Previous mining strategies make a brand new option to recycle lithium batteries (News)



IMAGE: Utilizing 100-year-old minerals processing strategies, chemical engineering college students have discovered an answer to a looming 21st-century drawback: how one can economically recycle lithium ion batteries.
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Credit score: Lei Pan, Michigan Tech

Lei Pan’s group of chemical engineering college students had labored lengthy and onerous on their analysis mission, and so they had been completely satisfied simply to be exhibiting their outcomes on the Individuals, Prosperity and the Planet (P3) competitors final April in Washington, DC. What they did not anticipate was to be mobbed by enthusiastic onlookers.

“We obtained a number of ‘oh wow!’ responses, from eight-year-olds desirous to know the way it labored to EPA officers questioning why nobody had executed this earlier than,” says senior Zachary Oldenburg. “My response to the EPA was, ‘As a result of nobody else had a mission chief who’s a mining engineer.'”

Pan, an assistant professor of chemical engineering at Michigan Technological College, earned his graduate levels in mining engineering. It was his concept to adapt 20th century mining expertise to recycle lithium ion batteries, from the small ones in cell telephones to the multi-kilowatt fashions that energy electrical automobiles. Pan figured the identical applied sciences used to separate metallic from ore could possibly be utilized to spent batteries. So he gave his college students a crash course in primary minerals processing strategies and set them free within the lab.

“My thoughts goes again to the start, when nothing was working,” says Trevyn Payne, a chemical engineering senior. “Lots of instances it was, truthfully, ‘Let’s simply do this.’ Typically when issues labored out, it was sort of an accident.”

Oldenburg gives an instance. “We had been making an attempt all types of solvents to liberate chemical substances, and after hours and hours, we came upon that plain water labored one of the best.”

However ultimately, every part got here collectively. “You’ll be able to see your outcomes enhance experiment by experiment,” explains doctoral pupil Ruiting Zhan. “That is fairly good. It offers you a way of feat.”

The group used mining business applied sciences to separate every part within the battery: the casing, metallic foils and coatings for the anode and cathode, which incorporates lithium metallic oxide, probably the most worthwhile half. The elements might be returned to the producer and re-made into new batteries.

“The largest benefit of our course of is that it is cheap and power environment friendly.” Ruitang Zhan

“For the aim of remanufacturing, our recycled supplies are pretty much as good as virgin supplies, and they’re cheaper,” Oldenburg provides.

The truth that their course of is tried and true is maybe its most tasty high quality to business, Pan notes. “We noticed the chance to make use of an current expertise to deal with rising challenges,” he says. “We use customary gravity separations to separate copper from aluminum, and we use froth flotation to get well vital supplies, together with graphite, lithium and cobalt. These mining applied sciences are the most cost effective out there, and the infrastructure to implement them already exists.”

Passers-by weren’t the one ones on the P3 competitors impressed by the scholars’ effort. AIChE’s (the American Institute of Chemical Engineers) Youth Council on Sustainable Science and Expertise (YCOSST) has introduced it will likely be presenting the group its YCOSST P3 Award, which acknowledges the mission “that finest employs sustainable practices, interdisciplinary collaborations, engineering ideas and youth involvement, and whose design is straightforward sufficient to have a sustainable impression with out requiring important technical experience of its customers.”


The group members, together with Oldenburg, Payne, Zhan and undergraduate Lucille Nunneley, might be given the award in October, on the AIChE annual assembly in Pittsburgh, the place they can even current their outcomes. The award contains $1,000 to assist cowl pupil journey prices.

To advance their analysis, Pan has obtained funding from the Michigan Technological College Translational Analysis and Commercialization (MTRAC) statewide Innovation Hub.

The mission was funded by a $15,000 grant from the Environmental Safety Company and an article on their work, “Restoration of Lively Cathode Supplies from Lithium-Ion Batteries Utilizing Froth Flotation,” authored by Pan, Zhan and Oldenburg, was revealed on-line June 15 in Sustainable Supplies and Applied sciences.

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