Mercuria, an energy and commodity group, completed the acquisition of a minority stake in Natron Energy, a manufacturer of sodium-ion batteries. Financial terms were not disclosed. “Mercuria’s investment bolsters Natron’s expansion into oil and gas and alternative energy markets and advances carbon reduction initiatives in the oilfield and elsewhere. This is the third such investment in Natron in the last four months, consistent with market enthusiasm for our technology. Mercuria’s investment will accelerate our plans for the world’s first mass production of sodium-ion batteries," Colin Wessells, Natron Co-Founder and CEO.