As demand for clean energy, electric vehicles and digital technology grows, the materials inside our products are becoming increasingly valuable. Could the waste we already generate help secure the resources we will need tomorrow?
Imagine an old electric-vehicle battery or a retired solar panel. To most people, these are items at the end of their useful lives. But inside them are valuable materials that could help power the next generation of technologies.
Lithium, cobalt, nickel, copper and rare earth elements have become essential to many modern industries. They support everything from rechargeable batteries and wind turbines to electronics and electricity networks. Yet producing these materials often involves complex global supply chains, environmentally demanding extraction and reliance on a relatively small number of suppliers.
This creates an important question: Must we keep extracting more minerals from the ground, or can we recover more of what we have already taken?
Circular supply chains offer a promising answer. By designing products to last longer, collecting them after use, repairing them and recovering their materials, businesses can reduce waste while creating additional sources of valuable resources.
The idea is compelling, but the reality is more complex. Recycling cannot replace mining overnight, and not every material can be recovered economically. The real opportunity lies in building a system where fewer resources are wasted and the materials already in circulation work harder for longer.
Why critical minerals matter
Critical minerals are materials considered strategically important because of their economic value and the risks associated with their supply. The exact list differs between countries and changes as technologies, markets and geopolitical priorities evolve.
Lithium, cobalt, nickel and graphite are important to several battery technologies. Rare earth elements such as neodymium and dysprosium are used in some high-performance permanent magnets, including those found in certain wind turbines and electric vehicle motors. Copper is essential for electrical wiring, power grids and many renewable energy systems.
The challenge is not simply that these minerals may become scarce in the ground. Supply can also be disrupted by trade restrictions, political tensions, infrastructure constraints, concentrated refining capacity or sudden changes in demand.
A systematic review by Heydari and colleagues in 2025 examined 327 peer-reviewed studies on critical mineral supply chain resilience. It identified vulnerabilities across the supply chain, including processing bottlenecks, logistics and downstream dependencies. The review also highlighted that recycling is promising but faces practical and technical barriers.
These challenges matter because the energy transition itself requires substantial quantities of materials. If supply cannot expand reliably, the cost and pace of deploying technologies such as batteries, solar panels and electricity networks may be affected. Increasing mining and refining capacity is one response. Making better use of existing materials is another.
What is a circular supply chain?
Traditional supply chains often follow a largely linear pattern: extract raw materials, manufacture products, sell them, and discard them when they are no longer useful.
A circular supply chain aims to keep products and materials in use for as long as practical. Instead of treating an unwanted product as waste, it treats that product as a potential source of value.
This can happen at several levels. First, make products last longer. Repair, maintenance and upgrades can delay the need to manufacture replacements and extract additional materials. Second, reuse products and components. Equipment that no longer meets one user's needs may still be suitable for another application. Third, remanufacture and refurbish. Recovering functioning components can preserve more of a product's value than breaking it down into raw materials. Finally, recycle materials. When a product can no longer be used safely or effectively, specialised processes can recover materials for use in new products.
The order matters. Extending a product's life or reusing a component may preserve more of the value created during manufacturing than recycling alone. Recycling becomes especially important when products reach the end of their useful lives.
In their 2024 perspective, From Critical Raw Materials to Circular Raw Materials, van Gaalen and Slootweg argue for combining material reduction, substitution, improved recovery and circular product design. The implication is clear: circularity starts when a product is designed, not when it reaches a recycling facility.
Batteries: turning yesterday's products into tomorrow's resources
Electric vehicle batteries provide one of the clearest examples of how circular supply chains could help reduce dependence on newly mined minerals. As electric vehicles become more widespread, increasing numbers of batteries will eventually reach the end of their automotive lives. Depending on their condition, some may still be suitable for less demanding applications, while others can be sent for material recovery.
Recycling can recover valuable metals from battery waste and return them to manufacturing supply chains. This creates a potential source of materials that does not depend entirely on opening new mines.
