This is good news, though pretty much expected, I think. But it's good
to see that it's possible to extract metals and reuse them, unlike
compared to the plastics recycling debacle. The public needs to hear
things like this.
This summary doesn't have much detail, which may be present in the full
paper. It doesn't make any sense to me that metals extracted from
recycling should outperform virgin material. Of course, they don't
describe the chemistries and technologies used in either the original
cells or the ones they made. Also, 90% leaves important room for
improvement. That implies 10% waste plus all the waste created from the
extraction process. On a large scale that would be a huge amount of,
probably, very toxic waste.
And, of course, the best "recycling" is direct reuse, e.g., for backup
power.
Peri
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------ Original Message ------
From: "Rod Hower via EV" <ev@lists.evdl.org>
To: "Electric Vehicle Discussion List" <ev@lists.evdl.org>
Cc: "Rod Hower" <rodho...@ameritech.net>
Sent: 02-Nov-21 06:35:18
Subject: [EVDL] Recycled battery materials perform as well as or even
better than virgin materials
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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