Green Car Congress  
Go to GCC Discussions forum About GCC Contact  RSS Subscribe Twitter headlines

« ContiTech acquired e-bike drive manufacturer Benchmark | Main | Ceres initiates field evaluations of its biotech traits in sugarcane; first field trials in S. America »

Print this post

Polypyrrole interlayer for Li-S batteries improves cycling performance

16 June 2014

A team from CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences has designed a novel polypyrrole (an organic polymer) functional interlayer for Li-sulfur batteries to improve cycling performance. The paper is published in the Journal of Power Sources.

1-s2.0-S037877531400740X-fx1
Click to enlarge.

They fabricated a polypyrrole functional interlayer uniformly onto the surface of sulfur cathode to inhibit the dissolution of lithium polysulfides and thus to protect the sulfur cathode. The Li–S battery with the functional inlayer shows an encouraging electrochemical performance.

The initial discharge capacity is 719 mAh g−1 and the capacity retains at 846 mAh g−1 even after 200 cycles at 0.2C with an average coulombic efficiency of 94.2%. Moreover, the discharge capacities are 703 mAh g−1 and 533 mAh g−1 at 1C and 2C respectively even after 300 cycles.

Resources

  • Guoqiang Ma, Zhaoyin Wen, Jun Jin, Meifen Wu, Xiangwei Wu, Jingchao Zhang (2014) “Enhanced cycle performance of Li–S battery with a polypyrrole functional interlayer,” Journal of Power Sources Vol. 267:542–546, doi: 10.1016/j.jpowsour.2014.05.057

June 16, 2014 in Brief | Permalink | Comments (3) | TrackBack (0)

TrackBack

TrackBack URL for this entry:
http://www.typepad.com/services/trackback/6a00d8341c4fbe53ef01a73dd97bf7970d

Listed below are links to weblogs that reference Polypyrrole interlayer for Li-S batteries improves cycling performance:

Comments

This could lead to a 400+ Wh/Kg commercial lithium battery for future extended range EVs?

Actually, this may be closer to 500Wh/kg, but we have to make some guesses about the nominal operating voltage and a few other items.
I wonder what kind of temperature range it could operate in and the cost for manufacturing something like this.

Electro chemists have been using polypyrrole for a long time, it is an electrically conductive polymer. Some polymers transfer ions and some transfer electrons, this is a natural step in the evolution of lithium sulfur.

Verify your Comment

Previewing your Comment

This is only a preview. Your comment has not yet been posted.

Working...
Your comment could not be posted. Error type:
Your comment has been posted. Post another comment

The letters and numbers you entered did not match the image. Please try again.

As a final step before posting your comment, enter the letters and numbers you see in the image below. This prevents automated programs from posting comments.

Having trouble reading this image? View an alternate.

Working...

Post a comment

Green Car Congress © 2013 BioAge Group, LLC. All Rights Reserved. | Home | BioAge Group