 Sigma Lithium Corp TSX-V:SGML, OTCQB:SGMLF, NASDAQ:SGML has hailed positive results from a study that looked at potentially tripling the production of battery-grade sustainable lithium concentrate from its Grota do Cirilo project currently being built in Brazill. The study results came as the company also revealed it has struck a deal for up to US100 million of pre-export debt financing. 