Harness the Hemp

August 13, 2014

newz039-bunch-of-weed-hoardersThe more the work, the better the result, as even the waste off marijuana, or ‘hemp,’ can produce more than a high — how about a energy boost?
Via the BBC:

They “cooked” cannabis bark into carbon nanosheets and built supercapacitors “on a par with or better than graphene” – the industry gold standard.
Electric cars and power tools could harness this hemp technology, the US researchers say.

Energy storage is a big deal — rechargeable batteries burn out, but certain hemp fibers can hold as much power as graphene.

(Illustration found here).

More from Phys.org:

David Mitlin, Ph.D., explains that supercapacitors are energy storage devices that have huge potential to transform the way future electronics are powered.
Unlike today’s rechargeable batteries, which sip up energy over several hours, supercapacitors can charge and discharge within seconds.
But they normally can’t store nearly as much energy as batteries, an important property known as energy density.
One approach researchers are taking to boost supercapacitors’ energy density is to design better electrodes.
Mitlin’s team has figured out how to make them from certain hemp fibers—and they can hold as much energy as the current top contender: graphene.
“Our device’s electrochemical performance is on par with or better than graphene-based devices,” Mitlin says.
“The key advantage is that our electrodes are made from biowaste using a simple process, and therefore, are much cheaper than graphene.”

Mitlin’s group decided to see if they could make graphene-like carbons from hemp bast fibers.
The fibers come from the inner bark of the plant and often are discarded from Canada’s fast-growing industries that use hemp for clothing, construction materials and other products.
The U.S. could soon become another supplier of bast.
It now allows limited cultivation of hemp, which unlike its close cousin, does not induce highs.
Scientists had long suspected there was more value to the hemp bast—it was just a matter of finding the right way to process the material.
“We’ve pretty much figured out the secret sauce of it,” says Mitlin, who’s now with Clarkson University in New York.
“The trick is to really understand the structure of a starter material and to tune how it’s processed to give you what would rightfully be called amazing properties.”

Smoked, or boiled — both have ‘amazing properties.’

Source: HempHelps.
 

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