Short answer: Toyota’s often-quoted 1,200-kilometre (about 745–746-mile) solid-state range is a company target, not a verified EPA rating or production-car result. Idemitsu is helping solve the less visible bottleneck: making the sulfide solid electrolyte consistently and at industrial scale. The companies target commercialization of all-solid-state battery electric vehicles in 2027–2028, but no named 745-mile Toyota model, price, market launch or certified range has been confirmed.
Where Toyota’s 745-mile number comes from
Toyota has described a possible all-solid-state battery vehicle with approximately 1,200 km of range and charging in roughly 10 minutes. Reuters reported those figures in coverage of the Toyota–Idemitsu agreement, but they have not been established as an EPA-certified range, an independent road-test result or a specification for a named production model. Reuters’ report attributes the projection to Toyota.
The distinction matters. A battery’s cell energy density is only one input to vehicle range. Body shape, curb weight, tires, temperature, speed, software, usable state-of-charge limits and the test procedure all affect the number. A highly aerodynamic sedan could deliver a very different result from an SUV using similar cells.
Toyota has also announced a separate next-generation BEV target of 1,000 km for 2026. That roadmap should not be merged with the all-solid-state program targeted for 2027–2028. Toyota’s electrified-technology announcement discusses both battery and vehicle-efficiency improvements.
Free tools Windows power users keep installed
One-click scans. No signup required.
What an all-solid-state battery changes
Conventional lithium-ion cells use a liquid electrolyte to carry lithium ions between the electrodes. An all-solid-state cell replaces that liquid with a solid electrolyte. Idemitsu describes potential benefits including shorter charging times, higher power output, greater energy density and longer service life. These are expected properties of the technology, not a guarantee that every production cell will deliver all of them. Idemitsu’s January 2026 announcement explains the material’s role.
“Solid-state” also does not mean fireproof or risk-free. A complete pack still contains reactive electrodes, current collectors, wiring, structural materials and large amounts of stored electrical energy. Interfaces and manufacturing defects can determine safety as much as the electrolyte itself.
Why Toyota and Idemitsu chose sulfide chemistry
The partnership focuses on sulfide solid electrolytes. Toyota and Idemitsu describe sulfide materials as relatively soft and adhesive compared with some other solid-electrolyte families. Those characteristics may help the electrolyte maintain contact with the battery’s layered electrodes and support processing into a manufacturable cell.
Sulfides also create engineering constraints. They are sensitive to moisture, so factories need tightly controlled atmospheres, equipment and handling procedures. Toyota and Idemitsu do not present sulfide chemistry as categorically superior to oxide or polymer alternatives; the choice reflects a balance of conductivity, layer contact, processing and scale-up requirements. Their partnership presentation is available as a PDF from Idemitsu.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteRank #2
- [𝑷𝒐𝒘𝒆𝒓𝒇𝒖𝒍 𝑯𝒐𝒎𝒆 𝑩𝒂𝒄𝒌𝒖𝒑 & 𝑷𝒐𝒓𝒕𝒂𝒃𝒍𝒆 𝑷𝒐𝒘𝒆𝒓]： With built-in 5 X 2200W (3000W with P-Boost on), Pure Sine Wave AC outlets, and up to 3 USB C charging port 100W max, you get stable power for your phone, laptop, fridge, and 99% of home devices, ideal for travel and home backup.
- [𝑷𝒐𝒘𝒆𝒓 𝒕𝒐 𝑹𝒆𝒅𝒆𝒇𝒊𝒏𝒆 𝑺𝒂𝒇𝒆𝒕𝒚]：Dabbsson is the first brand to use industry-leading EV semi-solid state LiFePO4 batteries and the highest fireproof rating UL94 V0 outer shell the thermal runaway is 4X higher than Li-NMC battery which is more stale in hotter temperature, the ideal choice for safe storage ever. Use and recharge DBS2300 more than 4500 times (extra 500 with BMS system) before hitting 80%, almost 15 years of regular use.
- [𝑬𝒙𝒑𝒂𝒏𝒅𝒂𝒃𝒍𝒆 𝑷𝒐𝒘𝒆𝒓 𝑪𝒂𝒑𝒂𝒄𝒊𝒕𝒚]： Easily expand the 2330Wh capacity battery power station. Link two extra batteries to get a massive 8330Wh, keeping your home powered on in any emergency and satisfying your electricity needs for days during power outages or a blackout.
