About Lithium

Lithium mining is often criticised for using excessive water and creating drought-like situations in various parts of the world.

Lithium and its compounds are predominantly extracted from hard rock sources and brine deposits. Historically, hard rock sources were mined but since the 1990s, brine deposits have been used to produce lithium on a commercial scale. Most of the existing lithium supply comes from hard rock mineral, spodumene, which is found in Australia and the United States, or is being extracted from brine solutions from salars in South America.

Lithium concentration in brine solutions is increased by solar evaporation in ponds. The evaporation process is a time-consuming one and could take up to one-and-a-half years to concentrate the solution to 6% Li content. Thereafter, the brine solution is used to produce high-value lithium compounds, including lithium chloride, lithium carbonate and lithium hydroxide.

With disruptions in the cobalt supply chain, automobile makers are switching to low-cobalt battery chemistries. Low-cobalt cathodes for lithium batteries are anticipated to utilise lithium hydroxide instead of lithium carbonate as a feedstock. Seawater contains over 0.2 parts per million lithium. Some scientists have proposed electrolysis to recover lithium compounds from seawater, but it is not yet commercially viable.