Connect with us

Hi, what are you looking for?

Jewish Business News

World News

A battery that ‘breathes’ could power next-gen electric vehicles

123RF

Sales of (EVs) nearly doubled in 2013, but most won’t take you farther than 100 miles on one charge. To boost their range toward a tantalizing 300 miles or more, researchers are reporting new progress on a “breathing” battery that has the potential to one day replace the lithium-ion technology of today’s EVs. They presented their work at the 247th National Meeting & Exposition of the American Chemical Society (ACS), the world’s largest scientific society.

Researchers have gathered here through Thursday to give more than 10, 000 reports on the latest advances in science. The presentations are taking place at the Dallas Convention Center and area hotels.

“Lithium-air batteries are lightweight and deliver a large amount of electric energy, ” said Nobuyuki Imanishi, Ph.D. “Many people expect them to one day be used in electric vehicles.”

The main difference between lithium-ion and lithium-air batteries is that the latter replaces the traditional cathode — a key battery component involved in the flow of electric current — with air. That makes the rechargeable metal-air battery lighter with the potential to pack in more energy than its commercial counterpart.

While lithium-air batteries have been touted as an exciting technology to watch, they still have some kinks that need to be worked out. Researchers are forging ahead on multiple fronts to get the batteries in top form before they debut under the hood.

One of the main components researchers are working on is the batteries’ electrolytes, materials that conduct electricity between the electrodes. There are currently four electrolyte designs, one of which involves water. The advantage of this “aqueous” design over the others is that it protects the lithium from interacting with gases in the atmosphere and enables fast reactions at the air electrode. The downside is that water in direct contact with lithium can damage it.

Seeing the potential of the aqueous version of the lithium-air battery, Imanishi’s team at Mie University in Japan tackled this issue. Adding a protective material to the lithium metal is one approach, but this typically decreases the battery power. So they developed a layered approach, sandwiching a polymer electrolyte with high conductivity and a solid electrolyte in between the lithium electrode and the watery solution. The result was a unit with the potential to pack almost twice the energy storage capacity, as measured in Watt hours per kilogram (Wh/kg), as a lithium-ion battery.

“Our system’s practical energy density is more than 300 Wh/kg, ” Imanishi said. “That’s in contrast to the energy density of a commercial lithium-ion battery, which is far lower, only around 150 Wh/kg.”

The battery showed a lot of promise, with high conductivity of lithium ions, and the ability to discharge and recharge 100 times. In addition to powering EVs, lithium-air batteries could one day have applications in the home, thanks to their low cost. Power output remains a big hurdle, but Imanishi said his group is committed to honing this approach, as well as exploring other options, until lithium-air becomes a commercial reality.

This research was presented at a meeting of the American Chemical Society.

Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

This site uses Akismet to reduce spam. Learn how your comment data is processed.

Newsletter

Advertisement

You May Also Like

World News

In the 15th Nov 2015 edition of Israel’s good news, the highlights include:   ·         A new Israeli treatment brings hope to relapsed leukemia...

empty

The contract signed between the Israeli government and Pfizer shows clearly and unequivocally that this is a clinical study on humans - The agreement...

Travel

After two decades without a rating system in Israel, at the end of 2012 an international tender for hotel rating was published.  Invited to place bids...

Business

Now Platika joins and elite club of $10 billion plus Israeli firms.

Advertisement