They are working on an Iron Silicon battery technology: https://www.mdpi.com/490344 https://www.mdpi.com/490344 It doesn't quite stack up, but it's promising

They are working on an Iron Silicon battery technology: https://www.mdpi.com/490344 https://www.mdpi.com/490344 It doesn't quite stack up, but it's promising and the raw materials are two of the most abundant. So there's that.