Sponge-Like Graphene Makes Promising Supercapacitor Electrodes

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Michael Betts3

Sponge-like graphene makes promising supercapacitor electrodes

Zhanwei Xu

"Electrochemical Supercapacitor Electrodes from Sponge-like Graphene Nanoarchitectures with Ultrahigh Power Density." The Journal of Physical Chemistry Letters 2012, 3, 2928-2933. DOI: 10.1021/jz301207g

Abstract:

The sponge-like graphene is being looked at by researchers in Alberta, Canada. These sponge-like graphene nano particles have an ability to capture and maintain energy. This can change the electric car industry. Traditionally electric cars use Li-ion batteries that operate at 400 W/kg and these graphene particles operate at 48,000 w/kg. These batteries are said to be able to last longer and to charge in a matter of minutes. This difference in energy ability is that Li-ion are batteries where as the sponge-like graphene are super capacitors. Super capacitors are designed to work at much higher power density. This allows for fast charging and slow discharging. Most people who own electric cars want more power and want it quick while getting the same acceleration as a gas powered vehicle. These super capacitors allow for an electric car to move as a gas powered vehicle. The sponge-like graphene electrodes also exhibit an excellent cycle life. After running through 10,000 charge-discharge cycles, the electrodes retained 90% of their capacity. The researchers are trying to make the graphene thinner to acquire more energy density.

Vocab:
Definition.com

Electrolytes: The ionized or ionizable constituents of a living cell, blood, or other organic matter

Macroporus: Having pores of a size greater than 50 nanometres

Supercapacitor: An Electric double-layer capacitor
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