The actual story buried at the end of a Sino #1 article-

In the United States, companies like Oregon-based ESS Tech Inc. are already deploying iron flow systems for tech giants like Google.

However, some of these existing designs could struggle with “dendrites” — tiny, needle-like crystals that can short-circuit the battery. The Chinese team believes they have leapfrogged these hurdles by using an alkaline-based chemistry and their new molecular “shield.”