Solid-state batteries have been the electric-vehicle industry’s most repeated promise for years: more energy, faster charging, better safety. The sticking point has been making them work outside a lab. On 11 November 2026, QuantumScape announced Osprey, an open platform for all-solid-state batteries that it says clears two of the biggest practical hurdles at once.
The company reports that Osprey cells have delivered what it calls the first public data showing a sulfide-based cathode cycling 1,000 times under just one atmosphere of pressure. These are early test results, but the claim goes straight at a problem the whole field has struggled with.
What Osprey is
According to QuantumScape’s press release, Osprey pairs the company’s proprietary ceramic separator and anode-free lithium-metal design with a solid cathode, which makes the cell all-solid-state. It builds on the company’s existing QSE platform, whose cells the company says are already shipping to customers.
The word open matters. QuantumScape describes Osprey as a platform able to work with a range of cathode chemistries, and says it has tested it with all-solid cathodes developed in-house and by its automotive customers. The announcement also opens licensing and co-development options for current customers and for developers of sulfide-based all-solid-state batteries.
The numbers the company reports
In early testing, QuantumScape says Osprey cells demonstrated four things:
- Cycle life: 1,000 full charge cycles with about 80% capacity retention under what the company calls gold-standard testing conditions.
- Fast charging: 10% to 80% in five minutes.
- Low pressure: only one atmosphere of pressure required.
- Cold weather: operation below minus 20 degrees Celsius (minus 4 degrees Fahrenheit).
The company also projects energy densities of up to about 1,100 Wh/L. That figure is a projection, not a measured result, and test conditions are detailed in a white paper the company published alongside the announcement.
Why pressure is the real story
The release explains the industry background. Sulfide electrolytes have long been pursued for all-solid-state batteries, but none has yet produced a commercially viable technology. Sulfides can react with lithium metal, which shortens battery life, and they usually need to be held under high pressure to operate. That is impractical for vehicles and many other applications.
Running at one atmosphere, roughly ordinary air pressure, would remove much of that burden. QuantumScape’s chief executive, Dr. Siva Sivaram, said the industry has invested heavily in sulfide-based batteries but keeps hitting the same fundamental limits, and that Osprey can address them.
What it means
For automakers, the appeal is optionality. Osprey is positioned as a long-term technology path, and the company says it is already working with partners across the automotive industry on development. A platform that accepts different cathodes lets a customer bring its own materials rather than start from scratch.
For drivers, nothing changes today. The data come from early cells, and QuantumScape’s own forward-looking statements list the risks plainly: whether early results can be replicated in commercial cell formats or at scale, whether licensing deals materialise, and whether cost, quality and throughput targets can be met. The company also states that QSE cells, not Osprey, are what is shipping now.
The broader point is strategic. Sharing a platform instead of keeping it closed signals that the company sees licensing and co-development as part of the route to market, which could shape how solid-state batteries reach vehicles and other storage uses.
Conclusion
Osprey is a notable claim rather than a finished product: 1,000 cycles near 80% retention, five-minute fast charging and one-atmosphere operation in early cells. If those results hold up in larger, commercial formats, they would address the pressure problem that has held sulfide solid-state designs back. Independent validation and scale-up are the milestones to watch.