Tesla has confirmed that it is now producing both electrodes of its 4680 battery cell using a fully dry-electrode process at Gigafactory Texas — a milestone that the company spent approximately eight years working toward. The disclosure, made in Tesla’s Q4/FY 2025 investor update, marks the first time any automaker has achieved scaled dry-electrode production for both anode and cathode of a production EV battery cell. The financial and technical implications for battery manufacturing are significant, though the full impact will take several years to appear in cost structures and vehicle pricing.
By the Numbers: Tesla’s Dry Electrode 4680 at a Glance
- ~8 years of development from the Maxwell Technologies acquisition (completed May 2019) to confirmed full dual-electrode production (January 2026)
- ~$235M: Tesla’s acquisition cost for Maxwell Technologies in May 2019
- 3 roller compression passes needed in Tesla’s optimized process vs. 10+ in traditional approaches — a 3x throughput improvement
- ~1–2 wt% PTFE binder content in dry electrodes vs. higher binder loads in wet-process cells; active material fraction reaches 97–98%
- ~90% capacity retention after 2,000 charge-discharge cycles, equivalent to approximately 600,000 miles of EV driving
- Studies suggest electrode production cost reductions approaching 50% once dry coating is fully scaled; industry estimates put achievable vehicle battery cost savings at 20–30%
- A dry cathode alone could reduce cathode costs by >18% and cut equipment investment by 41% compared to a wet process
- Tesla Battery Day 2020 target: 56% reduction in cost per kWh
- University of Chicago research indicates a 21.8% energy density gain at 4.55V vs. 4.2V is achievable using dry electrode technology; current 4680 useable energy density is approximately 260 Wh/kg, with a long-term potential approaching 340 Wh/kg
- LG Energy Solution is the nearest competitor, but targets full-scale dry coating production no earlier than 2028
From Maxwell Technologies to Gigafactory Texas
The story of Tesla’s dry electrode process begins not inside Tesla, but with a San Diego company called Maxwell Technologies. Tesla announced a definitive merger agreement with Maxwell on February 4, 2019, and completed the acquisition on May 16, 2019, for approximately $235 million in stock. Maxwell was a specialist in energy storage and ultracapacitors, but what Tesla wanted was something more specific: its dry-electrode coating patents and know-how.
In July 2021, Tesla sold Maxwell’s ultracapacitor business to UCAP Power — keeping the dry electrode intellectual property for itself. That decision made clear what Tesla’s intent was from the start: it was never about capacitors. It was about finding a way to manufacture battery electrodes without solvents, ovens, or the costly infrastructure that conventional wet-slurry processing demands. Tesla went to work applying Maxwell’s base technology to its 4680 cylindrical cell program, first demonstrated at the company’s Battery Day event in September 2020.
For several years after Battery Day, progress was slow and frustrating. The dry process worked reasonably well for the anode, and Tesla’s Cybertruck batteries used a hybrid configuration — dry-coated anode, wet-coated cathode — as an interim solution. The cathode remained the hard problem. Cathode materials are chemically reactive and mechanically fragile, and early dry-coating attempts produced films that cracked or delaminated under the compression required to form a usable electrode. Reports cited scrap rates and equipment reliability issues that repeatedly delayed the commercial rollout. Scaling from pilot lines at Tesla’s Kato Road facility to full commercial equipment at Gigafactory Texas exposed problems that were not apparent at smaller scale.
Both Electrodes, Now in Production
Tesla disclosed the breakthrough in its Q4 and FY 2025 investor update letter, released in conjunction with its earnings call on January 28, 2026. The announcement was direct: the company is now producing 4680 cells with both the anode and cathode manufactured using its dry-electrode process, at Gigafactory Texas in Austin. Bonne Eggleston, Tesla’s Vice President of 4680 Batteries, reinforced the disclosure with a post on X: “both electrodes use our dry process.” CEO Elon Musk added his own note, calling it “incredibly difficult” to achieve at scale and expressing pride in the engineering, production, and supply chain teams that made it possible.
The cathode breakthrough came down to a reformulated binder system and process optimization. Tesla’s recently published patent (US 2025/0364562) describes a composite binder combining PTFE (polytetrafluoroethylene, also known as Teflon) with PVDF or polyethylene, processed through high-shear jet milling. This treatment causes the PTFE to fibrillate — forming a microscopic “spider web” fiber network that binds electrode particles together without solvents. The result is a free-standing film that can be laminated directly onto current collector foil. A critical operational improvement: Tesla’s optimized process achieves target electrode density in just 3 roller compression passes, compared to 10 or more required in traditional approaches, tripling production throughput on the cathode line.
The initial deployment is measured. Tesla is producing 4680 battery packs for “certain Model Y vehicles” at its Austin facility. The language is deliberate — Tesla is validating the cells in real-world conditions before expanding to its full production run. Battery packs for the Cybertruck previously relied on the hybrid anode-dry/cathode-wet configuration; the transition to a fully dry process for both vehicles will occur as the new production line ramps. The broader rollout of fully dry-electrode Model Y variants is expected to expand throughout 2026.
What This Process Change Actually Does
The core advantage of dry electrode manufacturing is the elimination of an entire process block, not just a marginal improvement to an existing one. Conventional wet-slurry electrode production dissolves active materials, conductive carbon, and binder into a solvent (typically NMP), coats the slurry onto metal foil, then runs that foil through drying ovens that can stretch 100 meters in length. Those ovens must then be ventilated, and the NMP solvent must be captured and recovered — all of which requires capital, energy, floor space, and time. Tesla’s dry process removes the slurry tank, the ovens, and the solvent recovery system entirely.
