Feeds

Boffins use DVD burner to scale graphene supercapacitors

LightScribe becomes capacitor creator

5 things you didn’t know about cloud backup

One of the challenges in shrinking electronics is that some parts, like capacitors, stubbornly resist being minaturised. The charge-carrying capacity of a conventional capacitor is, after all, partly a function of the surface area of its plates.

Graphene is known to have properties that make it attractive as a “supercapacitor”, but it’s difficult to work with – a challenge the UCLA researchers claim to have cracked with a humble DVD burner.

Richard Kaner of the university’s NanoSystems Institute, working with graduate student Maher El-Kady, say they’ve used the DVD burner to fabricate supercapacitors made from a layer of graphitic carbon one atom thick. The big deal, they say, is the simplicity of manufacture, which would make their micro-supercapacitors manufacturing-ready.

The “consumer-grade” LightScribe DVD burner they used was able to build more than 100 of the supercapacitors on one DVD “in less than 30 minutes”.

UCLA DVD-printed supercapacitors

Burn, baby: UCLA's DVD-printed supercapacitors

Instead of trying to stack the graphene electrodes, the researchers printed them with an interleaved pattern, which maximised the surface area the electrodes present to each other (hence increasing the charge-carrying capacity).

The manufacturing technique, described here, is simple: a layer of plastic was glued onto the DVD, and coated with a layer of graphite oxide. The burner’s laser then creates the patterns that become the capacitor.

The researchers discuss the technique in the video below. ®

Build a business case: developing custom apps

More from The Register

next story
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
TRIANGULAR orbits will help Rosetta to get up close with Comet 67P
Probe will be just 10km from Space Duck in October
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
ANU boffins demo 'tractor beam' in water
The current state of the art, apparently
China to test recoverable moon orbiter
I'll have some rocks and a moon cheese pizza please, home delivery
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
Why your mum was WRONG about whiffy tattooed people
They're a future source of RENEWABLE ENERGY
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.