Feeds

Boffins hose down fiery Li-ion batteries with industrial lubricant

Non-flammable electrolyte found hiding in plain sight

Build a business case: developing custom apps

As Boeing and Tesla both know, if you mistreat a lithium-ion battery, it can start a fire – which puts a premium on the search for non-flammable components. Now, US researchers say they've found a candidate electrolyte in an unexpected place.

When they're overcharged or overheated, the electrolyte in lithium-ion batteries can burn. However, it's hard to find a non-flammable electrolyte that doesn't degrade battery performance.

As the University of North Carolina at Chapel Hill explains, the chemical, perfluoropolyether, is already known to the world as a coating to stop marine life sticking to the bottom of ships.

They're proposing using perfluoropolyether (or PFPE) as a replacement electrolyte because it's both non-flammable and has good ion transport properties, the university says.

Also familiar as an industrial lubricant, PFPE came to the attention of a UNC chemist, Joseph DeSimone, who noticed that it has a “chemical structure to a polymeric electrolyte commonly studied for lithium-ion batteries” (from their abstract in PNAS, that electrolyte is alkyl carbonate). When his group also found that lithium salts could be dissolved in PFPE, and it remained non-flammable, “that's when we decided to roll with it”.

The PFPE electrolytes up to 200°C, the researchers say, have good electrolytic properties when coupled with the right electrodes (LBNL's Nitash Balsara worked on electrodes for this paper), and have a good cycling lifetime. ®

Secure remote control for conventional and virtual desktops

More from The Register

next story
Gigantic toothless 'DRAGONS' dominated Earth's early skies
Gummy pterosaurs outlived toothy competitors
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
CRR-CRRRK, beep, beep: Mars space truck backs out of slippery sand trap
Curiosity finds new drilling target after course correction
'Leccy racer whacks petrols in Oz race
ELMOFO rakes in two wins in sanctioned race
Astronomers scramble for obs on new comet
Amateur gets fifth confirmed discovery
Boffins build CYBORG-MOTHRA but not for evil: For search & rescue
This tiny bio-bot will chew through your clothes then save your life
Vulture 2 takes a battering in 100km/h test run
Still in one piece, but we're going to need MORE POWER
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
prev story

Whitepapers

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 10 endpoint backup mistakes
Avoid the ten endpoint backup mistakes to ensure that your critical corporate data is protected and end user productivity is improved.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Rethinking backup and recovery in the modern data center
Combining intelligence, operational analytics, and automation to enable efficient, data-driven IT organizations using the HP ABR approach.
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.