This article suggests that Hyundai is at loggerheads with LG Chem and may be shifting its battery preference to SK Innovation. It also says that 30% of the Kona EVs made up until July 2020 had batteries from SK Innovation, without saying when that supply might have started.
CATL cells in China: https://www.electrive.com/2019/05/27/china-hyundai-konda-electric-driving-on-catl-batteries/ with an impressive lead in Wh/kg over 2nd place SK and 3rd place LG: https://insideevs.com/news/428511/china-battery-energy-density-280-wh-kg/#:~:text=SK%20Innovation%20cells%3A%20269.44%20Wh,kg%20in%20Tesla%20Model%203 No reports of any recalls with the SK or CATL cell packs
