The energy transition has put the critical metals At the center of the industrial board: lithium, cobalt, nickel, palladium, copper or neodymium are no longer a rarity, but the silent engine of batteries, electronics and renewables; battery recycling gain momentum to close that cycle.
In recent months, projects and advances have been activated with very different approaches—hydrometallurgy, biohydrometallurgy, advanced pyrometallurgy, and ultra-fast Joule heating—which, combined, point to a change of era. From Catalonia with RECIPLAC (computer recycling to recover palladium, copper and neodymium magnets), through the ReCell center in the United States and the ISASMELT pilot plant of the CSIC, to research that uses bacteria To select metals or processes that extract indium, gallium and tantalum without water or acids, the technological map is being rewritten at great speed; electronic waste are the flow where many of these solutions are applied.
Why recycling critical metals is urgent
The growth of electric vehicles and electronic devices is driving global demand for lithium, cobalt and nickelThese are materials with complex supply chains, often concentrated in a few countries, and with significant environmental and social impacts. The reality is stubborn: today, recycling is the norm. less than 5% of lithium-ion batteries, while lead-acid batteries are close to 99%. The gap is enormous, and its implications are strategic for any advanced economy; that's why Advances in lithium-ion battery recycling They are so closely watched.
Europe generates around two million tons per year of waste electrical and electronic equipment (WEEE), about 16,2 kg per person, a rate that leads the world rankings. This flow includes copper, rare earths, and platinum group metals that can and should be recovered. In fact, the European Commission already set a Action Plan on Critical Raw Materials with a 2030-2050 horizon to sustain strategic technologies and sectors without depending so much on imports. Many of these metals are key in the transition.
The pressure isn't just environmental or geopolitical; it's also business-related. For industries like automotive, electronics, and wind power, securing supply means securing their future. That's why interest in the industry is growing. design for recycling (think about recyclability from the origin of the product) and in processes that minimize costs, waste and carbon footprint, without penalizing the quality of the recovered materials. circular economy and inclusive recycling are key pieces in this change.
In the information field, the chemical and energy sector multiplies the dissemination of news through newsletters and WhatsApp channels, a sign of the dynamism of the ecosystem and its need to share results, milestones, and technology transfers in an agile and coordinated manner.
Cutting-edge innovations: from the laboratory to the pilot plant
In the United States, the national center ReCell based at Argonne National Laboratory is driving a collaborative ecosystem to accelerate the circular economy for critical battery materials. With initial funding of 15 million The three-year project brings together WPI, UC San Diego, NREL, Oak Ridge National Laboratory, and Michigan Technological University, as well as manufacturers, recyclers, suppliers, and automotive brands. Its objective is to bring recovery processes, battery redesigns, and scaled of technologies with industrial viability; the battery management applications are at the heart of that effort.
WPI contributes a key piece: a patented technology from the professor Yan Wang which allows the direct recovery of cathode material from lithium-ion batteries without depending on their specific composition. This approach is being validated on a pilot scale in Worcester, at a Battery Resourcers plant (co-founded by Wang), with an eye toward proving that technical efficiency matches business numbers. The idea that lithium batteries are recyclable is translated here into business processes.
The ReCell center itself has funded with $150.000 a study to understand how impurities present in used batteries alter the structure and performance of recycled cathodes, a critical issue as the industry moves toward cathodes with high content of nickel, more sensitive to contaminants and, therefore, to the quality of the process.
From Rice University comes another powerful line: processes of instantaneous Joule heating (FJH) combined with chlorination and carbochlorination to extract high-value metals from electronic waste. James Tour's team has demonstrated that it is possible to accurately separate gallium, indium and tantalum (from, for example, LEDs, conductive films or capacitors) without using water, acids or solvents, thus reducing waste and emissions compared to traditional hydrometallurgy. The objective is to validate methods suitable for real recycling plants.
The results are striking: by controlling the reaction, a purity greater than 95% and yields above 85%, with potential to extend the method to lithium and rare earthsFor the industry, this means cutting operating costs without sacrificing the quality of the recovered metal, paving the way for its adoption in real-world plants.
RECIPLAC: urban mining for palladium, copper, and neodymium
In Catalonia, the insertion company andromines coordinates the RECIPLAC project, with technical support from the technology center Eurecat and the Universitat Politècnica de Catalunya – BarcelonaTech (UPC), specifically the Biohydrometallurgy group at the Manresa Campus. Their challenge: to design an advanced process of computer recycling capable of recovering high-value critical metals, particularly palladium, copper and neodymium magnet arrays from hard drives.
