Pop the hood on an electric vehicle and you won't find an engine, but you will find a map. The pack under the floor of that Chevy Bolt or BMW i4 is a physical record of a supply chain that stretches from salt flats in the Andes to red-dirt mines in central Africa to processing plants along China's coast. Before any of that lithium, cobalt, or manganese becomes a cathode, it has to survive a journey shaped as much by geology as by geopolitics. If you're trying to understand why EV prices swing, why automakers sign multi-year supply deals years in advance, or why "battery security" has become a phrase government officials actually use, the answer starts with where these three materials come out of the ground.
Lithium: Australian Rock and South American Brine
Lithium is abundant in the earth's crust, but only a few places produce it at a scale worth talking about, and they do it in two very different ways. Australia is the world's dominant source of hard-rock lithium, pulled from spodumene ore in open-pit mines concentrated in Western Australia. That ore gets crushed and concentrated on-site, then typically shipped overseas for the chemical conversion that turns it into battery-grade lithium hydroxide or carbonate.
The other major source is the so-called lithium triangle, where the borders of Chile, Argentina, and Bolivia meet across a string of high-altitude salt flats. Here, lithium isn't mined from rock but pumped up as brine from beneath the salar surface, then left to evaporate in massive shallow ponds over many months until the lithium concentration is high enough to process further. Chile has the longest track record of commercial brine production, Argentina has drawn a wave of new investment and project announcements in recent years, and Bolivia holds some of the largest resource estimates in the world but has historically lagged in actually bringing that lithium to market, partly due to technical challenges with its brine chemistry and partly due to policy decisions about how the resource should be developed. China also produces a meaningful amount of lithium domestically, both from brine and from hard-rock sources, which feeds directly into its outsized role further down the supply chain.
Cobalt: A Supply Chain Anchored in One Country
If lithium sourcing is split between two regions, cobalt sourcing is dominated by one. The Democratic Republic of Congo supplies the majority of the world's mined cobalt, most of it as a byproduct of copper mining in the country's southeastern Copperbelt region. No other country comes remotely close to that share, which makes cobalt the single most geographically concentrated material in the battery supply chain. Smaller volumes come from Australia, Russia, Canada, and a handful of other countries, but none of them can substitute for Congolese supply at scale.
That concentration is exactly why cobalt draws the most scrutiny of the three materials. A meaningful portion of Congolese cobalt is dug by hand in artisanal and small-scale mining operations that operate alongside the large industrial mines, and this informal sector has been repeatedly linked to unsafe working conditions and child labor. Automakers and battery makers have responded with traceability programs and sourcing audits, and some have publicly committed to reducing cobalt content in their cathode chemistries altogether, shifting toward nickel-heavy or lithium iron phosphate formulations that use little or no cobalt. That shift is real, but it's gradual, and it doesn't change the underlying fact that for now, anyone building a cobalt-containing battery is, in practice, relying on the DRC.
Manganese: The Quiet Material with a More Diverse Map
Manganese gets far less attention than lithium or cobalt, partly because it's cheaper and more plentiful, and partly because it has long been used mainly as a steelmaking ingredient rather than a battery material. Its role in batteries has grown as manufacturers lean on manganese-rich cathode chemistries, including nickel-manganese-cobalt blends and newer lithium-manganese-rich formulations being developed to cut cobalt content further.
The good news on manganese is that its mining footprint is considerably more diversified than cobalt's. South Africa holds a large share of the world's manganese reserves and is a leading producer, and Gabon is another major exporter, with substantial production also coming from Australia. This spread across multiple stable mining jurisdictions means manganese carries less single-country supply risk than cobalt does, even though, as you'll see, the processing story looks a lot more similar across all three materials than the mining story does.
The Refining Bottleneck: Why China Matters More Than the Mines
Here's the detail that surprises people who assume mining is the whole story: where a material is dug up and where it becomes battery-ready chemical product are usually two different countries, and China sits at the center of that second step for all three materials. Australian spodumene is frequently shipped to China for conversion into lithium hydroxide. A significant share of Congolese cobalt is processed through Chinese-owned or Chinese-invested refining capacity, much of it actually located within the DRC itself before further refining abroad. Manganese also passes through Chinese processing on its way into battery-grade sulfate form.
This is the part of the supply chain that policymakers in the United States, the European Union, and elsewhere have grown most anxious about. It's one thing to depend on Australia or Chile for raw ore, since those are allied, market-based economies with long trading relationships with the West. It's another thing entirely to depend on a single country for the mid-stream chemical processing that turns raw materials from anywhere in the world into a form batteries can actually use. That processing dependency, more than the mining geography itself, is the chokepoint that has driven Western governments to fund domestic refining projects, offer tax incentives for battery material processing, and lean on trade rules that reward supply chains routed away from Chinese processing.
Diversification, Recycling, and the Limits of Both
None of this concentration is fixed in stone, and the industry is visibly trying to loosen it. New lithium projects are moving forward in places like Nevada, Quebec, and parts of Europe, though bringing a mine from discovery to production typically takes many years, so this diversification shows up slowly. Cobalt-light and cobalt-free battery chemistries are gaining ground in the market, which reduces exposure to Congolese supply risk even without a single new mine opening elsewhere. Manganese, already more geographically spread out, benefits simply from its cathode role expanding at the same time cobalt's role shrinks.
Recycling is often floated as the eventual fix for all of this, and directionally that's fair: batteries at the end of their life contain recoverable lithium, cobalt, manganese, and nickel, and a growing number of recycling facilities are being built specifically to reclaim them. But it's worth being honest about the limits here too. The global EV fleet is still young, which means the volume of batteries actually reaching end-of-life and entering recycling streams today is modest relative to the flood of new batteries being manufactured. Recycling will matter more with each passing decade as the installed base ages, but it isn't going to meaningfully offset primary mining and refining demand in the near term. For now, the map of salt flats, copper belts, and Chinese processing plants remains the map that actually determines how batteries get built.
Key Takeaways
- Lithium comes mainly from Australian hard-rock mining and brine operations across Chile, Argentina, and Bolivia's lithium triangle, with Bolivia's large resources still underdeveloped relative to its neighbors.
- Cobalt supply is dominated by the Democratic Republic of Congo, making it the most geographically concentrated and ethically scrutinized material in the battery chain.
- Manganese sourcing is comparatively diversified, led by South Africa, Gabon, and Australia, which makes it a lower supply-risk material even as its use in cathodes grows.
- Regardless of where materials are mined, a large share of the chemical processing that turns them into battery-grade inputs happens in China, which is the real chokepoint policymakers worry about.
- Automakers are responding through cobalt-light cathode chemistries, new mining and refining projects outside China, and early-stage recycling infrastructure, though all three remain gradual fixes rather than quick ones.
- Bottom line: if you want to understand EV supply risk, watch the refining map as closely as the mining map, since processing concentration matters just as much as where the raw ore comes out of the ground.
