A rulebook designed to measure the environmental performance of batteries in Europe could soon influence how batteries are produced, documented and sold around the world, according to a Policy Article published in Science. Researchers say the European Union’s Batteries Regulation may extend the reach of European sustainability standards far beyond the bloc, creating what they describe as a new “Brussels Effect” for battery sustainability. The term refers to the way European rules can become global de facto standards when companies outside the EU adopt them in order to retain access to the region’s large and influential market. In the battery industry, that influence could affect everything from mining and refining to manufacturing, recycling and the way environmental claims are verified.
The regulation is significant because it does not focus solely on whether a battery is produced using cleaner energy or contains recycled materials. It also requires companies to generate and provide evidence about those claims. Batteries placed on the European market will increasingly be judged through detailed information about life-cycle greenhouse-gas emissions, the circularity of materials and the responsible sourcing of raw materials. Such requirements move sustainability from a broad corporate promise into a technical system of measurement, reporting and verification. Manufacturers and suppliers must be able to demonstrate where materials came from, how much carbon dioxide and other greenhouse gases were emitted during production, how components move through supply chains and what happens to the battery at the end of its useful life.
Yanan Liang and colleagues examine how these evidence requirements could spread internationally, arguing that the global consequences may be as important as the rules themselves. The researchers identify two main pathways. The first is compliance-driven diffusion through supply chains. A battery producer outside Europe may follow EU procedures not because its own government requires them, but because an automaker, cell manufacturer or materials supplier wants to sell products in Europe. Once a major company demands compatible data from its suppliers, those requirements can travel through several layers of an international production network. A mining company, chemical processor or recycling facility may therefore find itself collecting information according to European expectations even when its operations are located thousands of kilometers from the EU.
The second pathway is voluntary alignment. International standards organizations, certification bodies and regulators in other countries may adopt approaches resembling the European model because common rules can make trade, auditing and environmental comparisons easier. European requirements can provide a template for national policies or private-sector standards, particularly when governments are seeking to regulate fast-growing battery markets. This process does not require the EU to impose its rules directly. Instead, the rules can gain authority through their use by global companies, auditors and institutions that regard them as a credible baseline. Over time, similar methods may become embedded in contracts, certification systems and reporting frameworks across the industry.
The researchers emphasize that evidence-based regulation can deliver major benefits. Detailed documentation can make environmental claims more transparent and expose hidden emissions or unsustainable practices that are difficult to identify through broad labels alone. Life-cycle assessment, for example, evaluates emissions across multiple stages rather than examining only the factory where a battery cell is assembled. It can include mining, transport, chemical conversion, electrode production, cell manufacturing, use and recycling. Material-circularity requirements can encourage manufacturers to design batteries and recovery systems that retain valuable metals in the industrial cycle. Responsible-sourcing rules can also push companies to investigate labor, environmental and governance risks linked to minerals such as lithium, nickel, cobalt, manganese and graphite.
But applying one region’s evidence system to a globally distributed industry is technically and politically complicated. Battery supply chains cross jurisdictions with different laws, reporting cultures, infrastructure and levels of scientific capacity. Companies may use different boundaries when calculating life-cycle emissions, for example by deciding whether to include capital equipment, indirect electricity impacts, transport stages or the treatment of recycled materials. Two assessments can therefore produce different results even when they describe similar products. Variations in electricity-grid data, mining records, production efficiencies and recycling assumptions can make comparisons uncertain. A number reported with high precision may still depend on incomplete or incompatible underlying information.
Verification creates another layer of difficulty. Environmental data can be checked by independent auditors, certification programs, government agencies or digital tracking systems, but these mechanisms do not have equal authority or technical capability in every country. A small supplier may lack the resources to conduct repeated audits or install sophisticated monitoring equipment. A large manufacturer may hold extensive proprietary data that cannot easily be shared across borders. In some supply chains, information is passed through multiple intermediaries, increasing the risk of duplication, omissions or inconsistent accounting. If European requirements are applied rigidly without recognizing these differences, the system could improve credibility for well-resourced companies while excluding smaller producers or regions that lack access to approved verification services.
Liang and colleagues therefore propose a phased strategy to manage the global expansion of battery sustainability rules. The first stage would focus on methodological reconciliation, bringing different approaches to life-cycle assessment, emissions accounting and circularity measurement into closer agreement. This does not necessarily mean imposing a single formula immediately. Instead, regulators and standards bodies could identify where methods genuinely differ, establish common definitions and improve the ability to translate results between systems. Better alignment would help companies and authorities distinguish real environmental differences from discrepancies caused only by accounting choices.
The second stage would involve flexible, risk-based verification. Rather than subjecting every material, supplier and production site to identical scrutiny, verification intensity could reflect the environmental and social risks associated with a particular activity, as well as the reliability of available data. High-risk minerals or facilities with major emissions could receive more extensive independent review, while lower-risk operations with strong records might use streamlined procedures. Such an approach could preserve regulatory rigor without creating an unmanageable burden for every participant in the supply chain. It could also direct limited auditing capacity toward the places where inaccurate or misleading claims would have the greatest consequences.
The researchers’ final recommendation is shared governance of datasets. Battery sustainability depends on data generated by companies, governments, researchers, auditors and standards organizations, yet those groups do not always use compatible systems or agree on who should control the information. Shared governance could establish rules for data quality, access, confidentiality, updates and dispute resolution. Digital product passports and other traceability tools may help connect information about a battery’s materials and environmental footprint across its life cycle, but technology alone cannot guarantee accuracy. The global battery market is expanding as electric vehicles and energy-storage systems grow, making the stakes unusually high. If the EU succeeds in linking market access to verifiable environmental performance, its model could accelerate cleaner production worldwide. If the underlying methods remain fragmented, however, the Brussels Effect could spread not one coherent standard but a patchwork of regional demands, raising costs and weakening confidence in sustainability claims.
Subject of Research: The international influence of the European Union’s battery sustainability rules, including life-cycle greenhouse-gas emissions, material circularity, responsible sourcing, data systems and verification.
Article Title: A Brussels Effect for battery sustainability
Web References: https://doi.org/10.1126/science.aed8133
References: Liang, Yanan, et al. “A Brussels Effect for battery sustainability.” Science. DOI: 10.1126/science.aed8133.
Keywords: battery sustainability, European Union Batteries Regulation, Brussels Effect, life-cycle assessment, greenhouse-gas emissions, material circularity, responsible sourcing, supply chains, environmental verification, battery recycling, sustainability data, electric vehicles
