Mesa-based graphite processing company Urbix Inc. says it's closer to establishing a $280 million production facility now that it has signed a joint development agreement with South Korea-based global electric vehicle battery maker SK On (SKO) Co. Ltd. to develop materials for advanced lithium-ion batteries. Under the deal, Urbix will work with SKO on industrialized anode materials that will supply the battery maker's American gigafactories. Urbix was founded in 2014 and describes itself...