There’s been an era-defining race underway between two types of batteries used in electric vehicles: lithium batteries that use cobalt, and ones that use iron phosphate. Cobalt, a metal with a checkered human rights record, has been in the lead. Until recently. 

Henry Sanderson’s book on the elements that build electric vehicles is Volt Rush: The Winners and Losers in the Race to Go Green.

Related episodes: 
The race to produce lithium 
How batteries are already changing the grid 
How batteries are riding the free market rodeo in Texas 
How EV batteries tore apart Michigan (Update) 
Batteries are catching fire at sea 

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