Investigation of Hydrogen Interactions with Metals and Carbon Nanostructures for Next Generation Energy Storage and Conversion Devices
November 4, 2016
Joseph Teprovich, Savannah River National Laboratory
Our experimental and theoretical investigation of the interaction of metal hydrides and complex metal hydrides with carbon nanostructure (C60, CNT’s, etc.) has demonstrated that these composites reversibly interact with hydrogen. Through a series of spectroscopic analysis of these materials, the active hydrogen storage material resembles a metal-doped hydrogenated fullerene. Owing to our ability to judiciously control the metal doping and hydrogen content of these materials, we can fine-tune the properties of the materials for new applications. This led to the remarkable enhancement in lithium ion conduction in LiBH4-C60 nanocomposites observed at room temperature. Experimental and theoretical work suggested a nanoionic mechanism is responsible for the enhanced ionic conduction due to the destabilization/breaking of the Li+/(BH4)– ion pair by C60. Our recent work has been focused on evaluating the photophysical properties of these carbon nanocomposites. The hydrogen content of these materials can be used fine-tune the emissive properties of the material with potential applications in luminescence down-shifting devices. This presentation will cover these findings in detail as well as on-going and future research on similar materials.