But as that article also comments, flow battery potential is to do better than that for longer duration storage. Just early days yet on that.
UNSW includes their view on expected near future (2020) vanadium storage systems costs here, and claiming 25,000-100,000 100% cycles. https://newsroom.unsw.edu.au/news/science-tech/power
Then there are various forms of thermal energy storage technology being developed, most common being molten salt, but others including silicon (1414degrees in Aus) also being developed, that suggest they can be ten times cheaper than Li-Ion.
When I make the time to do some searching around on battery tech developments, every month or so, there are so may different research projects and so many different technology improvements being pursued, and so many large and small organisations, research science, government and private, start-up and large entities all actively engaged. We're just at the beginning. https://www.reuters.com/article/us-...oint-venture-for-energy-storage-idUSKBN19W0Z8
All that stuff I mentioned above is a bit past just research and into commercial development work.