Dump trucks transport nickel slag at a nickel processing plant operated by PT Vale Indonesia in Sorowako, South Sulawesi, Indonesia. Photo by MAST IRHAM / EPA

June 30 (Asia Today) -- South Korean battery materials producer EcoPro Group is expanding its investment in an Indonesian nickel smelter to more than double its access to the critical mineral used in electric vehicle batteries.

EcoPro and its subsidiary EcoPro BM plan to increase their combined stake in the Bahodopi Nickel Smelting Indonesia project to 39%, becoming major shareholders and taking a leading role in its development. The smelter is under construction at the International Green Industrial Park on the Indonesian island of Sulawesi.

The total investment is estimated at about 1.5 trillion won, or $967 million, based on an exchange rate of 1,550.77 won per dollar.

EcoPro completed the first phase of its Indonesian investment over the past four years, securing rights to about 29,000 metric tons of nickel. Once the second phase is completed, the group expects its total nickel supply rights to reach about 65,000 metric tons.