Update
6 Apr 2022

Form Energy
Form Energy are a US start-up developing an Fe-air battery for long-duration stationary energy storage applications.
Included are:
14 Mar 2022

Alternative Batteries to Play a Key Role for Stationary Storage
Announcements of developments to alternative, next-generation, non-lithium battery chemistries, including redox flow, metal-air, or sodium-ion batteries, are now a regular occurrence. Despite interest in these alternatives, Li-ion batteries remain the dominant choice for consumer devices, electric vehicles, and stationary storage. However, the importance of non-lithium battery chemistries is expected to grow considerably over the next 10 years, especially in the stationary energy storage sector. By 2025, IDTechEx forecast that >10% of the stationary market will be accounted for by non-lithium chemistries, up from <5% in 2021.
External press release
16 Nov 2021

Long-Duration Energy Storage Council Formed to Achieve Net-Zero
ESS Tech Inc, a manufacturer of long-duration iron flow batteries for utility-scale and commercial energy storage applications, announces its participation in the Long-Duration Energy Storage Council launched at COP26.
Background
2 Dec 2020

Form Energy
Form Energy is an American company, which developed an aqueous-air battery. The battery chemistry has not been publicly disclosed.
The company concluded a Series C funding in November 2020 of US$76, among the the investors Bill Gates' Breakthrough Energy Ventures, totalising more than $120m in two years.
Included are: