New material could lead to longer-lasting batteries

Researchers have stabilized the higher-density lithium-air batteries with new material

Researchers have taken a step forward in developing batteries that can store 10 times more energy than existing lithium-ion batteries.

The scientists have been experimenting with a "garnet ceramic" material called LLZO that could hasten the release of batteries based on lithium-air chemistry. Lithium-air batteries have been in development for decades but are considered unstable for practical use.

LLZO could lead to batteries that are safer, denser and more longer-lasting than lithium ion. Researchers tested its properties using electron microscopy at the U.S. Department of Energy's Oak Ridge National Laboratory (ORNL).

Conventional lithium-ion batteries have reached their limits and a new chemistry is needed to advance the state of the art, said Cheng Ma, a post-doctoral associate researcher at ORNL.

"You have to adopt something radically different, and that's the lithium-air battery," Ma said.

Lithium-air batteries are more practical for use in cars and power grids and less so in laptops and mobile devices, because of the chemistry and density levels, Ma said.

LLZO effectively stabilizes the lithium-air battery -- itself is a proof-of-concept technology -- and moves it closer to practical use. Researchers haven't tested LLZO with actual batteries yet, but applied researchers can now take the research and put it to work, Ma said.

The research was published in the Angewandte Chemie journal.

Lithium-ion batteries have electrodes -- a positive cathode and a negative anode -- with electrolytes in between that allow charged lithium ions to move around. During a charge, lithium ions move from the cathode to the anode for storage. The reverse happens during a discharge, with the lithium ions moving from anode to cathode and out to the device using the battery.

Lithium-air batteries are different in that they use an aqueous electrolyte and lithium anode, That provides greater energy density, but the current materials aren't stable, making lithium-air batteries im practical. But LLZO acts as a separator and keeps the battery stable, especially during discharge.

LLZO could be better than any commercial electrolyte for lithium-air batteries, Ma said. It also gives options for scientists to chase new ideas in lithium-air battery designs.

"It gives an option to realize the stable operation of lithium air battery," Ma said.

Agam Shah covers PCs, tablets, servers, chips and semiconductors for IDG News Service. Follow Agam on Twitter at @agamsh. Agam's e-mail address is agam_shah@idg.com

Join the newsletter!

Or

Sign up to gain exclusive access to email subscriptions, event invitations, competitions, giveaways, and much more.

Membership is free, and your security and privacy remain protected. View our privacy policy before signing up.

Error: Please check your email address.

Tags displaysComponentsOak Ridge National Laboratory

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Agam Shah

IDG News Service
Show Comments

Brand Post

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Jack Jeffries

MSI GS75

As the Maserati or BMW of laptops, it would fit perfectly in the hands of a professional needing firepower under the hood, sophistication and class on the surface, and gaming prowess (sports mode if you will) in between.

Taylor Carr

MSI PS63

The MSI PS63 is an amazing laptop and I would definitely consider buying one in the future.

Christopher Low

Brother RJ-4230B

This small mobile printer is exactly what I need for invoicing and other jobs such as sending fellow tradesman details or step-by-step instructions that I can easily print off from my phone or the Web.

Aysha Strobbe

Microsoft Office 365/HP Spectre x360

Microsoft Office continues to make a student’s life that little bit easier by offering reliable, easy to use, time-saving functionality, while continuing to develop new features that further enhance what is already a formidable collection of applications

Michael Hargreaves

Microsoft Office 365/Dell XPS 15 2-in-1

I’d recommend a Dell XPS 15 2-in-1 and the new Windows 10 to anyone who needs to get serious work done (before you kick back on your couch with your favourite Netflix show.)

Maryellen Rose George

Brother PT-P750W

It’s useful for office tasks as well as pragmatic labelling of equipment and storage – just don’t get too excited and label everything in sight!

Featured Content

Product Launch Showcase

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?