A new study from Stanford says that sodium-ion batteries will need more breakthroughs in order to compete with lithium-ion (Li-ion).

Peak Energy, a startup claiming to be the ‘first American venture to advance globally proven sodium-ion battery systems,’ has raised US$55 million in a Series A funding round.

Here’s news in brief from around the world in energy storage with liquid metal battery maker Ambri, a German government-funded sodium-ion initiative, and ESS Inc’s iron flow battery project at Amsterdam.

Sodium-ion battery technology could be the “perfect solution for applications where energy density is not paramount,” according to the chief executive of battery tech company BMZ Group.