Research published in Nature Communications in 2025 by Machala and colleagues compared industrial-scale lithium-ion battery recycling with conventional mining supply chains. The study found that converting mixed streams of end-of-life batteries into battery-grade materials reduced the environmental impacts assessed, including greenhouse gas emissions, energy use and water consumption, by at least 58% relative to the conventional supply chains used for comparison.
That is an encouraging result, but it should be interpreted carefully. It relates to the processes and environmental measures assessed in the study, rather than proving that every recycling operation will achieve the same reduction. The researchers also found that electricity consumption was a major contributor to recycling's environmental impacts. The source of that electricity can therefore make a substantial difference.
Recycling is not automatically sustainable just because it recovers valuable materials. Facilities need suitable technology, reliable electricity, safe handling practices and access to enough used batteries to operate effectively.
There is also a timing challenge. Demand for batteries can grow faster than end-of-life batteries become available, particularly while the vehicle fleet is still expanding. Recycled materials are therefore likely to complement newly mined materials for years to come. Even so, recovering more batteries can gradually create a valuable secondary source of supply and reduce the amount of material that must be obtained through primary extraction.
Solar panels and electronic waste: a wider opportunity
Batteries are only part of the picture. Solar panels have long working lives, which is an advantage for clean electricity generation. But as installations age, their materials must eventually be managed responsibly. Depending on the panel technology, some materials can be recovered, although collection and processing systems need to be developed to make that recovery effective at scale.
A 2025 study by Yuan and colleagues in Nature Communications modelled the potential role of recycled materials in global photovoltaic development. Its scenarios projected that the annual contribution of secondary materials to photovoltaic material supply could rise from 3.3% in 2020 to between 43.4% and 101.6% by 2050.
These figures are projections, not guaranteed outcomes. The range depends on assumptions about future deployment, waste generation, material recovery and technology pathways. In particular, a modelled supply ratio above 100% does not mean recycling will eliminate all mining. It indicates that projected secondary supply could exceed the modelled annual material demand under certain conditions, potentially leaving material available for other uses or future periods.
The broader lesson is that products installed today can become valuable material stocks in the future. Recovering those materials requires early planning for collection, sorting, recycling and traceability.
Electronic waste adds another opportunity. Phones, computers, circuit boards and other electrical equipment contain mixtures of metals, some of which are difficult or uneconomic to recover using conventional recycling systems. When discarded electronics are collected and processed appropriately, valuable materials can return to productive use rather than being lost in landfill or poorly managed waste streams.
However, a device containing a critical mineral does not guarantee that recovering it will be profitable. The concentration of the material, the complexity of the product and the cost of separating it all influence the result.
The business case: more than an environmental initiative
Circular supply chains can create value in several ways. First, they can provide an additional source of raw materials. Recovered metals may help manufacturers diversify supply and reduce exposure to certain disruptions in global markets. The extent of this benefit depends on the scale, quality and location of recovery operations. Second, circular practices can improve resource efficiency. Repairing, refurbishing and reusing products can preserve the energy, labour and materials already invested in their manufacture. Third, they can open new commercial opportunities. Businesses may develop repair services, remanufacturing operations, battery collection networks or specialised recycling facilities. Waste that once carried a disposal cost may become a feedstock with economic value. Fourth, circular systems can improve supply chain visibility. Knowing where products are located, what materials they contain and when they may become available for recovery can help companies make better long-term sourcing decisions.
But these benefits are not automatic. Recycling facilities require investment, and their economics depend on factors such as feedstock availability, recovered material prices, processing costs and regulatory requirements. Better collection systems, clear product information and stable demand for recycled materials can make projects more viable.
What stands in the way?
If circular supply chains are so promising, why have they not eliminated dependence on mining?
The first obstacle is collection. Materials cannot be recovered from products that never reach appropriate collection systems. Old electronics may remain in drawers, be exported through poorly documented channels or enter waste streams that cannot support efficient recovery.
The second obstacle is technical complexity. Products often contain multiple materials tightly joined together. Separating them without contamination or excessive losses can be difficult. Some materials are present in very small quantities, making recovery challenging even when the technology exists.
