reply to post by roguetechie
so what are the implications for this?
It's a mixed bag. Currently, there aren't any similar industrial setups to simply merge these types of advances into. ... For example - a lot of
the upgrades in technology have been very linear in terms of manufacturing. Robotic machines can be more accurate and perform more complex tasks -
reducing time, improving reliability, etc - but you can, basically, drop a robotic machine into a shop that used to be primarily operated by hand
presses without having to completely rethink your industry.
In that respect - several things have to come together. First - while the use of Light Scribe burners is interesting and of importance to the
hobbyist; it is hard to envision a cost-effective super-capacitor industry being built around masses of Light Scribe burners. More dedicated laser
lithography devices need to be developed for this purpose and applied to large sheets of graphite oxide before such a scheme would be viable.
The next would be a cost effective packaging. Personally - I see the flexible trait as gimmicky in light of current battery uses. A solid battery
(like the Lithium-Ion in your cell phone) with a very strong dielectric material (as opposed to a flexible one - though that may not be exclusive)
would be far more useful and offer higher nominal voltages with better capacitance. Flexible is cool - but doesn't have much of a market at
In either case - they are going to have to stack hundreds - even thousands of these layers together to create a viable battery-replacing capacitor.
Alternatively - they can bind it to flexible substrates while winding it around a spool (which will be the more likely solution). Both solutions will
provide a functioning capacitor, but may not necessarily be cost-effective. Some serious process engineering will have to go into developing it into
a cost effective solution.
The real implication, for the time being, at least - is that for those who can put forth the time, effort, and a little money (graphite oxide is not
all that expensive) can potentially build some very capable energy storage devices.
It says they can create the graphene electrodes what about other parts of the capacitor?
They are talking a little above their audience, in many regards. Usually, in other capacitors, a metal conductor of some kind must be used to
interconnect the activated carbon used in electrolytic capacitors. That's because activated carbon doesn't have much in terms of conductivity (but
it does have a lot of surface area - more than metal films do). This graphene material, however, is quite conductive - so much so that no other
support materials are required. Basically - a simple metal lead can be connected to the graphene - and the capacitor will work just fine.
Or... so I interpret.
If this technology takes off will it result in super capacitors to run cars and etc?
In a simple word - yes.
Keep in mind - this is still being developed - but one of their top preliminary designs (in terms of power storage) was able to store 276 Farads
at a nominal 4 volts. Roughly speaking - that's about 5 times the energy density of the top Lithium Ion technologies
available. Realistically - it would be reduced to 3 or 4 times by time you incorporated thermal management and other support materials - but that
beats the absolute piss out of everything else out there.
Even if they were to be on a one-for-one with Lithium Ion - or slightly below... the longevity and quick charge/discharge aspects make them ideal for
high power applications (where their 1-3% self-discharge per day is not much of an issue).
There would be some specifics to work out - such as the less than desirable voltage drop-off that comes with capacitor discharge - but that would be
managed with support circuitry that is no more complex or costly than the current circuitry used to manage the very temperamental lithium batteries
currently in use.
So - basically - yes. Give this ten years (... I know - "But it's right there
, Aim!") to make it through the industrial hurdles and the
approval of the three government agencies who have a death-grip on the auto industry... and we'll have practical electric cars.... tentatively.
A better article I found: