Lithium Supply Chains: Brine, Hard Rock, and Recycling

What are the three lithium supply routes?

Lithium reaches the market through brine evaporation (in the Lithium Triangle of Chile, Argentina, and Bolivia), hard rock spodumene mining (primarily in Western Australia and now China and Canada), and battery recycling. Each route has a different cost structure, environmental footprint, and time to market.

Brine operations

Brine operations pump lithium-bearing salt water from underground reservoirs into large evaporation ponds. The process takes months and depends on solar and wind energy. Cost per tonne is generally low once a brine field is in production, but new projects require very long permitting and construction timelines and large land footprints.

Hard rock spodumene

Spodumene is a lithium-bearing mineral mined from hard rock, then concentrated and converted to lithium hydroxide or carbonate at a separate chemical plant (often in China). Hard rock projects can be built faster than brines and respond more quickly to price signals, but unit operating costs are typically higher.

Battery recycling

End-of-life batteries are an emerging source of lithium and other battery metals. Today recycling supplies a small share of demand because there are not yet enough end-of-life batteries to recycle. Over time recycling becomes more important as the installed EV base ages.

Implications for investors

Different supply routes have different risk profiles. Brine projects are typically slow, capital-intensive, and exposed to local water and permitting politics. Hard rock projects are more responsive but higher cost. Recycling is small now but a meaningful long-term source. Diversified exposure across routes spreads route-specific risk.