4] However, the discharge capacity decreased drastically during charge-discharge cycling. Gorkoyenko mixed the vanadium oxides, silicates, aluminum oxide to the sulfur electrode. And, Han et al reported the cycle life of Li/S battery could be improved by addition of MWNT to the sulfur electrode.
In this study, we investigate to the effect of the addtion of nano material and the optimum amount of nanomaterial in sulfur cathode for Lithium/Sulfur battery.