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Capacity of Lithium-Ion Batteries Determined by Graphite Wetting Behaviour – The Green Optimistic

Researchers from University of Pittsburgh discovered that the performance of lithium-ionbatteries and super capacitors made fromgraphite andgraphene is affected by their exposure towater. The study published last week in Nature Materials shows that opposite to common beliefs graphite and graphene have hydrophilicproperties.

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The idea for the research came as a former undergraduate engineering student, Rebecca McGinley, came across inconsistencies in the abilities of the material to react with water. Studying the phenomenon more closely, the scientists established that air contaminates the thin layer of hydrocarbon.

By using infrared spectroscopy and X-ray photoelectron spectroscopy, the team was able to determine the hydrophobic nature of the surface. However, once the contaminated layer was removed using heat, the scientists were able to observe that the materials became hydrophilic.

More http://www.greenoptimistic.com/2013/07/31/capacity-of-lithium-ion-batteries-determined-by-graphite-wetting-behaviour/#.UftRyol5mc0

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