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On 12 December 2024, the third edition of the annual workshop of the Cluster Hub “Production of Raw Materials for Batteries from European Resources” took place in Brussels, being co-organised by EU-funded projects RHINOCEROS, CRM-geothermal and CICERO. This third edition, along with an increasing number membership, confirm the hub’s role as a dynamic ecosystem that continues to generate innovations in the European battery materials sector.
The hub’s annual workshop, held as a satellite event of the Raw Materials Week 2024, provided once again a platform for presenting the most promising results from participating projects. Two technical sessions covered the entire battery value chain, from raw materials mining to recycling, while the opening conveniently portrayed the policy, the regulatory and strategic frameworks that support and drive the EU R&I initiatives in the battery sector.
Policy perspectives and supporting mechanisms for the battery sector
Susana Xara, Project adviser on raw materials at European Health and Digital Executive Agency (HaDEA), established the discussions tone, navigating through the insights of the Critical Raw Materials Act [CRMA] and the Net Zero Industry Act [NZIA] and focusing on their contribution to securing a sustainable supply of critical raw materials for the European battery industry.
Wouter IJzermans, BEPA Executive Director, presented the long-term vision and potential revisions of their roadmap, emphasising the importance of policy frameworks and incentives in promoting battery innovation and deployment across Europe.
The presentation of Vasileios Rizos from the Centre for European Policy Studies (CEPS) identified various barriers and challenges emerging from the EU policy framework on batteries, based on inputs from 20 companies across the entire battery value chain, including partners from the BATRAW project, member of the Cluster Hub since 2022. The representative of CEPS concluded with a set of policy messages referring to early dialogue channels established between policy-makers and various stakeholders. Before the legal requirements entry into force, this information exchange on availability of secondary data sets could enable stakeholders to assess the data quality, select suitable sets of information and identify potential data gaps.
Publicly available resources submitted by CEPS:
- Barriers and policy challenges in developing circularity approaches in the EU battery sector: an assessment – CEPS
- Implementing the EU digital battery passport – CEPS
- Compliance with the EU’s carbon footprint requirements for electric vehicle batteries – CEPS
Orchestrating the launch and on-going work of the Cluster Hub, PNO Innovation Belgium [part of PNO Group – leader in innovation and funding consultancy], represented by Dr. Nader Akil, concluded the first session with an overview of all EU funding programmes supporting research, innovation and investment in raw materials production for batteries. Additional to the upcoming funding opportunities and guidance on selecting the appropriate funding opportunities based on the status of technology, Dr. Nader Akil introduced another initiative launched by PNO Group – DIAMONDS4IF. This project supports the preparation of Innovation Fund applications, enabling the transfer of H2020 research results into successful ventures and securing investment funding.
Download Funding Schemes presentation
The third session of presentations commenced with an outline of the main findings of the LIFE DRONE project, which concluded in June 2024. Presented by Lorenzo Toro, process engineer at Eco Recycling, the project demonstrated the feasibility of producing high-quality NMC oxide and graphite from recycled batteries. The innovative process confirmed significant environmental benefits, with a reduction of 59 % in terms of kg CO2 eq. Additionally, one plant is estimated to treat 500 tonnes of batteries/year. The technical-economic evaluation of this industrial plant, with a potential capacity of 500 tons/year, showed a return on investment (ROI) of 31.64 % and a payback time (PBT) of 3.16 years. The analysis indicated that attractive payback times could be obtained even with varying prices for NMC and graphite.
Download LIFE DRONE presentation
RHINOCEROS presenting results of the Electrochemical Li recovery strategy from LIBs black mass
The electrochemical Li recovery from Li-ion battery black mass, investigated in the RHINOCEROS project and presented by Prof. Pier Giorgio Schiavi from Univ. of Sapienza reported Li extraction yields from end-of-life (EoL) LIBs in the range of 82 %, and faradaic efficiency compared to commercial cathode materials (close to 100 %). Researchers have investigated potential causes that could explain the relatively low selectivity ranges of Li and other metals available in black mass. The simultaneous oxidation of impurities found in the black mass can be a justified explanation for the preliminary results obtained. Experimental results show that the extraction percentages for Co, Ni, and Mn remain in very low ranges. When contemplating upscaling scenarios, Prof. Schiavi mentioned the researchers are evaluating an alternative approach that enables the treatment of larger quantities of powder without replicating the manufacturing process of LIB electrodes.
