12 Key Learnings on How to Recycle EV Batteries

The challenge facing automakers on how to recycle EV batteries can be summarized with these 12 key learnings.

EV Battery Recycling is the Wild West.
EV Battery Recycling is a Multidisciplinary Challenge.
EV Battery Recycling is dominated by Asia’s Black Mass Processing.
EV Battery Recycling needs local material recovery, cannot be shipping overseas for processing.
EV Battery Recycling is improving with LFP, lithium iron phosphate, recycling.
EV Battery Recycling is limited because of impurities and processes.
EV Battery Recycling is best when hydro and pyro are used together in the process.
EV Battery Recycling is ready for AI automation in sorting and disassembly of cell modules.
EV Battery Recycling is best with battery segregation practices to achieve the highest black mass purity.
EV Battery Recycling is not so simple when considering dry shredding vs wet shredding.
EV Battery Recycling needs caution when scaling from pilot program to commercial operation.
EV Battery Recycling is on a learning curve for everyone.

At several recent conferences, including the International Congress for Battery Recycling and The Battery Show, EV battery recycling continues to draw interest from not only EV battery engineers and manufacturers, but also industry experts and tech founders.

Over the past months, Electrification Academy has had the opportunity to speak with numerous experts and founders in the battery recycling industry. These conversations have been both eye-opening and thought-provoking on how to recycle electric vehicle batteries including lithium-ion batteries.

1. The ‘Wild West’ of Battery Recycling

The battery recycling sector in the US and Europe currently resembles the "Wild West" — an unstructured, rapidly evolving landscape. While a few major players are establishing themselves, the market remains far from consolidated. In Europe, mechanical recycling capacity has already expanded significantly — some even describe it as overcapacity.

However, hydrometallurgical processing is now emerging as a key bottleneck. This imbalance will likely shift as more end-of-life batteries enter the scrap market, highlighting the evolving nature of the sector. Many companies are innovating how to recycle electric vehicle batteries, which begins with the secure collection of used, aged, or end-of-life batteries, followed by their safe transportation to specialized facilities. There, the batteries undergo meticulous procedures, including, when necessary, controlled discharging and careful dismantling.

A core step in the EV battery recycling process is shredding the battery components to produce "black mass," the mixture of valuable materials like lithium, nickel, and cobalt. However, most of the advanced processing technologies required to refine black mass into battery-grade materials are currently concentrated in Asia. Today, black mass is often exported from Europe and the US to processing facilities in Asia rather than being refined domestically. This reliance on overseas processing presents a challenge for supply chain security and sustainability efforts.

Meanwhile, in the US, local mechanical shredding may still present an opportunity, particularly as a way to avoid costly transportation of hazardous materials across long distances. By processing batteries closer to their collection points, companies can reduce logistics costs and regulatory complexities while ensuring that valuable materials remain within the domestic supply chain.

Despite these advancements, the industry’s rapid evolution demands a strong regulatory framework to ensure safety, environmental protection, and fair competition. Standardization of processes and quality control measures will be crucial for establishing a stable and reliable battery recycling industry.

2. A Multidisciplinary Challenge: The Convergence of Expertise

Battery recycling is a complex endeavor that requires expertise from a wide range of disciplines. It’s a melting pot of power electronics, electrical engineering, chemistry, and physics. From electrical discharging and mechanical shredding to deep chemical decomposition, the industry demands a broad spectrum of knowledge. Electrical engineers are needed to design safe and efficient discharging systems. Chemists are crucial for developing effective hydrometallurgical processes. Physicists contribute to the understanding of material properties and process optimization. This multidisciplinary nature underscores the importance of collaboration and knowledge sharing within the industry. By fostering a culture of interdisciplinary collaboration, we can accelerate the development of innovative recycling solutions.

3. Asia Leads in EV Battery Recycling, Dominating Black Mass Processing

Asia, particularly China, has taken the lead in scaling EV battery recycling, driven by its vast EV market and strategic focus on resource security. Today, most of the world’s black mass — the material containing valuable metals like lithium, nickel, and cobalt — is processed in Asia, making it a key player in the global battery supply chain.

Although the US and Europe are expanding their recycling efforts, they still rely heavily on exporting black mass to Asia for final material recovery. This dependence creates both supply chain risks and sustainability challenges. Developing localized hydrometallurgical and refining capacity would help secure critical materials, reduce transportation-related emissions, and establish a more resilient battery ecosystem.

While China boasts numerous large-scale recycling facilities, scale alone does not solve all challenges. Some processes, such as electrolyte removal during mechanical recycling, vary in efficiency and environmental impact. The next phase of EV battery recycling must focus not just on capacity expansion but also on improving process quality, material recovery rates, and sustainability.

4. Building Local Material Recovery Capacity is Critical

The US and Europe face an urgent need to develop robust local material recovery infrastructure. Currently, a significant portion of "black mass" — the valuable material resulting from battery shredding — is shipped to South Korea or Indonesia for further processing. This reliance on overseas facilities creates vulnerabilities in the supply chain and undermines the goal of a circular economy. Furthermore, impending regulations in the US that could restrict black mass exports underscore the necessity of prioritizing local infrastructure development. A combination of pyro- and hydrometallurgical processes, tailored to specific battery chemistries, is essential for achieving domestic material recovery and reducing reliance on foreign entities.