The manufacturing economics shift as a result. Studies of dry coating technology suggest potential cost reductions approaching 50% for electrode production lines at full scale. Analysis of dry cathode processing alone indicates cost reductions exceeding 18% for cathode electrode costs and capital equipment investment reductions of around 41% compared to wet-process lines. The PTFE binder content drops to approximately 1–2 wt%, versus higher loadings in wet-process electrodes, which means active material fractions reach 97–98% — reducing “dead weight” in the cell and improving volumetric energy density. Thicker electrodes can be formed without the binder segregation that occurs as a wet film dries, which also supports better fast-charge performance.
The performance data cited in Tesla’s patent documentation and testing is also notable. Cells produced with the dry process retain approximately 90% of initial capacity after 2,000 full charge-discharge cycles. For a vehicle with 300 miles of range, that translates to roughly 600,000 miles before reaching 90% of original capacity — a durability ceiling most owners will never reach. A University of Chicago research paper published in early 2026 identified a cathode design that could deliver a 21.8% increase in energy density at a 4.55V cutoff voltage compared to a standard 4.2V cutoff, with the catch that Tesla’s dry electrode process is currently the only known manufacturing method capable of making it work at commercial scale. Analysts tracking the 4680 program estimate the current cell’s useable energy density at approximately 260 Wh/kg, with a long-term trajectory potentially reaching 340 Wh/kg as anode and cathode improvements accumulate.
The Competitive Picture: Tesla’s Head Start and Who Is Following
Tesla’s fully dry 4680 is not a technology that competitors are ignoring — but it is one they have not yet replicated at production scale. LG Energy Solution has been piloting dry electrode technology and is targeting full-scale production in 2028, making it the nearest rival. Samsung SDI is developing its own dry coating process for 46-series cylindrical cells. Volkswagen, through its battery subsidiary PowerCo, announced a partnership with printing machine specialist Koenig & Bauer to develop a dry coating process for its European and North American cell plants. VW projects that dry coating will reduce energy consumption in its battery factories by approximately 30% and shrink the factory floor space needed for electrode production by 15%. China’s CATL and BYD are both investing in dry electrode technology as well, though neither has confirmed a production timeline.
The significance of Tesla’s lead is not only technical. The company noted in its Q4/FY 2025 update that the fully dry 4680 now allows it to manufacture both cathode and anode materials in-house at Gigafactory Texas, without importing partially processed electrode components. For a company with global ambitions across terawatt-hour scale deployment, that matters both for cost control and supply chain independence. Analysts have noted that Tesla’s dry process gives it a meaningful alternative to the Chinese battery supply chain that most of the global EV industry depends on today.
Industry investment in the process space is also accelerating. On March 19, 2026, Matthews Engineering (NASDAQ: MATW) and hs-tumbler GmbH announced a joint cooperation to advance trajectory mixing technologies for dry battery electrode manufacturing, combining precision calendering expertise with hs-tumbler’s mixing process. Early development work showed that trajectory-mixed dry electrode powders can support higher calender throughput at elevated line speeds while maintaining electrode quality — suggesting the supplier ecosystem is maturing around Tesla’s pioneering work.
What’s Next: 2026 Is the Ramp Year, But 2027–2028 Is When It Counts
Tesla has cleared the most technically difficult hurdle, but production volumes for fully dry 4680 cells are still building. The current rollout — covering “certain Model Y vehicles” at Gigafactory Texas — is the opening phase of a much longer scaling effort. Industry analysts following the 4680 program closely expect that most dry-electrode production capacity will spin up during 2026, with the financial results of that ramp beginning to appear in Tesla’s reporting during 2027. The year 2028 is when dry electrode production is expected to become a decisive factor in Tesla’s cost structure and margins.
For the battery industry more broadly, what Tesla has demonstrated is that dry electrode manufacturing is not a theoretical concept or a laboratory curiosity. It is a production reality at one of the world’s largest EV factories. That proof point will accelerate investment and development at competing companies, compress their timelines where possible, and push equipment suppliers to build the tools needed to replicate the process. The competitive window Tesla holds today will narrow over time — but it is real, and the lead will not close quickly given the years of iterative work required to get to this point.
The longer-term opportunity is what makes this moment genuinely interesting for the battery sector. Once dry electrode manufacturing is stable and scaled, it opens the path to thicker, higher-capacity electrodes, advanced cathode chemistries that cannot survive wet-process conditions, and cell designs that use active material fractions well above what conventional processing allows. Tesla’s battery team has indicated that with the dry process now in place for both electrodes, it can turn its attention to what the patent portfolio holds for energy density, charging speed, and cycle life improvements. That next phase of development is where the real gains for consumers and fleet operators may ultimately arrive.
Bottom Line
Tesla’s confirmation that its 4680 cells are now produced with both electrodes manufactured via a dry process is one of the most tangible battery manufacturing milestones in the EV industry’s recent history. It took eight years, cost significant capital and engineering effort, and required solving a cathode cracking problem that stumped the program for years. The reward is a production process that eliminates the most expensive, space-intensive, and energy-demanding steps in electrode manufacturing — with the potential to reduce electrode production costs by up to 50% and deliver cycle life of 90% capacity after 2,000 cycles. Tesla is the only company doing this at commercial scale today. The rest of the industry is watching, learning, and working to close the gap. How fast they can do so will define battery manufacturing competition through the rest of this decade.