Download RHINOCEROS presentation
The session featured also presentations of other initiatives addressing the batteries recycling topic: Benjamin P. Wilson, Senior Scientist, Hydrometallurgy and Corrosion at Aalto University on behalf of the RESPECT project, Miguel Aguilar, researcher at LEITAT Technological Centre for the BATRAW projects, and Joana Gouveia [Researcher at the Institute of Mechanical Engineering and Industrial Management (INEGI) and America Quinteros [Researcher at LUT Univ.] for the ReLiEF initiative.
The second day of the RHINOCEROS M24 meeting featured the presentation of the TranSensus LCA project, delivered by Prof. Dr. Ing. Thilo Bein. This cross-collaboration initiative aimed to open cooperation activities between the two projects, focusing on the development and application of a harmonised life-cycle assessment (LCA) approach for zero-emission road transport.
Prof. Dr. Ing. Thilo Bein presented the TranSensus LCA project, coordinated by Fraunhofer and launched in January 2023. The project aims to establish a commonly accepted and applied LCA approach for zero-emission road transport while developing a framework based on European data. This initiative involves stakeholders from industry, research, standardisation bodies and the European Commission. The project’s scope could extend internationally, with coordinators planning a wider stakeholder consultation to inform further guidelines and policy recommendations.
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Potential collaboration routes between RHINOCEROS and TranSensus on LCA topics
The exchange of questions and ideas during the presentation spurred significant interest and facilitated collaboration opportunities between the two projects. The representatives of RHINOCEROS LCA work package received invitations to participate in future trainings organised by TranSensus. These workshops are designed to equip participants with advanced knowledge and skills in life-cycle assessment methodologies. By integrating the harmonised LCA approach proposed by TranSensus in the future, RHINOCEROS has the possibility to contribute to the broader goals of this coordination and support initiative and potentially influencing policy development.
Discussions about LCA raised additional questions about life-cycle costing (LCC). Although not comprised in the scope of work of TranSensus, future guidelines will include also recommendations on how to tackle LCC in common approach. TranSensus will continue publishing reports and guidelines towards the end of this year. Among other topics, these deliverables will address:
- Modelling technology penetration in the market
- Recommendations on how to model the energy mix for sensitivity analysis
- Various use cases, RHINOCEROS being a potential candidate for this category
Discover TranSensus deliverables
When it comes to recycling lithium-ion batteries (LiBs), safety and efficiency are paramount. Classified as hazardous waste under EU legislation, spent LiBs pose significant risks, primarily due to their state-of-the-art (SoA) non-aqueous electrolytes. This complex mixture, which includes conductive salts dissolved in organic solvents and additives, is flammable, volatile, and toxic. By their very nature, the uncontrolled release of these components can harm the environment and endanger workers in recycling plants. Additionally, electrolyte residues in LiB waste streams represent a financial burden for the recycling industry since they are still classified as hazardous waste. Therefore, safely recovering the electrolyte is crucial for developing a secure recycling process.
One promising alternative to traditional methods like vacuum vaporization is supercritical carbon dioxide (ScCO2) extraction. The easily adjustable properties and excellent mass-transfer characteristics of ScCO2 make it potentially ideal for selectively extracting electrolyte components from LiB waste, resulting in purified extraction products. Previous research has demonstrated that non-polar electrolyte solvents like dimethyl carbonate (DMC) and ethyl methyl carbonate (EMC) can be extracted using low-density CO2.
Recent results reported by the research team at University of Chalmers (CHA)have shown that by gradually increasing pressure and temperature conditions, more polar electrolyte components such as ethylene carbonate (EC), and propylene carbonate (PC) can also be successfully extracted. However, selective extraction of solvents remains a challenge, requiring further thermodynamic and kinetic data to optimise the process.
Modelling the extraction behaviour allows the designing of an optimised extraction process that achieves high purity solvents. This high purity enables the recycling industry to either resell the solvents for other uses or even reuse them in battery production, making the process more sustainable and economically viable.
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Work package (WP) 6 partners, notably ECO RECYCLING (IT) team, have completed the first version of the simulations of various hydrometallurgical processes. These tools are essential for the next scaling step since they provide a first version of the material and energy balance. In addition, these simulations make it possible to estimate the time needed to complete a production cycle, to define potential bottlenecks at each step and, above all, to define the necessary equipment and their sizing in order to produce 10kg/day of battery active material.