Establishing local facilities capable of complete end-to-end battery recycling, from shredding to refined material extraction, would ensure domestic control over these vital resources, fostering economic growth and reducing reliance on foreign supply chains, especially for materials that largely originated there.

5. LFP Recycling is Gaining Traction

Lithium iron phosphate (LFP) batteries are becoming increasingly prevalent in the EV market, driven by their lower cost, longer cycle life, and improved safety characteristics. As a result, the demand for effective LFP recycling is rising rapidly. However, unlike nickel-manganese-cobalt (NMC) batteries, LFP batteries do not contain high-value metals like cobalt and nickel, making traditional recycling methods less financially attractive.

The key challenge for the industry is developing economically viable recycling processes that make LFP recycling a financially beneficial endeavor. This requires investment in specialized technologies that optimize material recovery while minimizing environmental impact. Ongoing research and innovation will be crucial in creating cost-effective solutions that support the circular economy and ensure LFP batteries are sustainably reintegrated into the supply chain.

6. Direct Recycling Has Its Limits

Direct recycling, which involves repairing or regenerating battery cells without extensive chemical processing, offers a promising pathway for reducing the environmental footprint of battery recycling. However, its application is currently limited, particularly for end-of-life batteries. Production scrap, which is relatively clean and uniform, is more amenable to direct recycling. End-of-life batteries, on the other hand, contain impurities and degradation products that complicate direct processing. Therefore, while direct recycling holds potential, it’s not a universal solution. Pyro- and hydrometallurgical processes remain essential for handling the diverse and complex composition of spent EV batteries.

7. Pyro- and Hydrometallurgy are Complementary, Not Competitive

The debate over pyro- versus hydrometallurgical recycling is often framed as a binary choice. However, the most effective approach lies in combining these technologies. Pyrometallurgy can be used for initial bulk material recovery, while hydrometallurgy can refine and purify the recovered materials to high purity levels. This integrated approach enhances process efficiency and maximizes material recovery. Furthermore, it allows for the processing of a wider range of battery chemistries, optimizing feedback, and ensuring flexibility and adaptability in a rapidly changing market.

8. AI and Automation Have Huge Potential: The Smart Solution to a Diverse Landscape

The battery ecosystem is a patchwork of diverse designs, with no clear trend towards standardization of packs, modules, or cells. This heterogeneity presents a significant challenge for recycling operations. Manual sorting and dismantling are not only inefficient but also pose safety risks due to the potential for electrical hazards and chemical exposure.

This is where AI and automation step in. AI-powered vision systems can analyze battery packs, identifying their type, condition, and chemical composition. Robotic arms, guided by AI algorithms, can then perform precise dismantling tasks, minimizing the risk of damage and maximizing material recovery. Furthermore, AI can optimize sorting processes, ensuring that batteries are directed to the most appropriate recycling streams. The implementation of AI and automation is not just about efficiency; it’s about building a safer and more sustainable recycling infrastructure.

9. Segregation is Key in Recycling: Maintaining Black Mass Quality

The quality of "black mass" — the valuable material resulting from battery shredding — is paramount for efficient material recovery. To maintain high-quality black mass, strict segregation of battery chemistries and applications is essential. Mixing LFP and NMC batteries, for example, can contaminate the recovered materials and reduce their value. Similarly, EV batteries, energy storage systems, and consumer electronics batteries should be processed in distinct batches. This segregation requires dedicated sorting lines and rigorous quality control measures. By implementing effective segregation strategies, recyclers can ensure that the recovered materials meet the stringent specifications for reuse in new batteries or other applications.

10. Dry vs. Wet Shredding — Not So Simple: Context Matters

The choice between dry and wet shredding is not as straightforward as it might seem. While dry shredding is often touted as the optimal choice for producing lower-impurity black mass, this isn’t always the case. Wet shredding, on the other hand, can offer advantages in terms of dust suppression and reduced fire risk. The decision should be made carefully, considering specific operational contexts, feedstock, and material outputs. Factors such as the type of battery being processed, the desired purity of the recovered materials, and the available infrastructure should all be taken into account. A thorough analysis of these factors is essential for selecting the most appropriate shredding method.

11. Scaling from Pilot to Commercial Needs Caution: Gradual Growth

Making the leap from pilot projects to full-scale commercial operations is a significant undertaking that shouldn’t be rushed. It’s critical to plan for small, scalable steps that allow for controlled growth and adaptability. Rushing into large-scale operations without adequate planning can lead to costly mistakes and operational inefficiencies.

Pilot projects provide valuable insights into the feasibility and performance of recycling technologies. By gradually scaling up operations, companies can refine their processes, optimize their equipment, and build a solid foundation for long-term success. Careful planning, coupled with a focus on incremental growth, is essential for ensuring the sustainable development of the battery recycling industry.

12. Every Solution Provider is on a Learning Curve: Embrace Iteration

The battery recycling industry is still in its nascent stages, and many companies building their first facilities are learning as they go. This steep learning curve is an inherent part of the process. It’s an iterative cycle of trial, error, and adaptation. Companies must be prepared to experiment, learn from their mistakes, and continuously improve their processes. Flexibility and adaptability are essential for navigating the challenges of this rapidly evolving industry. By embracing a culture of continuous learning and improvement, turnkey solution providers can accelerate the development of effective recycling technologies and practices.