Amazing graphene super capacitor!

[Pirate88179]

What was that Scotch Tape method of producing graphite oxide?  They said something like it only produces small amounts.......?  Could this method be scaled up or improved upon?  I have no idea how it might work to produce even a very small amount.

Bill

Possible source for graphene oxide:

&shopp_catfilters[Graphene%20Powder%20or%20Graphene%20Oxide]=Graphene+Oxide&gclid=CO-A6sqfwbUCFQ6ynQodpDAAnw]http://www.angstronmaterials.com/shop/category/all-graphene-products/?shopp_catfilters[Graphene%20Powder%20or%20Graphene%20Oxide]&shopp_catfilters[Graphene%20Powder%20or%20Graphene%20Oxide]=Graphene+Oxide&gclid=CO-A6sqfwbUCFQ6ynQodpDAAnw

[Pirate88179]

http://www.angstronmaterials.com/shop/n002-ps/

Wow! $775.00 (US) for 5 grams of graphene oxide solution.  I need to learn how to make this stuff.

Bill

[TechStuf]

http://en.wikipedia.org/wiki/Graphene

http://www.youtube.com/watch?v=_oEFwyoWKXo

One could give the 'drawing' method or the thermal reduction method via lightscribe DVD drive a go...


TS


P.S. It may be noted that Graphene is also one of the strongest materials known at this time....

http://www.youtube.com/watch?v=we3kWMkSGtg

So, one can imagine the kinds of uses for such a strong (in more ways than one) 'battery' as this.  The car of the future may use it's body as the battery, and simply pulling forward in order to touch a couple contacts for a couple minutes  could give one a few hundred miles of range.  Aircraft skins obtain appreciable positive charges in flight.  Imagine a craft whose skin charges itself simply by the act of flying through the atmosphere, or by targeted laser conduit channel.

[Qwert]

Here is presented the Scotch Tape method
http://physicsworld.com/cws/article/multimedia/2011/sep/29/how-to-make-graphene

[gravityblock]

Dvd lasers use a wavelength of 650 nm (red light), which is equivalent to 1.9 eV (electron volts).  This is extremely important, because it is 0.2 eV above what is required to break the bonds of the fullerenes cage when atomic hydrogen is externally bonded to the cage.  The energy needed to break one bond is larger than the energy to break two adjacent bonds.  The energy barrier to propagate the fracture decreases at successive steps. As a matter of fact, it may be reasonable to assume that the energy released following the initial step may activate the zipperlike cleavage at the crease without further energy investment. Once cleavage is initiated, the unzipping process transforms the stressed crease into two overlapping graphene edges in an exothermic reaction.

Graphite oxide is a compound of carbon, oxygen, and hydrogen.  Molecular hydrogen (H₂) does not dissociate on planar graphene, but does so with an energy gain on fullerenes, with the dissociated hydrogen pair preferentially binding on top of adjacent carbon atoms.  The dissociated hydrogen pair binding externally to the cage of the fullerenes helps to release stress.  Following an initial energy investment of 1.7 eV (red light from a DVD laser), the bonds of the cage break abruptly, leaving two overlapping graphene edges. There is a net energy gain of ~2 eV associated with the bond breaking, caused by releasing the accumulated stress.  The net energy gain of ~2 eV plus the initial energy investment of 1.7 eV is 3.7 eV, which is 0.2 eV above the white led (3.5 eV) being lit in the video found in the first post of this thread.  I posted this information in another thread 2 years ago which didn't gain any interest at that time (which is the norm).

Reference Publication: "Hydrogen-induced disintegration of fullerenes and nanotubes".

Gravock