In parallel with the process simulations, WP6 research team compiled an equipment inventory to assess the potential use of the facilities currently available at JGI-HYDROMETAL (BE), as part of the RHINOCEROS project. This timely inventory will help the partners to identify the additional equipment requirements necessary to properly equip the pilot plant for the scale-up process. Work is underway to best prepare the construction of the future pilot.
Author: KIT
During the third semester, researchers from KIT further studied and improved the conditions for the mechanochemical transformation of black mass (BM) into metallic black mass (MBM). Since BM supplied by ACC is already in a reduced state, they focused on reducing BM supplied by TES. This BM consists mostly of NMC (lithium nickel manganese cobalt oxides) cathode material and graphite, which was found to slow down the reaction kinetics. The reduction of the cathode active material by the metallic reducing agent result in the formation of the transition metals along with lithium oxide (Li2O) and the oxide of the respective reducing agent, which can be monitored by X-ray diffraction.
In contrast to the previous two semesters, researchers switched from shaker mills to planetary mills, which enable control of the rotation speed and larger volumes that can be processed. Various parameters such as ball-to-sample ratio (BSR), ball size, total load and rotation speed were investigated to optimise for a short reaction time.
Main take-aways
In general, the higher the BSR, the more mechanical energy can be transferred per gram of powder which results in a more intense milling and a faster reaction; however, this limits the throughput. Larger balls, on the one hand, lead to higher kinetic energies. On the other hand, fewer balls are used to keep the BSR constant resulting in a lower collision frequency. The maximum rotation speed is lower to prevent damage to the grinding media.
With Calcium as the reducing agent, no reaction was achieved at all. An unfavorable combination of ductility and size of the calcium pieces seems to resist further size reduction, which is required for the reaction.
Aluminium has the advantage of being used as a current collector and is already present in the black mass. However, during the reaction, LiAlO2 is formed, which is limiting the subsequent Li extraction efficiency in WP5. This problem can be avoided when magnesium is used as the reducing agent, which proved to be more reactive than aluminium but doesn’t form other lithium compounds than Li2O.
Compared to the shaker mill, a higher reaction rate was observed in the planetary mill. Researcher from KIT achieved a complete conversion of the lithium transition metal oxide in the planetary mill within 3 h using Mg as the reducing agent. In a larger version of the mill, the required milling time increases to 8 hours. Here, further investigations are planned for the next months.
Read previous article on the pre-treatment operations: Pre-treatment operations: Reactive milling for the production of metallic black mass
© Photo: Adobe
Author: KIT
Following previous work performed in work package 5, researchers from KIT further investigated the lithium (Li) extraction from black mass (BM) supplied by partners ACCUREC (ACC) and TES.
The BM provided by ACC consists of graphite, as well as transition metals such as nickel (Ni), manganese (Mn), and cobalt (Co), along with their respective oxides and impurities like copper (Cu), iron (Fe) and few fluorinated compounds. Li is present in the form of lithium carbonate (Li2CO3), lithium fluoride (LiF) and lithium aluminium oxide (LiAlO2). However, breaking off lithium aluminium oxide to a soluble Li-salt and removing fluoride contamination proved to be challenging.
Previous work reported the simultaneous incorporation of fluoride ions and decomposition of LiAlO2 using an excess of calcium hydroxide (Ca(OH)2) at elevated temperatures. More recent developments of the processes show improvement, especially decreasing considerably the amount of of Ca(OH)2 , while achieving a Li extraction of 87 %. Instead of heating the suspension, it is possible to initiate the reaction by liquid-assisted grinding in a planetary mill. The results show LiAlO2 is decomposed. However, the fluoride content is not efficiently removed.
In the BM supplied by the partner TES, most Li is present as lithium transition metal oxides (LiTMO) and a small amount of LiF. To enable Li extraction, this BM was reduced by reactive milling in Task 4.4 – Reactive milling for the production of metallic black mass (MBM). The obtained MBM consists of graphite, the metallic composite, lithium oxide and the oxidised reducing agent, along with some impurities like Fe and fluorinated compounds.
After investigating aluminium (Al) and calcium (Ca) in the previous steps, researchers at KIT performed tests to assess Li extraction using a magnesium (Mg) system, which presents various advantages, namely: avoiding, on one hand, the formation of Li salts with bad solubility, and relying on the other hand on insolubility of Mg in the high pH aqueous solution.
