Nano 'sandwich' feeds performance gains for rechargeable lithium-ion batteries

April 20, 2015 // By Paul Buckley
Molybdenum disulfide nanosheets which 'sandwich' one molybdenum atom between two sulfur atoms could become the key to opening performance gains for rechargeable lithium-ion batteries according to researchers Kansas State University.

Gurpreet Singh, assistant professor of mechanical and nuclear engineering, and his research team are looking to improve rechargeable lithium-ion battery performance. The team has focused on the lithium cycling of molybdenum disulfide, or MoS2, sheets and the the team has found that silicon carbonitride-wrapped molybdenum disulfide sheets show improved stability as a battery electrode with little capacity fading.

The findings have been published in Nature's Scientific Reports in the article entitled 'Polymer-Derived Ceramic Functionalized MoS2Composite Paper as a Stable Lithium-Ion Battery Electrode'. Singh's team observed that molybdenum disulfide sheets store more than twice as much lithium - or charge - than bulk molybdenum disulfide reported in previous studies. The researchers also found that the high lithium capacity of these sheets does not last long and drops after five charging cycles.