Connect with us

Hi, what are you looking for?

CleanTechnica
As their name suggests, lithium-air batteries are much lighter than their lithium-ion counterparts, giving them vast potential for use in electric vehicles and portable devices. There's a big catch, though. Commercial development of rechargeable lithium-air batteries has stalled partly over the presence of moisture in air, which reacts violently with lithium. Now a team of scientists

Clean Transport

Ordinary Pencil Offers Solution for Elusive Lithium-Air Battery

As their name suggests, lithium-air batteries are much lighter than their lithium-ion counterparts, giving them vast potential for use in electric vehicles and portable devices. There’s a big catch, though. Commercial development of rechargeable lithium-air batteries has stalled partly over the presence of moisture in air, which reacts violently with lithium. Now a team of scientists

researchers make lithium-air battery with graphite pencilAs their name suggests, lithium-air batteries are much lighter than their lithium-ion counterparts, giving them vast potential for use in electric vehicles and portable devices. There’s a big catch, though. Commercial development of rechargeable lithium-air batteries has stalled partly over the presence of moisture in air, which reacts violently with lithium. Now a team of scientists from the National Institute of Advanced Industrial Science and Technology in Japan has come up with a solution, in which an ordinary graphite pencil plays a key role.

Pencils and Lithium-Air Batteries

As described by Harriet Brewerton of the Royal Chemistry Society, the team layered an organic electrolyte around the lithium, then capped it with a ceramic seal that keeps moisture out while doubling as a solid-state electrolyte. A two-dimensional cathode can then be drawn on the ceramic with a graphite pencil. The desired reaction occurs when lithium ions in the  electrolyte solution pass through the ceramic. They combine with oxygen in the air, within the area covered by graphite from the pencil. The cathode can be removed and redrawn multiple times.

More Hurdles for Lithium-Air Batteries

In addition to the moisture problem, lithium-air technology still has to overcome efficiency and longevity problems. Last year, researchers at MIT took a big step toward resolving one issue by developing a new high efficiency catalyst for a lithium-air battery, made of a gold-silver alloy.  According to writer Kevin Bullis, the magic number is 85 to 90 percent efficiency for commercial batteries. The MIT team improved on the previous high of 70 percent, reaching  77 percent. There’s still a long way to go, but a good two years ago IBM began looking into lithium-air technology for stationary grid use as well as in electric vehicles, which is one indicator that technical obstacles to a commercial grade lithium air-battery can be overcome sooner rather than later.

Image: Pencils by fde comite on flickr.com.


Appreciate CleanTechnica’s originality? Consider becoming a CleanTechnica Member, Supporter, Technician, or Ambassador — or a patron on Patreon.
 
 
Have a tip for CleanTechnica, want to advertise, or want to suggest a guest for our CleanTech Talk podcast? Contact us here.
Written By

Tina specializes in military and corporate sustainability, advanced technology, emerging materials, biofuels, and water and wastewater issues. Tina’s articles are reposted frequently on Reuters, Scientific American, and many other sites. Views expressed are her own. Follow her on Twitter @TinaMCasey and Google+.

Comments

#1 most loved electric vehicle, solar energy, and battery news & analysis site in the world.

 

Support our work today!

Advertisement

Power CleanTechnica: $3/Month

Tesla News Solar News EV News Data Reports

Advertisement

EV Sales Charts, Graphs, & Stats

Advertisement

Our Electric Car Driver Report

30 Electric Car Benefits

Tesla Model 3 Video

Renewable Energy 101 In Depth

solar power facts

Tesla News

EV Reviews

Home Efficiency

You May Also Like

Energy Efficiency

Metrus Energy* has announced a new $2.2 million Sustainable Energy Services Agreement (SESA) with IBM. This is the first project in a planned portfolio...

Autonomous Vehicles

This article is on some interesting things that Adam Jonas has said recently on Tesla and legacy auto. We have written a lot about...

Batteries

US researchers spark new electric vehicle battery battle with breakthrough on reversible lithium metal energy storage technology.

Batteries

In Tesla's 2020 shareholder meeting, one shareholder proposal would have required the company to investigate the poor treatment of cobalt miners in the Democratic...

Copyright © 2021 CleanTechnica. The content produced by this site is for entertainment purposes only. Opinions and comments published on this site may not be sanctioned by and do not necessarily represent the views of CleanTechnica, its owners, sponsors, affiliates, or subsidiaries.