To make lithium batteries you need cobalt, and there are practical and moral concerns about the supply of the rare metal. Prices have spiked by 80% this year, sparking a new era of prospecting.
What is cobalt and where does it come from?
It’s a chemical element produced in supernovas and found in the Earth’s crust. Usually it’s mined as a byproduct of nickel and copper; when smelted, it’s a hard, shiny blue-silver metal.
Sixty percent the world’s cobalt reserves are in the Democratic Republic of Congo, where political instability and violence has created a serious moral dilemma for companies such as Tesla and Apple. The United Nations reportedly found scores of mass graves in the country this year, which it links to government forces.
Some companies have pulled out of mining in the DRC to focus on mines in other countries, especially Canada. However, the DRC’s massive deposits mean it will be crucial to fulfilling the growing demand for batteries and other components in the years to come.
The word is derived from the German kobold,**meaning “goblin,” so called because the ore only had tiny quantities of desirable metals and gave off poisonous fumes when smelted.**
BY THE DIGITS
The cobalt industry
In September, Volkswagen put out a tender for a massive 10-year supply of cobalt—an estimated 24-36 million kg per year, worth $1.6–$2.4 billion at current prices. That’s one of the largest procurement projects in automotive history.
Bullish investors recently pushed Tesla and Apple stock to record highs, but a steady supply of cobalt will be crucial to making their plans a reality. Tesla wants to make 500,000 electric cars in 2018, but also says it wants to source the cobalt from North America, which won’t be easy.
Singing the blues
In the early 1980s, a Bronze-age ingot of blue glass was found on the Uluburun shipwreck off the Turkish coast. For millennia, cobalt blue pigment, formed by mixing cobalt compounds with alumina, has been used as a dye and to color glass and ceramics. The oldest known cobalt-colored glass dates from Egypt’s 18th dynasty (1550-1292 BC) but it’s also been found in Persian jewelry from the third millennium BC, in the ruins of Pompeii, and in China dating as early as the Tang dynasty (618-907 AD).