*That* would be spectacular.

I love it when someone finds an easily usable solution like this! Cheap, effective and easily scalable exciting stuff!

I wouldn't say capacitors have lagged behind considering super caps today. When I was in college a prof described a 1 farad cap as being about a 6 foot cube.

"graphene micro-supercapacitors"
WOW! That's a mouthful of tech. I love it!

I would like more information on power density of these super capacitors.

the article says: These micro-supercapacitors demonstrate a power density of ~200 W cm−3, which is among the highest values achieved for any supercapacitor. Note that is to the minus three! This could be a big deal.

Edit, Scottingham beat me to it.

After digging into the supplimentary data (graphs and captions mostly), I also found this:

The micro-supercapacitor shows excellent cycling stability; the
capacitance remains unchanged after 30,000 cycles of charge/discharge at a high current density of 1000 mA/cm3

Also of important note -- The various limitations section:

"It is noteworthy that the self-discharge rate of LSG microsupercapacitor is rapid in the initial state. This is possibly because of slow faradaic reactions occurring at imperfections on the surface of the electrode material. LSG has remnant oxygen containing groups from the graphite oxide precursor (hydroxyl, epoxy, carboxylic, etc.) that are plausible reaction sites [21]. Another possibility for the rapid self-discharge in the initial stage could be the separator material, graphite oxide. The chemical and electrical properties of graphite oxide are different from those of the conventional polymer separators used in commercial supercapacitors. Note that all measurements for the LSG micro-supercapacitors were carried out on the unpackaged device, meaning that the actual charge retaining time could be longer. Further optimization of the device architecture and fabrication may result in better charge retention."

So, a one Farad capacitor made with this method would be how big? It would nice if the authors had revealed some quantitive information like voltage limits and/or capacity.

Of course they don't want to make a promise that someone else would have to keep ... yet.

The power density achieved is not so high with compare to other types of graphene supercapacitors published (which are often even cheaper, as they use printed metal electrodes and the paper as a substrate).