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New Tech Could Restart The Lithium Boom

Lithium Boom

A research team is close to patenting a new technique to extract lithium from brine that could revolutionize the lithium extraction process and potentially cut the production costs of one of the key components of lithium-ion batteries.   

A team of researchers from Australia’s Monash University, Australia’s national science agency CSIRO, the University of Melbourne, and the University of Texas at Austin, have developed a new filtering technology to extract lithium ions from brine. This technology has a much higher recovery rate than current extraction techniques and cuts the extraction process time down to just a few hours from several months to years in current lithium extraction.

The new way to ‘mine’ lithium could significantly cut lithium costs for batteries for electric vehicles (EVs) and stationary energy storage, giving another impetus to electric mobility and the energy transition.  

The international research team developed a technology that mimics the filtering function of biological cell membranes. The scientists came up with a synthetic Metal-Organic Framework (MOF) membrane capable of filtering lithium ions very fast and in a highly selective manner, the team said in their paper published in the journal Nature Materials.  

“These findings suggest ways to develop ion selective devices for efficient ion separation, energy reservation and power generation,” the authors said in the study.

“Based on this new research, we could one day have the capability to produce simple filters that will take hours to extract lithium from brine, rather than several months to years,” Professor Huanting Wang, co-lead research author and Professor of Chemical Engineering at Monash University, said in a statement. Related: Can Trump Push Through Payroll Tax Relief?

The new technology is also much more efficient than extracting lithium from ponds via a solar evaporation process, according to the researchers.

Studies have shown a lithium recovery rate of around 90 percent for the new technology—much higher than the current 30-percent recovery rate during the solar evaporation process of lithium extraction, Professor Huanting Wang added.   

“We’re pleased that our international research collaboration has made a breakthrough that could improve the supply of lithium. This is important for enabling electric vehicles and grid integration of renewable energy sources,” CSIRO and Monash University Associate Professor Matthew Hill said.

The new technology is subject of a worldwide patent application filed last year, Monash University said, noting that Energy Exploration Technologies, Inc (EnergyX) has executed a worldwide exclusive license to commercialize the technology.

According to EnergyX, the direct extraction via a membrane technology could extract lithium in a few days compared to 18 months in lithium evaporation ponds. In addition, lithium ponds use 18,000 gallons of freshwater per ton, while the new technology doesn’t use freshwater, potentially saving water resources in lithium brine-rich areas such as the so-called lithium triangle in Chile, Argentina, and Bolivia. In price comparison, the direct membrane filtering of lithium, the so-called lithium refinery, costs half the cost of lithium evaporation ponds, EnergyX says. Related: How One Country Saved Itself From The Oil Price Plunge

“This breakthrough invention will literally change the way lithium is produced and how we power our future,” Teague Egan, founder and CEO at EnergyX, said in Monash University’s press release.

Faster and cheaper lithium extraction could help further reduce EV battery pack costs, which have already fallen a lot over the past decade.

EV battery pack costs have dropped from as much as $1,100 per kWh ten years ago to just $156 per kWh last year, according to BloombergNEF. Meanwhile, the energy density of lithium ion battery cells has tripled over the last ten years, BloombergNEF has estimated. 

Lower costs of lithium extraction could make EVs cheaper and help them bridge the gap in prices with conventional internal combustion engine (ICE) vehicles faster than previously expected, thus spurring increased electric mobility adoption.

By Tsvetana Paraskova for Oilprice.com

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