https://www.sciencenews.org/article/recycled-lithium-ion-battery-charge?utm_source=email&utm_medium=email&utm_campaign=latest-newsletter-v2&utm_source=Latest_Headlines&utm_medium=email&utm_campaign=Latest_Headlines
“Based on our study, recycled materials can perform as well as, or even better
than, virgin materials,” says materials scientist Yan Wang of Worchester
Polytechnic Institute in Massachusetts.
Using shredded spent batteries, Wang and colleagues extracted the electrodes
and dissolved the metals from those battery bits in an acidic solution. By
tweaking the solution’s pH, the team removed impurities such as iron and copper
and recovered over 90 percent of three key metals: nickel, manganese and
cobalt. The recovered metals formed the basis for the team’s cathode material.
In tests of how well batteries maintain their capacity to store energy after
repeated use and recharging, batteries with recycled cathodes outperformed ones
made with brand-new commercial materials of the same composition. It took
11,600 charging cycles for the batteries with recycled cathodes to lose 30
percent of their initial capacity. That’s about 50 percent better than the
respectable 7,600 cycles for the batteries with new cathodes, the team reports
October 15 in Joule. Those thousands of extra cycles could translate into years
of better battery performance, Wang says.
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