All-solid-state battery by Toyota: status and timeline

Milestones

Next · Idemitsu Kosan pilot plant operational for electrolyte production

Production approval from Ministry of Economy Trade and IndustryOct 2025Complete.
Idemitsu Kosan pilot plant operational for electrolyte productionTarget Jan 2027Not yet reached.
First Toyota EVs equipped with solid-state batteryTarget Q2 2027Not yet reached.
Sumitomo Metal Mining mass production of cathode materialsTarget 2028Not yet reached.

Most important updates

Idemitsu Kosan begins construction on large-scale solid electrolyte pilot plant for Toyota30 Jan 2026
Toyota and Sumitomo Metal Mining agree to mass-produce cathode materials for solid-state batteries9 Oct 2025
Japan approves Toyota solid-state battery production plans, partnering with Idemitsu and Sumitomo7 Oct 2025

Upcoming

Jan 2027Idemitsu Kosan pilot plant operational for electrolyte productionin about 12 weeks (next)
Q2 2027First Toyota EVs equipped with solid-state battery
Q2 2027First Toyota EVs with solid-state battery in market
2028Sumitomo Metal Mining mass production of cathode materials

Current obstacles

Dendrite growth and cycling degradationLithium ions form conductive paths (dendrites) that degrade performance. Long calendar life with acceptable capacity retention unproven.
Manufacturing complexity and costSolid electrolyte fabrication is complex multi-step manufacturing with low yields. Cost per kWh remains higher than liquid.

Physics limits

Theoretical energy density plateauLithium-ion maxes out ~250 Wh/kg. Solid-state gains 20–50% through higher voltage and denser packing; further gains need lithium-metal anodes.

How it works

3 parts

Solid electrolyte advantage

Ceramic carrier instead of liquid

Ceramic withstands higher voltage, enabling denser packing and non-flammable design with no thermal runaway.

Range and charge speed

Lighter, more energy-dense

Solid electrolyte enables thinner electrodes and denser layering. Same size battery holds more energy, or smaller battery achieves same range at lower weight.

Safety design

No liquid to leak or burn

Solid ceramic blocks lithium dendrite short-circuits. No flammable liquid to leak or catch fire if punctured or defective.

Spec sheet

Spec	All-solid-state battery
First generation target range	1,000 km^R (reported)
Second generation target range	1,200 km^R (reported)
Fast charging target (10% to 80%)	10 minutes^R (reported)
Energy density (first generation)	450–500 Wh/kg^R (reported)
Target calendar life	10+ years^E (estimated)

^R reported by the company · ^E our estimate

Update log

3 updates

About Toyota

The team behind All-solid-state battery

Toyota

Vehicles, batteries, solid-state, electric, hydrogen

Toyota is the world's largest automaker by volume. It pioneered mass-production hybrid vehicles (Prius, 1997) and leads in electric and hydrogen fuel-cell development. The company is developing all-solid-state batteries with ceramic electrolytes to enable longer-range EVs with faster charging.

Developed sulfide-based solid-state batteries with Idemitsu Kosan; Japan approved production in October 2025.
First vehicles equipped in 2027–2028 targeting 1,000 km range and 10-minute charging.
Solid ceramic electrolyte replaces liquid, enabling denser, safer, more efficient cells with higher energy density.

global.toyota (opens global.toyota)Company profile →

Founded: 193789 yrs
Headquarters: Japan
Status: Public
Valuation: public
Works in: EnergyBatteriesVehicles
Coverage: 1 program · 3 updateslatest 30 Jan 2026checked 10 Oct
Partners: Idemitsu Kosan (opens idemitsu.com)Sumitomo Metal Mining (opens sumitomometals.com)

All-solid-state battery

Milestones

Most important updates

Upcoming

Current obstacles

Physics limits

How it works

Ceramic carrier instead of liquid

Lighter, more energy-dense

No liquid to leak or burn

Spec sheet

Update log

Fri 30 Jan

Thu 9 Oct 2025

Tue 7 Oct 2025

About Toyota

Current obstacles

Physics limits

How it works

Ceramic carrier instead of liquid

Lighter, more energy-dense

No liquid to leak or burn

Spec sheet

Update log

Fri 30 Jan

Thu 9 Oct 2025

Tue 7 Oct 2025

About Toyota