New Lithium Sulfur design with solid electrolyte.

http://www.scientificamerican.com/article.cfm?id=breakthrough-energy-dense-battery-uses-lithium-and-sulfur

Advertisements

4 responses to “New Lithium Sulfur design with solid electrolyte.

  1. Hi Hal . . .

    I found your blog via the above quoted Scientific American web article. I’m not sure if you are aware that there a number of entities currently working on lithium sulfur secondary (ie: rechargeable) cells. ORNL certainly has something to brag about, but a consortium at the University of Arizona in Tucson has also been working hard in this endeavor . . .

    http://uanews.org/story/better-batteries-from-waste-sulfur

    Also, a British concern, Oxis Energy, appears to on the verge of supplying a commercial lithium sulfur cell . . .

    http://www.oxisenergy.com/

    There’s a lot to like with lithium sulfur . . . extraordinary energy density and it’s constructed with materials that are cheap/plentiful. If it can be done in larger scale with the solid electrolyte (ORNL’s ace in the hole,) this will mean not having an expensive/complex/heavy thermal management system to prevent thermal runaway. This is a necessity in automotive applications with current lithium ion cells.

    What everyone involved with lithium sulfur research seems to be working on at the moment is the number of charge cycles the cells can take. Until recently, it was only 5 or 10 times before the battery was ready for the trash heap (OK . . . recycle heap.) But this is what everyone above has now seemed to move beyond. We’re now hearing about 500 or more charge cycles without cell degradation. If they can get it up to a repeatable 2000 charge cycles under a variety of temperature extremes, they’ll have a commercially viable product that will allow the the retirement of now-current lithium ion technology.

  2. thanks for the links Benjamin. Great stuff.

  3. Dwane Anderson

    I don’t know if anyone here can answer this, but I’m going to ask anyway. The article says that the LiS cell produces 1200 mAh/g. It says this is about 4x the density of Li-ion. But the Envia cell holds the record for Li-ion energy density with 400 wh/kg. Now, being that watts = volts x amps, and Li-ion cells are around 4v, that would mean the Envia is only about 100 Ah/kg. And Ah/kg = mAh/g, right? That would give the LiS cell 12x the energy density of the best Li-ion! Did I screw up my math, or did somebody else?

  4. Christian Plau

    There are a few reports in the literature describing novel Li/S cells with silicon-based anodes. I am wondering whether this could be combined even with a solid electrolyte…
    Russian Journal of Electrochemistry, http://dx.doi.org/10.1134/S102319351306013X
    DOI: 10.1134/S102319351306013X

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s