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Graphene supercapacitor breaks storage record


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DePurpereWolf

    DePurpereWolf


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Geplaatst op 02 december 2010 - 17:39

Graphene supercapacitor breaks storage record

Researchers in the US have made a graphene-based supercapacitor that can store as much energy per unit mass as nickel metal hydride batteries but unlike batteries, it can be charged or discharged in just minutes or even seconds. The new device has a specific energy density of 85.6 Wh/kg at room temperature and 136 Wh/kg at 80 C. These are the highest ever values for "electric double layer" supercapacitors based on carbon nanomaterials.

Supercapacitors, more accurately known as electric double-layer capacitors or electrochemical capacitors, can store much more charge than conventional capacitors. An important feature of supercapacitors is that there is an extremely narrow gap between the electrodes which are ultrathin layers. This means that a large amount of electrical charge can be stored in a tiny volume.

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Lees verder: http://physicsworld....icle/news/44477

Bron: physicsworld.com

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