The miner expects to invest 525 million euros in the Centenario deposit with the aim of producing 24,000 tonnes of lithium carbonate equivalent per year.
Global copper mine production will see steady growth over the next few years, supported by markets with low operating costs and improving copper prices.
GDP growth in the DRC is expected to fall to 4.3% this year from 5.8% in 2018, due to a slowdown in mining activity triggered mainly by lower cobalt prices.
No value was put on the agreement but the Chinese company will also have the right to purchase 3,000 tonnes of rare earth products from the project within three years of production.