Toyota is advancing sulphide solid-state battery technology with an energy density of 450–500 Wh/kg. With ultra-fast charging, these batteries can provide a 1,200 km driving range in just 10 minutes. Mass production is planned for 2027, initially targeting high-end Lexus models, in collaboration with Sumitomo Metal Mining and Idemitsu Kosan to overcome material and cost challenges.
How Does Toyota’s Sulphide Solid-State Battery Work?
Toyota’s solid-state batteries use a sulphide electrolyte route, achieving higher energy density than current ternary lithium-ion batteries. Advanced cathode materials, developed jointly with Sumitomo Metal Mining, reduce material degradation and ensure over 90% capacity retention after 2,000 cycles. Fast charging is enabled via an 800 V high-voltage platform, offering up to four times faster charging than conventional systems.
What Is the Mass Production Timeline?
2026: Small-scale production begins in Japan, focusing on prototyping and resolving technical bottlenecks.
2027: Full-scale mass production starts, with batteries first installed in Lexus flagship vehicles.
2028: Broader commercialization expected for additional EV models as production costs decline.
2030: Solid-state battery prices projected to fall to 1.5× the cost of conventional lithium-ion batteries, enabling mid-range vehicle adoption.
Which Companies Are Collaborating with Toyota?
Sumitomo Metal Mining: Co-develops high-durability cathode materials.
Idemitsu Kosan: Co-invests in lithium sulphide production facilities.
Prime Planet Energy & Solutions (Panasonic subsidiary): Supports battery production integration.
These collaborations aim to scale up production while resolving cost and material stability challenges.
How Does Toyota’s Solid-State Battery Compare to Conventional Li-ion?
| Feature | Toyota Solid-State | Traditional Li-ion |
|---|---|---|
| Energy Density | 450–500 Wh/kg | 250–300 Wh/kg |
| Charge Time | 0–80% in 10 min | 30–60 min (80%) |
| Cycle Life | 2,000+ cycles | 1,000–3,000 cycles |
| Lifespan | 15+ years | 8–10 years |
| Safety | No flammable liquid electrolytes | Thermal runaway risk |
| Platform Voltage | 800 V | 400–600 V |
What Are the Strategic Advantages?
Extended driving range: Eliminates “range anxiety” for high-end customers.
Ultra-fast charging: Supports rapid adoption of premium EVs.
Longevity: 15+ years lifespan reduces long-term replacement costs.
Technological leadership: Toyota holds over 1,000 solid-state battery patents worldwide, creating strong barriers to entry.
Future Outlook
Solid-state batteries are expected to reach ~4% of global EV battery penetration by 2030 and ~10% by 2035. With Toyota leading sulphide solid-state battery mass production, the company positions itself at the forefront of EV range, safety, and performance innovation.
