From wikipedia:
After three decades of development, NIBs are at a critical moment of commercialization. Several companies such as HiNa and CATL in China, Faradion in the United Kingdom, Tiamat in France, Northvolt in Sweden,[5] and Natron Energy in the US, are close to achieving the commercialization of NIBs, with the aim of employing sodium layered transition metal oxides (NaxTMO2), Prussian white (a Prussian blue analogue[6]) or vanadium phosphate as cathode materials.[7]
See also other types:
https://www.abc.net.au/news/science/2023-02-02/vanadium-redox-flow-battery-and-future-of-grid-energy-storage/101911604
https://www.wesa.fm/environment-energy/2024-02-19/weirton-form-energy-battery-manufacturing
grid backup battery tech is arriving
