Feeds

Dying to make greener batteries

Plant molecule a replacement for cobalt

SANS - Survey on application security programs

A common and ancient plant dye could replace cobalt and help deliver greener lithium-ion batteries, according to a study out of America.

Purpurin, an extract of the common Madder plant, turns out to have the right characteristics to use as a cathode, according to research led by The City College of New York (along with Rice University and the US Army Research Laboratory).

In a paper in Nature (abstract here), the researchers observe “reversible lithium ion storage properties of a naturally occurring and abundant organic compound purpurin, which is non-toxic and derived from the plant madder.”

More simply, purpurin’s molecule has aromatic rings with carbonyl and hydroxyl groups that can perform the cathode’s task of passing electrons around – meaning that it can serve in the place of cobalt in the lithium battery.

According to Phys.org, it’s easy to process as well: the purpurin is dissolved in alcohol, and lithium salts are added, allowing the lithium ions to bind with the purpurin - at room temperature.

The researchers say getting rid of cobalt would have a bunch of green benefits: it would remove a toxin from the batteries, and remove the high-temperature processing required to combine cobalt ions with lithium to make the batteries.

Li-ion batteries are also energy-hungry to recycle, according to Rice University’s Dr Leela Reddy, with the result that the fabrication and recycling of batteries costs 72 kilos of CO2 per kilowatt-hour of battery energy.

The study suggests purpurin could either be extracted from farmed madden, or the molecule synthesized. ®

3 Big data security analytics techniques

More from The Register

next story
Most Americans doubt Big Bang, not too sure about evolution, climate change – survey
Science no match for religion, politics, business interests
KILLER SPONGES menacing California coastline
Surfers are safe, crustaceans less so
Discovery time for 200m WONDER MATERIALS shaved from 4 MILLENNIA... to 4 years
Alloy, Alloy: Boffins in speed-classification breakthrough
LOHAN and the amazing technicolor spaceplane
Our Vulture 2 livery is wrapped, and it's les noix du mutt
Liftoff! SpaceX Falcon 9 lifts Dragon on third resupply mission to ISS
SpaceX snaps smartly into one-second launch window
STEALTHY NANOROBOTS dress up as viruses, prepare to sneak into YOUR BODY
Cloaking techniques nicked from viruses tackle roadblocks on way to medical frontier
Elon Musk's LEAKY THRUSTER gas stalls Space Station supply run
Helium seeps from Falcon 9 first stage, delays new legs for NASA robonaut
prev story

Whitepapers

Mobile application security study
Download this report to see the alarming realities regarding the sheer number of applications vulnerable to attack, as well as the most common and easily addressable vulnerability errors.
3 Big data security analytics techniques
Applying these Big Data security analytics techniques can help you make your business safer by detecting attacks early, before significant damage is done.
The benefits of software based PBX
Why you should break free from your proprietary PBX and how to leverage your existing server hardware.
Securing web applications made simple and scalable
In this whitepaper learn how automated security testing can provide a simple and scalable way to protect your web applications.
Combat fraud and increase customer satisfaction
Based on their experience using HP ArcSight Enterprise Security Manager for IT security operations, Finansbank moved to HP ArcSight ESM for fraud management.