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Old Batteries Can Be Sources of New Energy

Driving an electric-powered vehicle (EV) rather than one reliant on fossil fuels is a key way to tackle climate change and improve air quality — but it does leave the old batteries behind as a nasty residue. New technologies give rise to their own sets of problems. The all-important battery in an EV has a limited life span — due to high operating temperatures, changing discharge rates and other factors, batteries in EVs in use today are unlikely to last for more than 10 years.  The question is what to do with all those batteries once they have reached the end of their operating life. The dumping of electronic or e-waste — made up of old computers and other everyday equipment — is already a massive worldwide problem: EV industry analysts say similar difficulties could develop when EVs and their batteries reach the end of their lives. But a recent study by scientists at the University of Birmingham, UK, and colleagues, published in the journal Nature, comes up with some solutions. It says valuable materials, including cobalt, could be extracted or "harvested" from the EV lithium-ion batteries when they no longer work: these materials could then be used to make new batteries. Read more....

 

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