The global shift to electric vehicles has created an urgent question: what happens to millions of battery packs when they reach the end of their useful life? Today, less than 5% of lithium-ion batteries are recycled globally, and most recycling processes recover only about 50% of the lithium content. The rest goes to waste, requiring ever more mining to feed the growing EV industry.
Researchers at a Japanese recycling facility in Tsuruga have now reported a breakthrough that could change that equation. Their method uses recovered lithium hydroxide instead of standard sodium hydroxide to process battery waste — a material known in the industry as black mass. This simple chemical substitution shifts the reaction chemistry, allowing far more lithium to be extracted from the spent battery material. Laboratory tests confirmed recovery rates approaching 90%, a figure that comfortably exceeds Japan's national target of 70% lithium recovery by 2030.
The significance of this advance extends beyond a single facility. Lithium is the most critical raw material in the EV supply chain, and its price has been extremely volatile, swinging dramatically in recent years. Higher recovery rates mean less dependence on mining, lower battery costs over the long term, and a smaller environmental footprint for the EV industry. The European Union has already set mandatory recycling targets: 50% lithium recovery by 2027 and 80% by 2031. Methods like Japan's new process suggest those targets are achievable with the right chemistry.
Other players are pursuing similar goals. Redwood Materials in the United States — founded by a former Tesla executive — has been scaling up its own recycling operations, and South Korean companies are investing heavily in battery recycling technology. But Japan's 90% result, confirmed by NHK World and validated in a working industrial facility rather than a laboratory, represents one of the highest recovery rates demonstrated at a practical scale.
Knowledge takeaway: Japan's new lithium recovery method uses recovered lithium hydroxide instead of sodium hydroxide to process black mass from spent EV batteries, achieving up to 90% recovery; conventional recycling methods typically recover less than 50% of lithium; Japan's government has set a 70% lithium recovery target by 2030, while the EU mandates 50% by 2027; higher lithium recovery reduces the need for mining and lowers the environmental footprint of the EV industry.