Big Oil Bets on Toyota to Win the Solid-State Battery Race with New Factory | Taha Abbasi

Taha Abbasi has been watching the solid-state battery race with keen interest, and the latest development is a game-changer: Toyota and Japanese oil giant Idemitsu Kosan are moving beyond their pilot program to build a dedicated factory for solid electrolyte production. This partnership between the world’s largest automaker and one of Japan’s biggest oil companies represents a fascinating convergence — the old energy economy literally manufacturing the components of the new one.

Why an Oil Company Is Building EV Batteries

The Toyota-Idemitsu partnership, which began in October 2023, focuses on sulfide solid electrolytes — a material class considered the most promising path to mass-producing solid-state batteries. The reason an oil refiner is involved is brilliantly pragmatic: companies like Idemitsu Kosan sit on massive sulfur streams produced during fuel desulfurization. Converting that low-value byproduct into high-margin lithium sulfide could be a once-in-a-generation business transformation.

As Taha Abbasi points out, this is reminiscent of how gasoline itself was once just a cheap byproduct of kerosene production before Henry Ford’s Model T turned it into the cornerstone of 20th-century transportation. Idemitsu Kosan’s CEO Shunichi Kito captured this perfectly: “We discovered the usefulness of sulfur components in the mid-1990s, and through our research and technological capabilities cultivated over many years, we have succeeded in creating a solid electrolyte. This solid electrolyte is about to open up a new future for mobility.”

The Promise of Solid-State Batteries

Solid-state batteries replace the liquid electrolyte in conventional lithium-ion cells with a solid material. The advantages are substantial: higher energy density (meaning more range per kilogram), faster charging, improved safety (no flammable liquid electrolyte), and longer cycle life. Toyota’s roadmap targets a battery-electric vehicle with 1,000 km (620 miles) of range and 10-80% charging in about 10 minutes by 2027-2028.

If those numbers hold in production — and that’s still a significant “if” — solid-state batteries would effectively eliminate the two biggest objections to EV adoption: range anxiety and charging time. A 620-mile range exceeds virtually every ICE vehicle on the road, and a 10-minute fast charge approaches the convenience of a gas station stop.

The Competitive Landscape

Toyota isn’t alone in the solid-state race. Samsung SDI, QuantumScape, and Solid Power are all pursuing their own approaches. BYD recently hit a solid-state milestone with batteries potentially shipping as early as 2027. What distinguishes the Toyota-Idemitsu approach is the combination of sulfide electrolyte expertise, manufacturing scale from both partners, and Toyota’s willingness to invest in dedicated factory infrastructure rather than just lab-scale demonstrations.

Taha Abbasi notes that the factory commitment is the critical signal here. Many solid-state battery companies have demonstrated impressive lab results but stumbled on the manufacturing challenge. Building a dedicated factory for solid electrolyte production suggests Toyota and Idemitsu have solved — or believe they’ve solved — enough of the manufacturing problems to justify capital expenditure at scale.

What This Means for Tesla and the EV Market

Tesla has notably taken a different approach to battery technology, focusing on improvements to conventional lithium-ion chemistry through its 4680 cell format and dry electrode coating process. Elon Musk has been publicly skeptical of solid-state battery timelines, arguing that the manufacturing challenges are harder than proponents admit.

If Toyota delivers a production solid-state battery by 2028, it could significantly alter the competitive landscape. Toyota has massive manufacturing capacity and a global dealer network — two advantages that could allow rapid deployment once the technology is ready. A Toyota EV with 620 miles of range and 10-minute charging would be a compelling alternative to anything currently on the market.

However, as Taha Abbasi cautions from years of experience in technology development, the gap between factory groundbreaking and reliable mass production is where most battery breakthroughs stumble. Sulfide solid electrolytes are sensitive to moisture and require specialized manufacturing conditions. Scaling from pilot line to factory floor introduces challenges that don’t show up in lab demonstrations.

The Bigger Picture: Energy Industry Transformation

Perhaps the most fascinating aspect of this story is what it represents about the energy transition itself. An oil company investing in EV battery materials isn’t a contradiction — it’s evolution. The smartest fossil fuel companies are positioning themselves to profit from electrification rather than be destroyed by it. Idemitsu Kosan is essentially converting its petrochemical expertise into clean energy technology manufacturing.

This kind of cross-industry transformation is exactly what Taha Abbasi advocates for in the applied frontier tech space: taking existing industrial capabilities and redirecting them toward emerging technologies. The infrastructure, expertise, and supply chains built by the fossil fuel industry don’t have to be abandoned — they can be repurposed.

About the Author: Taha Abbasi is a technology executive, CTO, and applied frontier tech builder. Read more on Grokpedia | YouTube: The Brown Cowboy | tahaabbasi.com