As the year rapidly draws to a close, we bring you some of the top interview feature articles from 2022 for some light holiday reading.

Austin-based potassium-ion battery startup Group1 says its technology has comparable energy density to lithium iron phosphate (LFP), and that it is aiming for a large-scale launch of its product by 2027.

Startup Group1 is seeking to commercialise cathode materials for potassium-ion batteries, a world-first, while Northvolt is seeking to build batteries using a tree-derived carbon material lignin.