EVwire brief: Tesla has built its first Cybercab powered by cathode material made in-house, folding one of the most expensive and most Asia-dependent steps in battery manufacturing into the same Texas complex that builds the car.
Tesla's official Robotaxi account announced the milestone on X, crediting the car to what it called the first large-scale cathode plant in the Americas: Bonne Eggleston, Tesla's VP for its 4680 battery program, highlighted that this is just the first of many.
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The plant sits inside Gigafactory Texas in Austin, where Tesla mixes nickel, manganese, and cobalt precursor materials with lithium hydroxide, fires the blend in a kiln, and strips out magnetic impurities to produce the cathode active material for its 4680 cells. The cells power the Cybercab, Model Y, and Tesla Semi.
Tesla's official Tesla North America account confirmed in August that the facility was fully operational, calling it "the first large scale cathode production facility in North America." The company has also said it now produces both the anode and cathode for the 4680 using its dry-electrode process, a manufacturing method it has been refining since first unveiling the concept at Battery Day in 2020.
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Context:
Cathode material is one of the most expensive parts of a battery cell, with industry estimates putting it at more than 35% of total cell cost. For most of the EV industry, that material has been refined almost entirely in Asia. Owning that step domestically keeps a large chunk of a cell's cost inside Tesla rather than paying an external refiner for it.
Tesla's dry-coating process skips the solvent-based slurry step that the rest of the battery industry still relies on, and analysts tracking the technology's rollout estimate it could cut cathode costs by more than 18% on its own, with total battery cell costs potentially falling 20-30% once it's fully scaled across Tesla's 4680 lines.
Source: Bonne Eggleston and Robotaxi on X
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