After aqueous extraction, researchers obtained a mixture of Li2CO3 and LiF. In the upcoming months, this mixture will be purified to a battery-grade material.
During the past years, the increase in the use of lithium-ion batteries (LIBs) has become more prominent. An unsurprising trend, whatsoever, due to the widespread and rapid adoption of clean mobility applications, electronic devices, and energy storage systems. Despite their undeniable environmental and social benefits, several challenges lie ahead. In 2022, global lithium demand exceeded the supply despite an 180% increase, IEA reports. Recent communications already forecast the demand of lithium (Li) is expected to soar over the next decade, with mobility accounting for the main consuming market.
The current supply of primary resources is deemed insufficient for the growing demand. Approximately 60% of today’s lithium is mined for battery-related applications, a figure that could reach 95 percent by 2030, McKinsey reports estimate. But this rapid increase in the use of LIBs in EVs will introduce a large quantity of spent batteries in the near future. The alternatives to manage spent batteries include remanufacturing, repurposing and recycling, with the latter one playing a significant role from both ecologic and economic points of view.
Current recycling processes lack selectivity in recovery control and require significant consumption of reagents and energy. The research conducted by the RHINOCEROS partners at Sapienza University of Rome (UoS), Department of Chemistry, aims to develop an electrochemical process for selective extraction of Li from electrodic powder of end-of-life (EoL) LIBs. This concept simulates the charging process of a LIB with an aqueous electrolyte and a cathode material (counter electrode) that facilitates water reduction. The hydroxyls freed by water reduction and the Li + cations deintercalated by the anode will form a LiOH solution.
Using two samples – a commercial powder, respectively one coming from EoL LIBs, and testing the delithiation process using various parametres, UoS researchers obtained:
- Li extraction of 99% from commercial powder
- Li extraction of 82% from waste powder
The lower Li extraction on EoL electrode powders compared to commercial ones is due to the presence of SuperP [a high purity and structured carbon black powder with a moderate surface area for the lithium-ion industry], which oxidises under delithiation conditions.
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Europe stands at a turning point in its journey towards establishing a competitive European value chain for batteries. Important steps have been taken in encouraging battery manufacturing plants, only to mention here the inauguration of the first gigafactory by Northvolt in Sweden. Yet, the market demand for batteries continues to surge, fueled not only by the electric vehicle sector but also by other mobility applications and stationary storage needs. The recently launched Quarterly EU Electricity Market Report Q3 ’23 indicates over 600,000 new battery electric vehicles (BEVs) were registered in Q3 ’23, 36% higher than the corresponding quarter in 2022 and counting for 24% market share.
In response to these record demands, the European batteries research and innovation (R&I) community has been dedicated to supporting the establishment of this industrial value chain in Europe, aided by public funding, including by the European Union. Various R&I projects under the umbrella of the BATT4EU Partnership (established under Horizon Europe Programme in 2021), RHINOCEROS included, are sharing forces within the Cluster Hub “Production of materials for batteries from European resources” to address common challenges.
Motivated by the global geopolitical developments, the strategic role batteries play in achieving Green Deal objectives and the ever-evolving nature of battery technologies, Europe recognises the critical need for strategic alignment among stakeholders. Replacing the BATT4EU SRIA of 2021 and the Batteries Europe SRA of 2020, the 2024 SRIA outlines key strategic actions that the European Batteries R&I Community will undertake to advance collaborative research projects facilitated by the BATT4EU Partnership. Different from the previous strategic agendas, the 2024 roadmap goes beyond specific chemistries, leveraging also the power of disruptive (digital) technologies to advance research across all battery types, including material science, manufacturing and recycling processes.
The new agenda draws on the roadmaps published by Batteries Europe and Battery 2030+, compiling inputs from numerous European battery experts, offering recommendations on short, medium, and long-term objectives. It emphasises the need for coordinated action not only at the European level but also within national and regional programmes.
The 2024 SRIA points to the following six imperatives which are necessary to set the foundations and support a competitive battery value chain in Europe:
• Ensure that (BATT4EU) research results reach gigafactories and the markets, through pilots, demonstrators and improved decision making aided by digital tools.
