To Make an Eco-Friendly EV Battery, Think From the Inside Out

Battery packs are designed to stuff a lot of energy into a small amount of space. Some think they should be built for recycling too.

In an ivy-covered warehouse in the gentle hills of northern Switzerland, Olivier Groux has built a machine that takes apart batteries, part by part. It looks like a big blue safety cabinet, the kind you might see in a lab that handles Ebola, with thick gloves mounted on the sides to reach inside safely. The job is simple: Peel away the metal strips that adhere to a polymer and act as the battery’s electrodes. As the polymer sheet trundles through a system of pulleys, the

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