Tesla has reached a new milestone in its battery supply chain strategy. On September 23, 2026, the company announced that the first Cybercab built with Tesla-produced cathode active materials had rolled off the production line at Gigafactory Texas.
The milestone marks an important step in Tesla’s efforts to bring more battery manufacturing processes in-house. By producing its own cathode materials for Tesla 4680 batteries, the company aims to reduce reliance on external suppliers, lower battery costs, and gain greater control over its 4680 battery supply chain.
Tesla Brings Cathode Material Production In-House at Giga Texas
Cathode active materials (CAM) are essential components of lithium-ion batteries and represent a significant portion of battery cell costs. For years, the global battery industry has relied heavily on Asian suppliers for these materials.
Tesla's decision to manufacture cathode materials in the United States is part of a broader effort to localize battery production and gain greater control over manufacturing costs and supply chain stability.
The company's cathode manufacturing facility is located within the Gigafactory Texas complex. Plans for the facility date back to 2022, when Tesla submitted permit applications and began moving forward with construction and investment.
However, the strategy started even earlier. During Tesla Battery Day in 2020, the company outlined plans to establish battery material production in North America while developing more efficient manufacturing methods to reduce costs and waste.
The production process involves combining nickel, manganese, and cobalt precursor materials with lithium hydroxide. The mixture then undergoes densification and high-temperature firing before specialized screening equipment removes magnetic impurities.
The resulting cathode active materials are used in battery cell manufacturing and have now made their way into a completed Tesla Cybercab.
This milestone demonstrates that Tesla's in-house cathode materials have progressed beyond material production and into vehicle manufacturing.
Dry Electrode Technology Could Cut 4680 Battery Costs by 20%–30%
Producing cathode materials in-house is only one part of Tesla's battery manufacturing strategy.
The company has also been advancing its dry electrode manufacturing process for 4680 battery cells. Tesla says it is now using dry electrode technology to manufacture both cathodes and anodes for its 4680 cells.
Unlike conventional wet electrode manufacturing, which relies on solvent-based slurries, dry electrode processing eliminates the need for solvent-based slurry preparation and handling.
This could simplify battery production, reduce manufacturing complexity, and lower costs.
According to industry estimates, Tesla's dry coating process could deliver cost reductions of more than 18%. If the technology is fully implemented across Tesla's 4680 production lines, total battery cell costs could potentially fall by 20%–30%.
The implications also extend beyond Cybercab.
Tesla's 4680 battery cells are used in vehicles including the Model Y and Tesla Semi, meaning improvements in materials production and electrode manufacturing could benefit multiple vehicle programs.
By combining in-house cathode production with dry electrode technology, Tesla is working toward a more integrated battery manufacturing system that could support higher production volumes at lower costs.
What Tesla's In-House Cathode Production Means for Its 4680 Batteries
Producing cathode materials in-house could help Tesla lower battery costs and reduce its reliance on external suppliers. Locating production closer to vehicle assembly plants could also cut transportation costs and reduce exposure to overseas supply chain disruptions.
Tesla says its in-house cathode manufacturing process improves greenhouse gas emissions efficiency by 74% compared with conventional Tier 1 suppliers.
Cybercab is a key application of Tesla's battery strategy. Designed for autonomous ride-hailing, the vehicle uses a structural battery pack with 4680 cells and a single-motor drivetrain. Tesla says Cybercab is nearly 40% more energy-efficient than the Model Y. The company also says its fully automated drive unit production line can assemble one unit every 10 seconds.
The benefits of this approach could extend to other vehicles that use 4680 cells, including the Model Y and Tesla Semi. However, Tesla still relies on external suppliers for some upstream raw materials, including metals sourced from mines and chemical processing facilities.
Frequently Asked Questions
Q1：Dry Electrode vs. Wet Electrode Manufacturing
Traditional lithium-ion battery manufacturing commonly uses a wet electrode coating process.
This involves mixing active materials with solvents to create a slurry, coating the mixture onto metal foil, and drying the coated electrodes.
Tesla's dry electrode approach eliminates the need for conventional solvent-based slurry preparation and drying.
The differences are significant:
Manufacturing Factor |
Wet Electrode Process |
Dry Electrode Process |
|---|---|---|
Coating method |
Solvent-based slurry |
Dry material processing |
Solvent usage |
Required |
Conventional slurry solvents eliminated |
Electrode drying |
Energy-intensive drying required |
Solvent-drying stage eliminated |
Equipment requirements |
Includes drying and solvent-handling equipment |
Potentially simpler production equipment |
Manufacturing energy |
Higher energy demand from drying |
Potentially lower energy consumption |
Cost-saving potential |
Established manufacturing process |
Potential savings when fully scaled |
The key advantage is that dry electrode technology can eliminate energy-intensive drying and solvent-recovery processes.
This could reduce factory energy consumption, simplify equipment requirements, and lower production costs.
Q2：Which Tesla vehicles use 4680 batteries?
Tesla's 4680 battery cells are used in vehicles including the Model Y and Tesla Semi. The technology is also part of Cybercab's battery strategy. Improvements in cathode production and dry electrode manufacturing could help Tesla reduce battery costs across multiple vehicle programs.
Q3：How much could Tesla's dry electrode technology reduce 4680 battery costs?
Industry estimates suggest Tesla's dry coating process could reduce certain electrode manufacturing costs by more than 18%. If fully implemented across its 4680 battery production lines, the technology could potentially lower total battery cell costs by 20%–30%. Actual savings will depend on manufacturing yields, production efficiency, and the ability to scale the process.
Q4：What is a Tesla 4680 Battery Cell Structure Diagram?
Tesla's 4680 battery cell measures approximately 46 mm in diameter and 80 mm in height. Its key components include the cathode, anode, separator, electrolyte, current collectors, and cylindrical casing. The cell features a jelly roll structure and Tesla's tabless electrode design, which helps reduce internal resistance, improve thermal performance, and deliver power more efficiently.