Battery recycling could curb lithium mining demand by 2035

The transition to electric vehicles is driving a surge in lithium‑ion battery demand, prompting researchers to examine how recycling could ease future lithium supply constraints. A University of California, Davis study published in Nature Sustainability finds that robust recycling could cut the need for new lithium mines dramatically, especially around 2035 [1].

Key takeaways

• High‑demand scenarios project up to 85 new lithium mines by 2050; recycling could lower that to about 15 [1].
• Recycling’s impact peaks around 2035, when it can offset the most new mining activity [1].
• Redwood Materials raised over $1 billion to build U.S. recycling capacity, targeting 100 GWh of cathode material by 2025 [2].
• The company plans a 600‑acre facility in South Carolina to produce both cathode and anode copper foil, aiming for 500 GWh by 2030 [2].
• Global lithium demand rose 30 % from 2022 to 2023, underscoring the urgency of diversified supply sources [1].

Modeling demand and the recycling lever

The UC Davis team modeled three lithium sources—brine, rock, and clay—adding a fourth: recycled battery material, which remains costlier than mining today. Their scenarios show that under a high‑demand trajectory, the industry would need to open as many as 85 new lithium deposits by 2050. However, policies that promote smaller batteries and extensive recycling could slash that number to roughly 15 new mines [1]. The researchers emphasize that timing is critical: new mines must come online to feed a recycling loop, but the greatest reduction in mining occurs when recycling capacity peaks around 2035 [1].

Industry response: Redwood Materials expands U.S. capacity

Redwood Materials, a battery‑recycling startup founded by former Tesla CTO JB Straubel, is scaling domestic supply chains to meet the recycling potential highlighted by the study. In August 2023 the company secured a Series D round exceeding $1 billion, bringing its total equity capital to $2 billion [2]. Redwood plans to use the funds to finish its 175‑acre Sparks, Nevada facility, which will produce anode copper foil, and to develop a 600‑acre plant in Charleston, South Carolina, that will refine recycled material into both cathode active material and anode foil [2]. The firm projects 100 GWh of cathode material capacity by 2025—enough for one million EVs—and aims for 500 GWh by 2030, potentially powering five million EVs [2].

Why it matters

The combined insights from academic modeling and private‑sector investment illustrate a pivotal shift: recycling could become a cornerstone of lithium supply, reducing reliance on new mines that take a decade or more to develop. This has geopolitical implications, lessening dependence on regions where lithium extraction is concentrated, and environmental benefits by curbing the carbon and water footprints of fresh mining. As the U.S. bolsters domestic recycling capacity, the industry moves toward a more resilient, closed‑loop battery ecosystem, aligning with policy goals under the Reduction Act and broader climate objectives. Continued funding and supportive regulations will be essential to realize the projected recycling impact and to keep lithium supply in step with accelerating EV adoption.