Battery storage projects are taking off in the US - the country could triple its utility-scale battery storage power operating capacity by 2023. A US Energy Information Administration (EIA) update says 1,623 MW of new utility-scale battery storage capacity is set to come online by 2023, up from a current total of 899 MW. Total capacity is expected to be around 2.5 GW of utility-scale battery storage by that year. Utility-scale battery storage power capacity more than quadrupled from the end of 2014 (214 MW) through March 2019 (899 MW).
A UK based start-up spun out of the University of Cambridge claims a breakthrough in electric car battery chemistry that can charge in six minutes and that they can commercialize the new battery as soon as 2020. Echion Technologies says it has created a new powder that replaces graphite inside Li-ion battery cells and impressively improves recharge capacity. "The powders are the central component of a lithium battery. This is a new kind of powder." The start-up claims to have a validated prototype and that its new material can easily be incorporated into existing production.
In another possible battery chemistry advance, researchers at Stanford University and SLAC National Accelerator Laboratory have developed a coating that could make a long-held idea, the rechargeable lithium metal battery, a reality. It has long been believed that lithium metal batteries could be far more efficient than lithium ion batteries - unfortunately, they have a tendency to explode due to build-up of what are called "dendrites." The new coating is claimed to prevent short circuit causing dendrites from ever forming.

Sources: AMD, IDN, FT, Reuters, PSB, MPN, B&B, BDN, MCN, AP, Bloomberg, MSNW, Electrek