27 Aug '13, 11am

3D graphene could replace platinum in PV: Scientists at Michigan Technological University have developed a new...

While only small amounts of platinum in dye-sensitized solar cells are required, it is expensive at US$1,500 an ounce. The University team invented a novel approach to synthesize a unique 3D version of grapheme with a honeycomb-like structure. To do so, they combined lithium oxide with carbon monoxide in a chemical reaction that forms lithium carbonate (Li2 CO3 ) and the honeycomb graphene. The Li2 CO3 helps shape the graphene sheets and isolates them from each other, preventing the formation of garden-variety graphite. The Li2 CO3 3 particles can be easily removed from 3D honeycomb-structured graphene by an acid. The scientists determined that the 3D honeycomb graphene had excellent conductivity and high catalytic activity, raising the possibility that it could be used for energy storage and conversion. So they replaced the platinum counter electrode in a dye-sensitized s...

Full article: http://www.renewableenergyfocus.com/view/34178/3d-graphen...

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3D Graphene Could Make Solar Cells Cheaper | EE Times via @eetimes

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