SEMCORP Advanced Materials Group is an industrial company specializing in the manufacture and sale of plastics and paper products, most notably lithium-ion battery separator film. SEMCORP is the largest producer of battery separator film in the world, and is a certified supplier of major global lithium-ion battery makers and electric vehicle manufacturers. SEMCORP also manufactures packaging and printing products. SEMCORP, formally known as Yunnan Energy New Material Co. Ltd., is listed on the Shenzhen Stock Exchange (002812.SZ).