Just returned from some battery testing at the Advanced Photon Source near Chicago. Here Snehal models one of the new batteries we’ve developed for grid-scale electrical storage.

And here’s a couple of them sitting in the path of an X-ray “white beam” that will give us diffraction data while they cycle. This way you can track the mechanism of what’s happening during battery cycling … since the cycling is ultimately an electrochemical transformation.

Now we’re going through a full set of data, getting to the bottom of our underlying mechanisms. By the way it snowed quite a bit while we were there. Here’s the lovely winter view from the guest house.