A single cobalt shock could trigger global EV battery supply chaos | ScienceDaily

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A single cobalt shock could trigger global EV battery supply chaos

Date:<br>June 20, 2026<br>Source:<br>Chinese Society for Environmental Sciences<br>Summary:<br>The global cobalt supply chain is more interconnected—and more vulnerable—than previously thought, with disruptions capable of triggering far-reaching cascades across multiple countries and industries. Researchers warn that protecting battery supply chains will require system-wide coordination because critical bottlenecks can turn local shocks into global problems.<br>Share:

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A new study warns that a single disruption in the cobalt supply chain could spark a global ripple effect, exposing hidden weaknesses in the battery industry. Credit: Shutterstock

Cobalt is a critical ingredient in lithium-ion batteries used in electric vehicles and energy storage systems, but new research suggests the global cobalt supply chain may be far more vulnerable than previously recognized. Rather than being limited to isolated shortages, disruptions in one country or production stage can spread through the network, triggering cascading failures across multiple regions and industries.

By combining material flow analysis with a multilayer shock propagation model, researchers found that risks often originate in upstream parts of the supply chain but become most severe at key refining and manufacturing bottlenecks. The study shows that shocks can move through both horizontal and vertical pathways, as well as through direct and indirect connections, creating long chains of disruption and sudden breakdowns. These findings suggest that traditional country-by-country risk assessments fail to capture the full extent of the cobalt supply chain's vulnerability and that coordinated system-wide strategies are needed to strengthen resilience.

Rising Demand and Growing Supply Chain Risks

The rapid growth of electric vehicles and large-scale energy storage has driven a sharp increase in demand for cobalt. As a result, concerns about supply security, geopolitical concentration, and environmental and social challenges have intensified.

Many existing studies evaluate critical minerals by looking at individual countries, materials, or trade flows separately. However, modern supply chains are highly interconnected, with complex relationships linking suppliers, manufacturers, and consumers across multiple stages of production. Recent events, including export restrictions, trade disputes, and pandemic-related disruptions, have demonstrated how local problems can quickly spread through global production networks.

Despite these risks, many current analytical methods struggle to explain how disruptions move simultaneously through different countries and stages of production. This limitation highlights the need for a broader, network-based approach to understanding cobalt supply chain vulnerabilities.

Mapping the Global Cobalt Network

In a study published online in late 2025 in Environmental Science and Ecotechnology, researchers from the Chinese Academy of Sciences, Peking University, the University of Southern Denmark, and other institutions examined global cobalt flows between 1998 and 2019.

The team built a multilayer supply chain model and applied an iterative shock propagation framework to track how disruptions move both across countries and through six stages of the cobalt life cycle, including mining, refining, manufacturing, use, and recycling. The resulting analysis provides one of the most detailed examinations of systemic risk in the global cobalt supply chain to date.

To conduct the study, the researchers created a network connecting 230 countries across six interlinked production stages. By combining trade-based material flow analysis with a dynamic shock propagation model, they were able to simulate how a supply shortage or drop in demand at a single point in the network could spread through the broader system.

Their simulations showed that disruptions often travel through alternating direct and indirect pathways, moving across international trade links as well as domestic production chains. Mining disruptions, especially in highly concentrated upstream regions, frequently act as the initial source of risk. However, the most severe consequences tend to emerge later at refining and manufacturing "bridges," where dense connections between production stages amplify failures.

Hidden Interdependencies Increase Vulnerability

The researchers found that the resulting "avalanche network" of potential failures is approximately four times denser than the underlying physical trade network. This finding points to extensive hidden interdependencies that are not apparent when examining trade relationships alone.

Countries including China and the United States showed particularly high levels of systemic fragility. In...