Building Batteries from Plant Roots

Dec-13-12 A new plant-based extract used as a clothing dye for over 3500 years could also provide a green alternative to the metal ores used to make lithium-ion batteries.

The extract, called purpurin, comes from the root of the madder plant. Researchers discovered that purpurin, along with other biologically-based color molecules, contain carbonyl and hydroxyl groups able to pass electrons back and forth in the same way as traditional electrodes. Purpurin can be made and stored at room temperature, with a color change signaling when the binding process is complete. And because it is organic, batteries made from the material would be non-toxic, and could be easily disposed of.

The development team, from the City College of New York, estimates that a green Li-ion battery may be commercially available in only a few years.

Image: John/Vijai

More Info about this Invention:

[GIZMAG.COM]
[CITY COLLEGE OF NEW YORK]

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