A short bit of video that’s really light on technical information but is hopefully of interest anyway.

Super!

If that realises it’s promise it would be a game changer, a big game changer across a lot of industries.

I knew someone would say game changer – I was thinking of saying it but refrained

we’ll see what happens to this battery, they all seem to stall before they get anywhere

Best information I could find on this:
http://physicsworld.com/cws/article/news/2012/mar/20/laser-writer-makes-graphene-supercapacitors

Couldn’t find anything after 2012.

wookiemeister said:

I knew someone would say game changer – I was thinking of saying it but refrained

we’ll see what happens to this battery, they all seem to stall before they get anywhere

That’s because Big Battery buys them out and closes them down.

The unofficial official graphene page seems to be here

“Graphene’s Hall conductivity is \sigma_{xy}=\pm {4\cdot\left(N + 1/2 \right)e^2}/h , where N is the Landau level and the double valley and double spin degeneracies give the factor of 4”

Phoaw, I hope Zarky never sees that.

Peak Warming Man said:

“Graphene’s Hall conductivity is \sigma_{xy}=\pm {4\cdot\left(N + 1/2 \right)e^2}/h , where N is the Landau level and the double valley and double spin degeneracies give the factor of 4”

Phoaw, I hope Zarky never sees that.

How is Zarky these days?

bob(from black rock) said:

Peak Warming Man said:

“Graphene’s Hall conductivity is \sigma_{xy}=\pm {4\cdot\left(N + 1/2 \right)e^2}/h , where N is the Landau level and the double valley and double spin degeneracies give the factor of 4”

Phoaw, I hope Zarky never sees that.

How is Zarky these days?

And Zardoz too for that matter?

Spiny Norman said:

A short bit of video that’s really light on technical information but is hopefully of interest anyway.

Super!

More on the methods and results at this link . All five curves in the upper right of the graph are for graphene (LSG-EC), the only difference being the electrolyte. We’re getting up to 20 Watts per cubic centimetre at 10^-3 Watt hours per cubic centimetre.

How does this compare with other supercapacitors (and ultracapacitors)? It’s more normal to use kg instead of cubic centimetres for supercapacitors. eg.

20 Watts per cubic centimetre would be roughly 10 kW/kg and 10^-3 Watt hours per cubic centimetre would be roughly 0.5 Wh/kg. That’s an OK result for kW/kg but is actually quite low for Wh/kg, supercapacitors tend to have about 200 Wh/kg.