The Cobalt Supply Chain

The rapid shift toward electric vehicles (EVs) has turned cobalt into one of the most sought-after commodities on the planet. Often called the “blood diamond of batteries,” this blue metal is essential for stabilizing lithium-ion batteries and extending their range. However, the journey cobalt takes from the ground to your driveway is complicated. It involves severe human rights concerns, geopolitical tension, and complex logistics that major automakers are struggling to manage.

The Geography of Supply: The Congo and China

To understand the cobalt supply chain, you have to look at two specific locations: The Democratic Republic of the Congo (DRC) and China. These two nations hold a massive influence over the global battery market.

• Extraction in the DRC: Approximately 70% to 75% of the world’s cobalt is mined in the DRC. No other commodity has such a high concentration of supply in a single country. This creates a bottleneck. If political instability rocks the Congo, the global supply of EV batteries halts.
• Refining in China: While the Congo digs it up, China processes it. Chinese companies control roughly 80% of the world’s cobalt refining capacity. Furthermore, Chinese firms like CMOC Group own substantial stakes in the biggest mines within the DRC, such as the Tenke Fungurume mine.

This geographic concentration makes Western automakers nervous. The U.S. Inflation Reduction Act (IRA) explicitly tries to combat this by offering tax credits only for vehicles with minerals sourced from the U.S. or free-trade partners. This legislation has forced companies like General Motors and Ford to scramble for new supply agreements outside of Chinese influence, though untangling these deep-rooted ties takes years.

The Ethical Crisis: Artisanal Mining

The most pressing issue in the cobalt supply chain is the prevalence of Artisanal and Small-scale Mining (ASM). This isn’t industrial mining with heavy machinery and safety inspectors. ASM involves individuals, often families, digging for ore by hand using basic tools like pickaxes and shovels.

Estimates suggest that 15% to 30% of Congolese cobalt comes from ASM. The conditions are perilous. Miners often work in unstable tunnels without structural support, leading to frequent collapses. They lack protective gear, exposing them to toxic dust that causes severe lung conditions.

Child labor is a documented part of this ecosystem. Reports from organizations like Amnesty International and verified by researchers such as Siddharth Kara point to thousands of children working in these mines to wash and sort ore.

The problem for buyers is contamination. ASM cobalt is often sold to traders who sell it to larger depots. Once it enters the refining process, it is mixed with industrially mined cobalt. By the time the metal reaches a battery factory in Nevada or Berlin, it is nearly impossible to distinguish “clean” industrial cobalt from cobalt mined by children.

Industry Solutions and Traceability

Major brands are aware that their customers do not want unethical products. Consequently, tech giants like Apple and automakers like BMW and Tesla have implemented strict auditing standards.

The Battery Passport

The Global Battery Alliance (GBA) has launched the “Battery Passport” initiative. This is a digital twin of the physical battery. It records the origin of every material inside the cell. The goal is to give regulators and consumers a QR code they can scan to see exactly which mines the materials came from and the carbon footprint associated with them.

Blockchain Tracking

Startups like Circulor are using blockchain technology to create an immutable ledger for minerals. As a bag of ore moves from a mine to a refinery and then to a cathode manufacturer, each step is recorded. If a bag of cobalt appears at a refinery without a verified origin block, the system flags it. Volvo has been a pioneer in using this tech for their EX90 and Polestar lines.

Direct Sourcing

Instead of buying from third-party chemical suppliers, automakers are now signing contracts directly with mining giants like Glencore. Glencore operates the Mutanda mine in the DRC, which is a massive industrial operation. By dealing directly with the mine operator, car companies hope to bypass the open market where artisanal cobalt is mixed in.

The Technological Shift: Moving Away from Cobalt

Because the ethical and logistical headaches are so high, the industry is actively trying to eliminate cobalt entirely. Engineers are changing the chemical recipe of the batteries.

The most successful alternative is the Lithium Iron Phosphate (LFP) battery. LFP batteries contain zero cobalt and zero nickel. They rely on iron and phosphate, which are abundant, cheap, and ethically easier to source.

• Tesla’s Pivot: Tesla has already switched to LFP batteries for its standard-range Model 3 and Model Y vehicles.
• Ford’s Investment: Ford announced a $3.5 billion investment to build an LFP battery plant in Michigan, utilizing technology licensed from Chinese battery giant CATL.

While LFP batteries historically had a shorter range than cobalt-rich Nickel-Manganese-Cobalt (NMC) batteries, the technology has improved enough to be viable for the average consumer. As more manufacturers adopt LFP, the demand pressure on the cobalt supply chain may ease, potentially driving down prices and reducing the reliance on unethical mining practices.

Economic Volatility

The cobalt market is subject to extreme price swings. In 2022, cobalt prices soared due to fears of a shortage. However, by late 2023 and entering 2024, prices crashed. This was due to a combination of expanded production in the DRC and the faster-than-expected adoption of LFP batteries.

This volatility makes it difficult for mining companies to plan long-term investments. When prices crash, mines like Glencore’s Mutanda have occasionally paused production to wait for better market conditions. This stop-start cycle adds another layer of complexity for automakers trying to secure a steady flow of materials for the next decade of EV production.

Frequently Asked Questions

Why is cobalt used in batteries if it is so problematic? Cobalt prevents the battery cathode from overheating and helps maintain the battery’s structure during charging cycles. It effectively acts as a stabilizer, allowing the battery to last for years without degrading or catching fire.

Are there ethical sources of cobalt? Yes. Cobalt is also mined in Australia, Canada, and Morocco. However, their combined production is a fraction of what the DRC produces. Scaling these sources up to meet global demand will take decades.

Can we recycle cobalt from old batteries? Absolutely. Recycling is the best long-term solution. Companies like Redwood Materials and Li-Cycle are building massive facilities to shred old batteries and recover the cobalt. Current recovery rates are over 95%, meaning the same cobalt can be reused almost indefinitely.

Which car companies use the most cobalt? Generally, high-performance and long-range luxury EVs use cobalt-heavy chemistries (NMC or NCA) because they offer the highest energy density. Entry-level models are increasingly switching to cobalt-free LFP batteries.