The proposal combines three strategies that are executed in an integrated manner and with logic of circular economy and urban mining. First, the printed circuit boards (PCBs) undergo selective sorting. palladium-rich components and then hydrometallurgical techniques are applied for its recovery. This is a double step that increases efficiency and improves process performance.
In parallel, the same PCIs are treated with processes biohydrometallurgical Next-generation copper extraction methods. These methods utilize microbial and mild chemical routes to separate and concentrate the metal, with lower energy consumption and less waste than conventional thermal methods.
The third front addresses the magnets of hard drives: through specific hydrometallurgical processes, they are transformed into matrices of neodymium magnet which can act as high-quality precursors for manufacturing new magnets. This is key to closing the cycle of an essential component in electric motors and generators.
In addition, the consortium studies other materials from computer disassembly, with the goal of optimizing reuse based on sustainability criteria. The approach is practical: if a secondary stream can be recovered with good quality and at a reasonable cost, it is integrated; if not, it is re-evaluated for subsequent phases.
El investigador Toni Dorado, who coordinates the Biohydrometallurgy group at the UPC in Manresa and is a professor at EPSEM, stresses that the project represents a significant step in the transfer from an innovative technology born in Catalonia to the business fabric of the territory, especially within the field of electronic waste recycling.
From Eurecat, Albert Martínez Torrents (Waste, Energy and Environmental Impact Unit) focuses on the logic of urban mining of the initiative and the need to activate combined solutions to maximize the recovery of critical metals with environmental and economic guarantees.
To Núria Sau, project director of Andròmines, RECIPLAC is also a social catalyst: it demonstrates that technological innovation and community engagement can work together to transform recycling, create jobs, and strengthen the local economy. This is no small feat, as these types of projects demonstrate industrial impact and, at the same time, social value.
On the financial level, RECIPLAC has a budget greater than 330.000 Euros, of which 250.000 Euros come from the call for Green 2024 R&D Nuclei from ACCIÓ and the Catalan Waste Agency. The project also has technical advice from the company Datambient, a specialist in waste management.
Spain and Europe: RC-Metals and the smart pyrometallurgical path
The Higher Council for Scientific Research (CSIC) leads the RC-Metals project with a clear objective: to recover metals contained in electronic waste and manufacture high-value alloys through advanced technologies. Its great advantage is a pilot plant, unique in Europe, based on ISASMELT (referred to as ISASMELT-GLENCOR in the project), a molten bath smelting route capable of handling complex mixtures and extracting metal fractions with high efficiency. This development connects with debates on the boom in critical metals mining and new strategies to ensure supply.
The new pilot facility — described as ISASMELT F600— seeks to expand European scientific knowledge and technological capacity to reduce waste and dependence on imported critical raw materials. This is a move aligned with the European Action Plan, which recognizes the essential role of rare earth such as dysprosium, neodymium or praseodymium in wind power, photovoltaics or electric mobility.
The CSIC researcher Felix Antonio Lopez (CENIM-CSIC) warns about possible supply tensions due to the current rate of consumption, and reminds that the copper It is a pillar of electrification and decarbonization, from grid infrastructure to vehicles and solar plants. The priority, therefore, is to recover as much WEEE as possible and reincorporate it into the value chain; different materials and their consequences in the middle they underline that urgency.
The development of the RC-Metals project is funded by the Ministry for Ecological Transition, from the CSIC itself and Atlantic Copper. In addition, there are framework agreements with companies and entities such as Albufera Energy Storage, Colorobbia, Tatuine, Clemente Román, Técnicas Reunidas, the University of Zaragoza, and the Circe Foundation, forming a diverse consortium focused on industrial development.
Biotools and alternative paths in recycling
Bioengineering is also making a strong entrance. A team from the University of Edinburgh is using bacteria to extract lithium, cobalt, manganese, and other metals from spent batteries and electronic scraps. As the professor explains Louise Horsfall, take advantage of the natural resistance and selectivity of microorganisms to "fish» metal ions and convert them into nanoparticles allows you to separate valuable elements with precision, metal by metal; there the cobalt extraction biotechnology is an example of interest.
Within this approach, the engineer Nathalie Madoc describes a "metal soup" in which dissolved ions are made available to "specialized" bacteria to form small pips metallic. It's a route that requires testing and fine-tuning per element, but it has the potential to scale when the supply of end-of-life batteries increases.
Professor Andy Abbott (University of Leicester) issues a pragmatic warning: electric vehicle batteries are lasting longer than expected, so today there are few modules available for recycling. Although the technology exists to convert the material into chemical precursors for new cathodes, the economics of the process do not always match the scale and manual disassemblyIt's a matter of time and volume.
