April 1 (Reuters) - Sigma Lithium ( SGML ) on Monday

made a final investment decision to add a second production line

at its Greentech Industrial Plant in Brazil, aiming to nearly

double lithium output, sending its shares up 6% in morning

trade.

Vancouver, Canada-based Sigma, which mines and processes

lithium in Brazil, plans to increase production to 520,000

tonnes per year by 2025 from the current output of 270,000

tonnes.

The company said the capital expenditure for phase 2 is

expected to be $100 million. It expects to commission the plant

by year-end 2024, with first production expected in the first

quarter of 2025.

The company, which recently underwent management changes and

is pursuing contracts with automakers and major players in the

battery industry, obtained an environmental license from the

state government at the end of January to install and operate

the new plant.