Recycling & Circularity Developed 2022 · C6 4 min Recording available on request

Circularity in EV Batteries

Circularity in EV batteries describes the shift from a linear make-use-discard model to one built on reuse, lifetime extension, and recycling of lithium-ion packs. As electric mobility scales, the industry must avoid overconsuming raw materials and creating waste, which makes closing the loop both an environmental and an economic priority. The challenge is that neither recycling nor second-life reuse is yet fully developed, so the path to a genuine circular economy remains under construction.

The Problem: A Young Industry Without Enough Volume

Because widespread electric mobility is recent, few EV batteries have reached the end of their first life, so there is not yet enough material to make large-scale recycling economically viable. The two main end-of-life options, recycling and second use, both face technical and commercial hurdles. A circular approach promises benefits beyond sustainability, including new recovery and recycling industries, jobs and skills, innovation and efficiency gains in primary supply, and the avoidance of harm from primary mining. Four circular business models are meant to co-exist across the full lifecycle: circular supplies, sharing platforms and common frameworks, lifetime extension, and recycling. A McKinsey estimate suggested second-life EV batteries could exceed 100 gigawatt hours a year by 2030, enough to meet about half the forecast demand for utility-scale storage that year.

Why Recycling Lithium-Ion Is Harder Than Lead-Acid

The contrast with lead-acid batteries is stark. A modern lead-acid battery can be recycled for more than 98 percent of its mass. Its design is simple, it is not built into modules or packs, and each unit weighs between 12 and 21 kilograms with lead making up over half the weight, so recovery is straightforward and profitable. Lithium-ion is different on every count. Even if all packs were recycled, only about 58 percent of the nickel, 47 percent of the cobalt, and 39 percent of the lithium could re-enter new materials, so fresh mining stays necessary. As of the study, only around 5 percent of lithium-ion batteries were recycled across Europe. Packs also vary enormously in construction. One example pack held 7,104 cylindrical cells, another used 192 pouch cells, and a third contained 96 prismatic cells. Cells are hermetically sealed and modules are often glued, which makes dismantling the largest barrier to efficient recovery.

Second Life and the Trade-Offs of Reuse

Reuse offers a way to delay recycling until it becomes profitable. Manufacturers typically recommend replacing an EV battery once its state of health falls to around 70 to 80 percent, roughly after eight years or 160,000 kilometres, because range suffers as capacity fades. Even so, the pack still holds enough energy for less demanding roles such as stationary energy storage systems. Requirements there are lower than in a vehicle, so the loss of power and capacity is often acceptable, and second life can extend usefulness by up to twenty years. That delay buys time for recycling to reach positive returns. The trade-offs are real, though. Some vehicle-grade features, such as high pre-charge capability, are not available in reused stationary packs, and assessing the health of used cells before redeployment adds cost and effort.

What It Means for the Industry

Two roadblocks stand out. First, there is no standard chemistry, cell, or module design, so the first and most important recycling step, dismantling, cannot be automated and remains highly labour intensive and expensive. The emerging cell-to-pack and cell-to-chassis trends make this worse, because the whole pack or chassis must be taken apart before smaller units can be processed. Second, there is no single global regulation, so companies chase differing regional targets rather than a shared goal. Original equipment manufacturers also guard intellectual property, which drives the variety of geometries and chemistries that frustrate standardised recycling. Europe is the most ambitious region on regulation, but whether technology and business deployment can meet its circularity targets on time is an open question. For circularity in EV batteries to work, design for disassembly, common standards, and coordinated policy will matter as much as recycling chemistry.

Key Takeaways

Circularity in EV batteries rests on four models: circular supplies, sharing platforms, lifetime extension, and recycling.

Too few EV batteries have reached end of life, so large-scale recycling is not yet economically viable.

Lead-acid batteries recycle at over 98 percent of mass, while only about 5 percent of lithium-ion batteries were recycled in Europe.

Even with full recycling, only 58 percent of nickel, 47 percent of cobalt, and 39 percent of lithium re-enter new materials.

Varied cell geometries, sealed cells, and glued modules make dismantling the biggest recycling barrier.

Second-life reuse in stationary storage can extend battery usefulness by up to twenty years and delay recycling.

The lack of standard designs and a single global regulation slows the move toward a closed loop.

Circularity in EV Batteries

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The Problem: A Young Industry Without Enough Volume

Why Recycling Lithium-Ion Is Harder Than Lead-Acid

Second Life and the Trade-Offs of Reuse

What It Means for the Industry

Key Takeaways

This is the public summary, the full case study lives inside the programme

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