IN SUMMARY
Cobalt is a greyish-silver ferromagnetic metal that is scarce in the Earth's crust, present at just 15–35 parts per million. Despite that scarcity it has become a key battery material, valued for the stability and safety it brings to lithium-ion cathodes at high temperatures. In 2023, global cobalt supply passed 200,000 tonnes for the first time, with the EV industry now driving close to half of all demand. But cobalt is almost always produced as a byproduct of copper or nickel mining, and where it comes from strongly shapes how it is processed and what it costs the environment. This guide, part of Minviro's "Explore the Elements" series, introduces cobalt's sources, processing routes and the role of LCA.
Cobalt is a battery metal, mostly mined as a byproduct. Around 45% of demand comes from EV batteries, where cobalt stabilises the cathode, yet it is primarily produced as a byproduct of copper or nickel, with portable electronics (26%) and superalloys (9%) making up much of the rest.
Supply is highly concentrated. The Democratic Republic of Congo accounts for 74% of world production, mainly from sediment-hosted copper-cobalt deposits, followed by Indonesia (7%, from nickel laterites) and Russia (4%, from nickel sulphides).
Processing route drives the footprint. Cobalt is refined hydrometallurgically or pyrometallurgically depending on the deposit, and the energy-intensive pyrometallurgical route is generally less environmentally favourable, which LCA can quantify.
What cobalt is, and why batteries need it
Cobalt is a greyish-silver metal in the ferromagnetic family, and it is genuinely scarce, present in the Earth's crust at just 15–35 parts per million. Its commercial story is now closely tied to batteries. According to the Cobalt Institute, global cobalt supply surpassed 200,000 tonnes for the first time in 2023, growing 14% in a single year, driven by a 10% rise in demand to near 200,000 tonnes. The standout driver is electric vehicles, which account for around 45% of demand, because cobalt provides important stability and safety at high temperatures as a component of lithium-ion battery cathodes. The remainder comes mainly from portable electronics (about 26%) and superalloys (about 9%), a reminder that while EVs dominate the growth story, cobalt remains a multi-industry material.
Sources and where cobalt comes from
Cobalt is unusual in that it is primarily produced as a byproduct of copper or nickel mining; the main exception is arsenide deposits, where cobalt is the primary product. There are three main deposit types globally: sediment-hosted copper-cobalt deposits, nickel-cobalt laterite deposits, and magmatic nickel-cobalt sulphide deposits. Supply is strikingly concentrated: the US Geological Survey reports that the Democratic Republic of Congo accounts for 74% of world production, mostly from sediment-hosted copper deposits in the Central African Copperbelt. The second and third largest producers are Indonesia (7%, where cobalt comes from extensive nickel laterite deposits) and Russia (4%, from magmatic nickel sulphide deposits). The deposit a given batch of cobalt originates from significantly dictates the processing methods used, which in turn shapes its environmental footprint.