A recycling process developed at Japan’s Hirosaki University can recover roughly 90% of the lithium locked inside spent electric vehicle batteries, the university announced earlier this year. If the figure holds up at industrial scale, the method would already clear the toughest recycling standard on any nation’s books: the European Union’s requirement that battery recyclers reclaim 80% of lithium by the end of 2031.
The announcement landed as governments and automakers scramble to lock down supplies of lithium, cobalt, and nickel for the next generation of EVs. With millions of first-generation battery packs approaching end of life over the coming decade, the ability to pull high-purity lithium back out of dead cells is no longer a research curiosity. It is a strategic priority.
What Hirosaki University disclosed
The university described a chemical extraction method tailored to lithium-ion cells from electric vehicles. According to the disclosure, the process reclaims about 90% of the lithium contained in used packs. No peer-reviewed paper, independent audit, or detailed process flow sheet has been published alongside the announcement as of May 2026, so the number rests on institutional credibility rather than third-party verification.
That distinction matters. University press releases routinely present results in favorable terms, and bench-scale performance in metallurgical processing often drops when a method moves to a full production line. Equipment inefficiencies, contamination from mixed battery chemistries, and process interruptions can all erode recovery rates that looked strong in a controlled lab setting.
Still, Hirosaki is a nationally funded research university, and the claim is specific enough to be tested. Researchers elsewhere in the recycling field will be watching for follow-up data.
The EU standard it would beat
Europe’s Battery Regulation, formally adopted in 2023 as Regulation (EU) 2023/1542, sets staged lithium recovery targets for any company recycling batteries sold in the bloc. The first threshold, 50%, kicks in at the end of 2027. The second, 80%, takes effect at the end of 2031. These are not aspirational goals. They are enforceable obligations backed by potential market-access restrictions and penalties, as the Council of the European Union confirmed when it published the final text.
The regulation applies broadly, covering lithium recovered from consumer electronics, industrial storage systems, and EV packs alike. Its stated aims include cutting dependence on imported raw materials and preventing the rapid growth of the battery market from simply shifting environmental damage to mining regions outside Europe.
Those targets are already shaping research and investment decisions far from Brussels. JX, one of Japan’s largest metals and mining groups, has publicly cited the EU Battery Regulation as both a market driver and a performance benchmark for its own recycling work. The signal is clear: Japanese industry views the 80% threshold not as a ceiling but as a floor its technology should be able to beat.
How the process stacks up globally
Hirosaki’s 90% claim does not exist in a vacuum. Several commercial recyclers are already publishing recovery figures in the same range for certain metals, though lithium has historically been the hardest element to reclaim at high rates from spent cells.
Redwood Materials, the Nevada-based recycler founded by former Tesla executive JB Straubel, has said its hydrometallurgical process recovers more than 95% of nickel, cobalt, and copper, but the company’s publicly stated lithium recovery rates have been less specific. Li-Cycle, a Canadian firm with plants in North America and Europe, targets similar ranges for base metals while scaling up lithium recovery. In China, Brunp Recycling, a subsidiary of battery giant CATL, processes large volumes of spent cells but discloses limited granular data on element-by-element recovery.
What makes the Hirosaki result notable is the specificity of the lithium number. Lithium tends to disperse into slag or waste streams during pyrometallurgical (high-heat) recycling, which is why many smelter-based operations recover cobalt and nickel efficiently but lose a significant share of lithium. A hydrometallurgical or hybrid process that keeps lithium recovery at 90% would represent a meaningful technical edge, assuming it can handle the mix of cathode chemistries now on the road, including nickel-manganese-cobalt (NMC), lithium iron phosphate (LFP), and nickel-cobalt-aluminum (NCA) variants.
Unanswered questions
The biggest gap in the public record is scalability. No source reviewed as of May 2026 identifies a specific plant location, commercial operator, or production start date tied to the Hirosaki process. Whether JX or another industrial partner has licensed the technology for deployment remains unconfirmed. Technology transfer from a university lab to a working factory floor can take years, slowed by intellectual property negotiations, environmental permitting, and the engineering work needed to integrate a new process into existing recycling lines.
Cost is equally uncertain. Recovering 90% of lithium means little commercially if the economics do not pencil out. Virgin lithium prices have swung sharply over the past three years, and recycled material must compete on both price and purity. None of the available disclosures include cost-per-kilogram estimates, reagent consumption data, or energy-use figures for the Hirosaki method. If the process depends on expensive solvents or energy-intensive steps, strong technical performance alone may not be enough to attract industrial adoption.
Chemistry flexibility is a third open question. EV batteries arriving at recycling plants come from dozens of manufacturers, span multiple cathode chemistries, and vary widely in their state of degradation. A method optimized for one cell type may need significant adaptation for another. Commercial recyclers routinely deal with mixed-feed streams, and the Hirosaki team has not publicly addressed whether its process can handle that variability.
What to watch next
Three developments would move this story from promising lab result to proven industrial capability. First, a named commercial partner announcing plans to build or retrofit a facility around the Hirosaki process. Second, independently verified recovery data from that facility running real-world mixed battery waste. Third, published cost comparisons against both virgin lithium supply and rival recycling methods from competitors in South Korea, China, and Europe.
Additional markers worth tracking include lifecycle assessments that quantify greenhouse-gas savings relative to mining, and environmental permits that detail the process’s own waste streams and emissions.
For now, the 90% figure represents a credible technical demonstration from a respected Japanese university, not yet a proven industrial reality. But the gap it highlights is significant. The EU designed its 2031 lithium recovery target of 80% to be ambitious. If a university lab can already surpass it by ten percentage points, the regulation may end up functioning less as a stretch goal and more as a baseline that leading-edge recyclers comfortably exceed. That dynamic could accelerate investment across the sector and push regulators to tighten future targets once high-performance methods are validated at scale.
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*This article was researched with the help of AI, with human editors creating the final content.
