I just posted an article this morning too about a slightly different advance in flow battery tech. What's really fascinating about it is that they tweaked the molecular structure of the molecules to keep the properties they wanted, while minimizing those they didn't:
They have developed a new non-toxic and non-corrosive flow battery with a very long lifespan that can store energy in organic molecules dissolved in water. And because the electrolytes are similar to salt water, these batteries should also be much cheaper to produce.
Link: New Battery Tech Could run for over a Decade with Minimal Cost and Maintenance
Nice. Totally different stories but around the same time and about the same tech, sweet.