• Increase the strategic autonomy of Europe by reducing the reliance on foreign critical raw materials by supporting local and circular supply chains and support research into different battery chemistries, including sodium-ion technologies.
• Improve battery affordability to accelerate the green transition and keep the European industry competitive by improving batteries based on materials that are more abundant and pushing for better integration into end-use applications.
• Improve the flexibility of battery manufacturing and recycling systems to reduce lock-in effects and respond quickly to changes in a rapidly developing industry.
• Implement a safe and sustainable by design framework for batteries, which plays to European strengths, and which will help reduce emissions and use of substances of concern, improve safety and allow for the integration of smart functionalities.
• Support the continuity of excellent European battery research and academic-industrial cooperation by improving access to research facilities and pilot lines, use research projects to build up a skilled workface, and by avoiding gaps in research through continued funding, which will bind talented researchers to Europe.
Interested in finding out more information about the recently released SRIA?
BATT4EU Partnership is organising a webinar on 20 March 2024, between 10:00 and 11:30 Brussels time. The aim is to present the official document and to host engaging discussions with the experts behind this publication who will explain how this document will redefine the dynamics for the European battery sector.
Register here
RHINOCEROS attending Shifting Economy Week
From 21 to 25 November 2023, the city of Brussels hosted the Shifting Economy Week, an annual event dedicated to showcasing transformative projects that aim to pave the way to an economy that is low-carbon, regenerative, and equally circular. The 2023 exhibitors’ line-up included, among other regional stakeholders, our partner Watt4Ever (W4E), industrial partner specialised in the development of innovative solutions for energy storage and management. W4E leveraged its presence at Shifting Economy Week to to raise awareness about the importance of circular economy principles in the context of the battery industry.
During the same event, W4E’s CEO, Aimilios Orfanos, was invited to speak at the BeCircular conference, an event dedicated to presenting concrete examples of circular economy approaches put in place by Brussels-based companies. He shared insights from W4E’s experience in developing second-life battery systems for electric vehicles, emphasising their potential benefits in terms of environmental impact and cost savings. Simultaneously, the CEO also highlighted the challenges faced by the industry in implementing circular business models, including regulatory barriers and market incentives.
RHINOCEROS at its second participation at Circular Wallonia Days
A few days after attending Shifting Economy Week, W4E represented the RHINOCEROS project at the Circular Wallonia Days, held on 13 and 14 December 2023. Centred around advancing the circularity of the batteries value chain, the event brought together stakeholders from academia, industry, and government to discuss strategies for improving the sustainability of battery production, use, and disposal. The focus topics covered recycling technologies, supply chain transparency, and policy measures to support the transition to a circular battery economy.
© Photo credits: Watt4Ever
Despite a different objective, the RHINOCEROS project partners have shown growing interest in the Digital Battery Passport, an initiative of FREE4LIB, a sister project from the Cluster Hub “Production of raw materials for batteries from European resources”. This collaboration shows our commitment to contributing to the European battery community through the exchange of knowledge and experience.
The FREE4LIB workshop had a three-fold objective, including a brief presentation of the preliminary results of the battery passport concept development, the outline of the implementation challenges and potential follow-ups of industrial scale-up, and the clear differentiation between battery second use (B2U) versus recycling. The event drew approximately 50 participants from various segments of the battery value chain, which ensured a comprehensive and multifaceted perspective of the subject matter.
The introductive session presented the FREE4LIB project, briefly highlighting past achievements and focusing mainly on the remaining activities outlined in the workplan. The following session was led by Julius Ott (industrial engineer with expertise in circular economy at Karl-Franzens-Universität Graz). During the past year, researchers at Univ. of Graz worked on finalising data collection and processing related to the development of a data model of the digital passport platform which aims to close the information gap between beginning-of-life (BoL) and end-of-life (EoL) battery lifetime. This interactive session turned out to be an appropriate opportunity for researchers at Univ. of Graz to present the outcomes of their data collection and handling, and to evaluate their relevance within the reality portrayed by the workshop attendees.
Participants, predominantly familiarised with the EU-funded battery projects, confirmed the findings reported by Univ. of Graz. However, they also raised concerns about data sharing. The outcomes of the interactive session, complementing prior research, will serve as valuable guidance for the FREE4LIB project in implementing the battery passport within their project.
For additional background information on the digital passport developed by FREE4LIB, please refer to previous articles.
