Cobalt essential for electric car batteries and smartphones is frequently mined by children. Companies are using technology to track source of the mineral

Ford, IBM and LG have joined forces to use blockckain to prevent child labour being used to mine minerals essential for making smartphones and electric cars.

The three multinationals and China’s Huayou are using the technology to track cobalt mined in the Democratic Republic of Congo along the supply chain to batteries making batteries for Ford’s electric vehicles. Surging demand has meant a boom in cobalt mining in the DRC, which produces around 60 per cent of the global supply. Cobalt mining also pollutes local land has been linked to corruption.

The four companies said they were using IBM’s blockchain platform to monitor cobalt through entries on a tamper-resistant database from the point that the mineral is extracted.

Demand for cobalt is expected to increase eightfold by 2026 as the number of cars, laptops, tablets and other devices multiplies.

Increasing awareness among consumers of the human rights abuses associated with cobalt mining has put pressure on firms to act.

Blockchain, the technology underpinning bitcoin, uses multiple copies of data held on different computers, to create a shared record that is more secure than conventional databases.

In the pilot, cobalt from Huayou’s mine will be securely bagged up, with details entered into IBM’s blockchain, before being sent to LG’s battery plant in South Korea and then arriving at Ford’s factory in the US.