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IPFS News Link • Science, Medicine and Technology

Making graphene supercapacitors with a DVD writer

•, ChemistryWorldUK
 Supercapacitors store charge in electrochemical double layers whereas batteries store charge through electrochemical reactions. Although supercapacitors can charge and discharge much faster than batteries, they are still limited by low energy densities and slow rate capabilities. Researchers at UCLA have successfully used an inexpensive precursor (graphite oxide) to produce high-performance graphene-based supercapacitors using a computerized LightScribe DVD drive. These devices exhibit ultrahigh energy density values in different electrolytes approaching those of batteries, yet they can be charged in seconds. The devices can be charged and discharged for more than 10,000 cycles without losing much in performance compared with a normal life-time of less than 1000 cycles typical for batteries.

1 Comments in Response to

Comment by Ed Price
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Can't wait until there is a method to print graphene supercapacitors on transparencies with my inkjet or laser printer.