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Super Batteries? Hybrid Ribbons a Gift for Powerful Batteries



March 25, 2013 – Comments (4)

Awesome development about using Graphene and VO2 ribbons for batteries. Like the post says below based on the power density and discharge capabilites, this is a cross between a battery and supercapacitor. This is very much related to tdonb's post:


Super Batteries? Hybrid Ribbons a Gift for Powerful Batteries
Mar. 25, 2013

Hybrid ribbons of vanadium oxide (VO2) and graphene may accelerate the development of high-power lithium-ion batteries suitable for electric cars and other demanding applications.

The Rice University lab of materials scientist Pulickel Ajayan determined that the well-studied material is a superior cathode for batteries that could supply both high energy density and significant power density. The research appears online this month in the American Chemical Society journal Nano Letters.

The ribbons created at Rice are thousands of times thinner than a sheet of paper, yet have potential that far outweighs current materials for their ability to charge and discharge very quickly. Cathodes built into half-cells for testing at Rice fully charged and discharged in 20 seconds and retained more than 90 percent of their initial capacity after more than 1,000 cycles.

"This is the direction battery research is going, not only for something with high energy density but also high power density," Ajayan said. "It's somewhere between a battery and a supercapacitor."

The ribbons also have the advantage of using relatively abundant and cheap materials. "This is done through a very simple hydrothermal process, and I think it would be easily scalable to large quantities," he said.

4 Comments – Post Your Own

#1) On March 26, 2013 at 4:02 PM, ChrisGraley (28.51) wrote:

Who needs batteries binve?

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#2) On March 26, 2013 at 4:11 PM, binve (< 20) wrote:

Hey Chris,

I hear you man, Dr. Nocera's artificial leaf is incredibly awsome and incredibly promising. I wrote a post about that one last year:

There have been some other developments by other teams as well:

I am extremely excited by all of these technolgies. But not all of them have the same applications (i.e. a graphene based super capacitor / super battery will have a different application set than say a water splitting system to store hydrogen or use it directly).

There are so many incredible developments happening in parallel and a lot of them are complementary. It makes me very excited and optimistic:

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#3) On March 27, 2013 at 4:57 PM, ChrisGraley (28.51) wrote:

Yes, i's amazing how many different things are being discovered and how fast it is happening.

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#4) On March 27, 2013 at 5:08 PM, tdonb (38.22) wrote:

Has anyone found an effective way to invest in these technologies yet?

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