Despite the current shortage of supply, striking experiments are flourishing. A consortium led by the University of Durham has been shown to transform cobalt into Vitamin B12 as a biotechnological proof of concept, and the bioremediation The fight to curb water pollutants is gaining momentum. Science advances, but the geopolitical landscape is also shifting: China has halted the export of rare earth extraction and separation technologies, considering them strategic.
In parallel, companies such as Tusaar Corporation (Colorado) claim to be able to recover at least the 95% of critical metals and scale up its processes, supporting a circular economy with part of the supply available domestically. Its CEO, Gautan Khanna, argues that recovering value from end-of-life products strengthens autonomy and stabilizes supply chains, a key objective for the Americas and Europe.
What technologies contribute and how they combine
The mosaic of solutions is not exclusive; quite the opposite. hydrometallurgy (solution chemistry) works very well for palladium, cobalt and rare earths when relatively clean streams are available; biohydrometallurgy reduces chemicals and energy in certain steps, and the pyrometallurgy Advanced ISASMELT type shines with complex mixtures that require selective melting to efficiently separate metals.
Emerging methods such as Joule heating F.J.H. They cover a key niche: ultra-fast separations, with fine temperature control and without water or acids, which reduce the environmental footprint and costs. And, to close the circle, strategies for design for recycling (for example, cells with adhesives and collectors designed to facilitate disassembly) make the entire process more agile and cheaper.
That's where projects like ReCell They make the difference: they bring together academia, national laboratories and companies to prioritize lines with real potential and take them to pilot and, from there, to the industryThe fact that a patented technology, such as Yan Wang's cathode recovery technology, is operating in a demonstration plant is an important sign of maturity.
At the regional level, RECIPLAC y RC-Metals They share an idea: to generate local capacities to process their own waste, recover it, and reduce external dependence. Public support—ACCIÓ and the Catalan Waste Agency in one case; MITECO, CSIC, and industrial partners in the other—catalyzes investments and, no less importantly, transfer to the productive fabric.
It is not a minor detail that RECIPLAC integrates andromines, a social inclusion entity: in addition to recovering high-value metals and optimizing secondary flows, the project creates employment and qualifications around a technological challenge. It's a good example of how the transition can be both green and fair.
Environmental impact, costs and traceability
Recycling critical metals cuts the need for primary mining, with direct benefits: less deforestation, less waste, and fewer greenhouse gases associated with extraction and transportation. Processes like FJH that dispense with acids and water further push the environmental balance towards recycling rather than the exploitation of new deposits.
But the impact is not measured only in CO2; traceability and purity are equally important. Achieving >95% purity and >85% yield, as demonstrated by trials with indium, gallium, and tantalum, enables their return to high-value applications (optoelectronics, conductive coatings, high-performance capacitors) without any performance penalty.
There remains, however, the challenge of operating costs In an environment where the price of virgin metal fluctuates and can erode recycling margins. This is where incentives come in, along with product standardization to facilitate end-of-life, and long-term contracts that provide visibility to those who invest in plants and technology.
Another delicate issue is the to maximise security and your enjoyment. and battery disassembly: Reducing manual interventions, automating, and ensuring protocols are crucial for recycling to be competitive and safe. The industry is already exploring robotic equipment and shielded stations, an area where accumulated learning quickly translates into best practices.
Communication, open knowledge and multilingualism
Dissemination also counts. Recent reports—such as the one by Miguel Ángel García Vega— have put the spotlight on the potential of bioengineering, the low recycling rate of many metals (below the 5%) and the geopolitical rebalancing linked to rare earths. Specialized media, for their part, reinforce their coverage with newsletters and real-time channels for a technical community looking to stay up-to-date.
Linguistic plurality appears as a strength: several sources These projects offer versions in Catalan and Spanish, which is useful for transferring knowledge to the entire chain—administration, companies, technology centers, and citizens—without unnecessary barriers.
What's next: climbing with your head
The overall picture suggests a convergence: hybrid processes, pilot plants moving to demonstration, recycling-oriented design and political decisions that favor circularity. In parallel, quality standards and certification that allow recycled metals to compete head-to-head with virgin metals, especially in sensitive sectors such as electric vehicles.
There is also a greater responsibility of the producer and the end of practices of the past (for example, burying components such as wind blades (old ones), replaced by obligations to remove and recycle responsibly. Added to all this is a cultural shift: more and more companies want their supply chain to be resilient, traceable and low-carbon, and recycling critical metals is a central piece of that puzzle.
With projects like RECIPLAC, the impulse from the center ReCell, the way ISASMELT de RC-Metals With advances such as FJH and biological extraction, the sector is moving towards solutions that combine technology, social impact, and economic viability. If we add to this coherent policies and intelligent design, the recycling of critical metals can become a true industrial engine of the energy transition, here and now.