- [4 𝑭𝒂𝒔𝒕 𝑾𝒂𝒚𝒔 𝒕𝒐 𝑹𝒆𝒄𝒉𝒂𝒓𝒈𝒆]： The AC input features 1800W Max, recharging your DBS2300 to 98% in just 1.5 hours and you can adjustable 200-1800W by our APP as you need. The solar input supports 3000W Max endless green power that can fully charge DBS2300+2DBS3000B in only 2.5 hours. You can also use a 12V/24V car charger on-the-go or a generator charger (extra adapter needed).
- [15𝑴𝑺 𝑬𝑷𝑺 𝑨𝒖𝒕𝒐-𝑺𝒘𝒊𝒕𝒄𝒉]：With a switchover speed of less than 15ms, you won't even notice your power is low. Use the DBS2300 as an emergency power supply for overnight outages to keep your appliances running.
What each company is responsible for
| Company | Announced responsibilities |
|---|---|
| Toyota | Develop the all-solid-state cell and the BEV that uses it; refine battery processing, assembly and vehicle integration; validate performance, durability, cost and production readiness. |
| Idemitsu | Develop sulfide-electrolyte formulations; improve quality, cost, lead time and productivity; demonstrate production processes; build pilot capacity and establish a materials supply chain. |
The companies’ three-phase plan starts with electrolyte development and pilot preparation, moves to pilot-scale production, and then examines future full-scale production. Toyota remains responsible for the battery and vehicle program; Idemitsu is not supplying a complete finished battery. Toyota’s October 12, 2023 announcement sets out that division of labor.
What changed with Idemitsu’s January 2026 facility
Idemitsu said on January 29, 2026 that it had made a final investment decision and begun construction of a large pilot facility at its Chiba Complex in Ichihara, Chiba Prefecture. Completion is targeted for 2027, with expected output of several hundred tonnes of solid electrolyte per year. The material is intended for Toyota’s all-solid-state BEV batteries. Idemitsu also operates two smaller verification facilities. The company’s announcement provides those figures and dates.
This is an important bridge between laboratory samples and commercial manufacturing:
- Material development: formulate an electrolyte with the required conductivity, softness, purity and stability.
- Pilot production: prove that equipment can make repeatable batches at controlled quality and yield.
- Cell and vehicle validation: build cells, packs and vehicles that survive charging cycles, temperature changes, vibration and real operating conditions.
- Full-scale manufacturing: expand raw-material supply, factory throughput, quality control, logistics and recycling.
A pilot plant demonstrates process capability; it does not establish how many vehicles Toyota can build, what they will cost, how long their batteries will last or whether a launch schedule is guaranteed.
Quick wins for a faster PC:
Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Clear out junk files and repair common Windows errorsFree Scan →Scan for outdated or missing drivers - takes under a minuteDriver Scan →Why Idemitsu is a logical materials partner
Idemitsu’s role is best understood as industrial materials and process development. The company says it has researched solid electrolytes for decades, including lithium sulfide, an intermediate used in sulfide electrolytes. It dates that work to the 1990s and says lithium sulfide can be made from sulfur-related by-products of petroleum refining. That may offer a feedstock and process advantage, but it does not automatically make the finished battery inexpensive or low-carbon.
Idemitsu is also pursuing a lithium-sulfide production facility at the Chiba Complex. That is a supply-chain development, not evidence that every component of a Toyota battery will be made at one location. See Idemitsu’s lithium-sulfide overview and lithium-battery materials information.
The remaining gates before a 745-mile car
Manufacturing yield
Solid-state cells contain many thin layers and interfaces. Tiny defects can increase resistance, reduce capacity or cause early failure. The commercial test is millions of consistent cells at an acceptable yield, not one working laboratory cell.
Interface stability and mechanical design
The electrolyte must stay in reliable contact with both electrodes through repeated cycling, temperature swings, vibration and mechanical stress. Some solid-state designs may require stack pressure or other mechanical controls that a vehicle must maintain for its entire life without excessive mass or complexity.
Dendrites, moisture and safety
Solid electrolytes may reduce some liquid-electrolyte risks but do not automatically eliminate lithium dendrites or internal shorts. Sulfide processing also requires careful moisture control, affecting factory design, waste handling, cost and yield.
Durability and cold-weather performance
Toyota has discussed long life and rapid charging, but public material does not yet establish independent, long-duration fleet results for a production Toyota solid-state vehicle. Buyers will need evidence across cold temperatures, high speeds, fast charging and normal aging.