The third obstacle is time. Materials must first enter the economy, remain in use and eventually become available for collection. Rapidly growing industries may need more minerals today than recycling can supply.
There is also a wider resilience issue. A circular supply chain can still be vulnerable if collection, processing or refining is concentrated in one region. A 2025 study by Li and colleagues in iScience examined disruptions to scrap recycling during the COVID-19 pandemic and found that impacts differed across sectors, with labour-intensive recycling activities particularly affected. This illustrates why recycling capacity alone is not enough. A resilient system also needs robust logistics, suitable technology and contingency plans.
Finally, responsible management matters. Recycling must be carried out in ways that protect workers and communities and control pollution. Otherwise, some environmental and social burdens may simply move from mining sites to waste-processing locations.
How can businesses make circularity work?
Building effective circular supply chains requires coordinated action across product design, manufacturing, use and end-of-life management.
Manufacturers can design products to be easier to repair, disassemble and recycle. Clear information about material composition can help recovery operators identify what is present and choose appropriate processes.
Businesses can establish take-back schemes and work with reputable recycling partners, making it easier for customers to return products rather than discard them. They can also track material flows and measure how much recovered material actually re-enters production.
Governments have a role too. Consistent standards, effective waste collection systems, appropriate producer responsibilities and predictable policy frameworks can help create the conditions for long-term investment.
Most importantly, organisations should measure results rather than rely on broad sustainability claims. Useful indicators include collection rates, recovery yields, recycled content, material losses, energy use and the share of demand met through secondary materials. These measures reveal whether circularity is reducing dependence on primary resources in practice.
Conclusion: waste is a resource, but only if we build the loop
Can circular supply chains reduce our dependence on critical minerals? Yes, they can, but they are not a complete substitute for mining.
Repair, reuse longer product lives and effective recycling can reduce material losses, create alternative sources of supply and make some supply chains more resilient. Research on batteries and solar panels shows that the potential is substantial, although the benefits depend on technology, infrastructure, energy sources and future material flows.
The next step is to stop treating product disposal as the end of the story. A retired battery, an old solar panel or a discarded electronic device may contain materials that retain considerable value. Recovering that value requires thoughtful design, accessible collection systems, responsible processing and markets for the materials produced.
A genuinely circular economy will still need some primary extraction. But it can reduce unnecessary demand for new resources and make better use of the minerals already above ground. The opportunity is not simply to turn waste into wealth. It is to build supply chains that use resources more intelligently, withstand disruptions more effectively and support the transition to a lower-carbon economy.
In the long run, the most valuable mine may not always be the one we dig. It may also be the one we have already built into the products around us.
References and further reading
- Heydari, M., Mitchell, P., Cullen, L., Andrieu, B., Serrenho, A., & Cullen, J. M. (2025). A systematic review of resilience in the critical minerals supply chains, needed for the low-carbon energy transition. Renewable and Sustainable Energy Transition. DOI: 10.1016/j.rset.2025.100127.
- Machala, M., Chen, X., Bunke, S. P., Forbes, G., Yegizbay, A., de Chalendar, J. D., Azevedo, I. M. L., Benson, S., & Tarpeh, W. (2025). Life cycle comparison of industrial-scale lithium-ion battery recycling and mining supply chains. Nature Communications, 16. DOI: 10.1038/s41467-025-56063-x.
- Yuan, X., Song, Q., Liu, Y., Huang, M., Wang, Y., & Xu, Z. (2025). Role of anthropogenic mineral circularity in addressing dual challenges of resource supply and waste management in global photovoltaic development. Nature Communications, 16. DOI: 10.1038/s41467-025-64145-z.
- van Gaalen, J. M., & Slootweg, J. (2024). From Critical Raw Materials to Circular Raw Materials. ChemSusChem, 18. DOI: 10.1002/cssc.202401170.
- Li, X., Chen, X.-Z., Zhu, J., Zhang, P., Shi, H., & Chertow, M. R. (2025). Resilience of the circular economy to global disruptions in scrap recycling. iScience, 28. DOI: 10.1016/j.isci.2024.111713.