What QuantumScape promised before it went public
A solid state battery moves the charge between its electrodes through a solid material, instead of the liquid inside an ordinary lithium ion battery, and makers say the solid material packs more energy into the same space and charges faster. QuantumScape, a battery maker that went public through a merger with a special purpose acquisition company on November 27, 2020, told investors before that listing it could commercialize its first battery by 2024, with revenue growing from 14,000,000 dollars in 2024 to 275,000,000 dollars in 2026. Commercial readiness is the point at which a company says its battery is ready to sell to carmakers in volume, not a single cell built by hand in a lab. By August 2026, according to The Motley Fool, QuantumScape had commercialized no battery and generated no meaningful revenue, and its own second quarter 2026 report pushed commercial readiness back to 2029, 5 years past the date it first promised.
QuantumScape stated both promised figures before its 2020 stock market debut. The Motley Fool reports that by August 2026 QuantumScape had generated no meaningful revenue, drawn here as 0 for comparison, a rendering decision by this publication, not a figure QuantumScape itself states as exactly zero.
Show the numbers
| Promised for 2024 | 14 |
| Promised for 2026 | 275 |
| Reported by August 2026 | 0 |
Toyota has pushed its own launch date back 3 times
Toyota was initially planning to launch a solid state battery powered car in 2020, then pushed the launch back to 2023, then to 2026, according to Electrek. Keiji Kaita, president of Toyota Carbon Neutral Advanced Engineering Development Center, confirmed at the Tokyo Motor Show in October 2025 that the company is now working toward 2028. That is 8 years later than the date Toyota first named.
Each restated year comes from 1 sentence in source 2, that Toyota was initially planning to launch in 2020, pushed the launch back to 2023, then to 2026, and confirmed 2028 through a named Toyota executive in October 2025. The years pushed back are this publication subtraction on those dates, not a figure Toyota itself states.
Show the numbers
| 2020 restated to 2023 | 3 |
| 2023 restated to 2026 | 3 |
| 2026 restated to 2028 | 2 |
What the other 3 companies say
Nissan states a single target, an electric vehicle with an all solid state battery by fiscal year 2028, with no earlier date on record to compare it against. A Japanese fiscal year runs from April to March, so fiscal year 2028 begins in April 2028. Samsung SDI says it has run a pilot line for solid state batteries in Suwon, South Korea, since March 2022, and its own account from December 2024 names 2027 for mass production. Honda opened a demonstration production line covering about 27,400 square metres in Sakura City, Tochigi Prefecture, in November 2024, built on an investment of about 43 billion yen, and aims to put a solid state battery into a market model sometime in the second half of the 2020s.
The all-solid-state battery is an innovative technology that will be a game changer in this EV era.
Keiji Otsu, president and representative director of Honda R and D Co Ltd. Source 4.
This chart crosses 4 sources. The Samsung SDI year is from source 5, the Toyota year from source 2, the Nissan year from source 3, and the QuantumScape year from source 1. Honda is left out because its own target is a range, the second half of the 2020s, not a single year.
Show the numbers
| Samsung SDI, target 2027 | 1 |
| Toyota, target 2028 | 2 |
| Nissan, target fiscal 2028 | 2 |
| QuantumScape, target 2029 | 3 |
None of the five has shipped one
As of September 1, 2026, none of the 5 companies in this article has put a solid state battery inside a car a customer can buy. QuantumScape shows the gap widening rather than closing, its own stated readiness date has moved 5 years since the 2024 date first promised, more than the 2 years that have passed since it named that date. Every one of these 5 programs promises the same thing, a solid material that lets a car charge faster and travel further on 1 charge. The years between announcing that promise and shipping it keep getting longer, not shorter.