New chemistry proposed for low cost flow battery.

https://www.seeker.com/new-batteries-could-last-a-decade-with-minimal-upkeep-2261389684.html

The technology is good," said Shriram Santhanagopalan, a senior engineer at the Advanced Vehicles Group of the National Renewable Energy Laboratory. He said he has been following Aziz's work for some time. However, it's "three to four times the size of a traditional lithium-ion battery size for the same amount of energy. It's just going to be a huge battery the size of your garage [rather] than your car."

It might be a year or two before the battery is ready for commercial testing, Aziz said. His team is still refining the ion membrane and tweaking the viologen and ferrocene molecules.

This research is the fourth in a series of papers published by SEAS on flow battery technology. "I can't really say this particular publication is groundbreaking," Aziz said. But of the whole body of research: "I think just about anyone would say this is groundbreaking."