Cost and supply
Higher energy density could eventually reduce pack size, but early cells may cost more because of specialized equipment, low initial yields, controlled atmospheres and limited volume. Raw materials, quality systems, logistics and recycling must all scale alongside the electrolyte plant.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What “commercialization in 2027–2028” actually means
Toyota and Idemitsu say they aim to commercialize BEVs equipped with all-solid-state batteries during 2027–2028. Toyota’s later public filings continue to describe that period as a target. Toyota’s 2025 Form 20-F does not turn it into a promise of a particular model or market.
What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Best Value
- Check Sizes Before Ordering: This battery mat comes at 11.73 x 7.87 x 0.40 inches. It fits many vehicles like cars, trucks, boats, SUVs, and RVs. We recommend buying according to your specific needs. A correct match reduce the risk of performance issues and keeps your battery well protected
- Reduces Mechanical Stress: The battery tray mat absorbs and spreads out external shocks. It lowers damage from drops, collisions, or rough roads during transport, installation, or daily use. Better shock absorption means your battery faces less vibration-related wear and tear
- Stretches Without Tearing: This battery protect mat is made from sponge that offers real flexibility. It can stretch or squeeze without coming apart. The material handles repeated actions when you install or reduce the battery, making it a durable choice for long-term use
- Quick DIY Installation: Putting in this battery mat is fast and easy. Trim it down to fit your battery's actual size, then slide it inside the compartment. Once secured, the mat stays firmly in place. No complicated steps—just cut, place, and you're done
- Rolls Up For Easy Storage: This battery mat is light and won't weigh you down. You can roll or fold it to fit into tiny storage spaces. Keep it with your batteries, and you'll always have protection ready. Excellent for those who need to save space in their garage or toolbox
The wording does not establish that full-volume production starts at the beginning of 2027, that a 745-mile vehicle will be sold in the United States, that every Toyota EV will use the chemistry, or that the battery will qualify for a 745-mile EPA rating. “Commercialization” may mean a first, limited market introduction rather than broad availability.
How much of the range comes from the vehicle
A headline range could result from several gains working together:
- Higher cell-level energy density and more usable capacity.
- Lower battery mass for a given range.
- More aerodynamic bodywork and lower rolling resistance.
- More efficient motors, inverters and thermal systems.
- Software that reduces energy use.
- A larger pack, if the vehicle and cost targets allow it.
Toyota has explicitly linked range improvements to aerodynamics and weight reduction as well as battery chemistry. A solid electrolyte alone does not create a 745-mile vehicle.
How to judge the claim when a vehicle is announced
- Identify the test standard: EPA, WLTP, CLTC, Japanese WLTC or an engineering estimate.
- Check whether the number applies to a complete vehicle or only to calculated cell capability.
- Look for the vehicle body style, battery size and usable capacity.
- Ask how much capacity remains after long-term aging.
- Examine the charging window behind the “10-minute” figure and the required charging power.
- Check cold-weather, high-speed, cargo and towing performance.
- Look for an independent test and a confirmed production volume, price and market.
What EV buyers should expect first
Early vehicles are more likely to have limited availability and premium pricing than to replace Toyota’s entire EV lineup. A highly aerodynamic car may arrive before an SUV or pickup, and the first launch could be restricted to selected regions. A 10-minute charging claim also requires a suitably powerful station, a battery that can accept that power without damaging its life, and adequate grid and thermal infrastructure.
What Toyota has not yet proven
- No named production Toyota model has a confirmed 745-mile specification.
- The 1,200-km figure is not established as an EPA-certified range.
- No United States launch date or global availability has been confirmed.
- No production price or first-year volume has been announced for such a vehicle.
- No independent long-term fleet evidence for a production Toyota solid-state EV is public.
- The 2027–2028 target does not guarantee high-volume or mainstream deployment.
Bottom line
Idemitsu makes Toyota’s solid-state plan more credible because it addresses the industrial problem behind the chemistry: consistent sulfide-electrolyte production and a dependable supply chain. The Chiba pilot facility is a meaningful 2026 milestone, but it is still a pilot step. Toyota’s 745-mile vision remains a projected capability, not a certified production-car result. Whether buyers ever receive that range at an acceptable price depends on cell yield, interface durability, vehicle efficiency, charging infrastructure and the scale-up steps still ahead.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
