QuantumScape announced a new solid-state battery platform called Osprey on Wednesday, saying early testing showed 1,000 full charge cycles with ~80% capacity retention under gold-standard testing conditions , using a sulfide-based cathode while under just one atmosphere of pressure. The company says no other sulfide solid-state cell has previously demonstrated this publicly.
The San Jose, California based battery developer said Osprey is its next-generation open platform for all-solid-state batteries. The platform pairs the company’s proprietary ceramic separator and anode-free lithium-metal design with a solid cathode, creating an all-solid-state cell, according to the platform combines QuantumScape’s proprietary ceramic separator with an anode-free lithium-metal architecture and a solid cathode using a sulfide catholyte .
What the new platform claims
Early testing of Osprey cells showed 1,000 full charge cycles with ~80% capacity retention under gold-standard testing conditions; fast charging of 10% to 80% in five minutes; low pressure requiring only one atmosphere of pressure; and cold-weather performance operational to less than -20°C (-4°F) . The company stated it believes no other sulfide-based solid-state cell has ever demonstrated this capability .
The claim is notable because most competing sulfide-based designs require heavy external clamping hardware to keep the cell layers compressed and stable during use.
QuantumScape reported this platform enables five-minute fast charging, high-loading cathodes that enable cell energy density up to ~1100 Wh/L, and has demonstrated cathode cross-compatibility with both QS-proprietary and second-party solid cathodes .
That figure would place Osprey among the fastest charging battery chemistries disclosed by any developer this year.
Unlike QuantumScape’s existing QSE cell line, which the company designs as a complete, proprietary battery, Osprey represents a different commercial approach from the company’s existing QSE platform, which QuantumScape is developing as a complete battery technology . The company stated it has tested Osprey with all-solid cathodes developed both in-house and by its automotive customers, having already tested Osprey with solid cathodes developed by its automotive customers , laying the groundwork for multiple technology pathways for solid-state battery development.
A shift toward licensing
The result matters because the industry has long pursued sulfide-based all-solid-state batteries without producing a commercially viable one. The company is positioning Osprey as a way to open that work to outside partners rather than keep it entirely in-house.
QuantumScape stated it is working with automotive industry partners on development using the Osprey platform. The company indicated that cells based on the QSE platform are shipping to customers, and the company calls Osprey its long-term technology solution for all-solid-state battery development .
The company plans to offer licensing and co-development options for existing QuantumScape customers and extends the company’s offer to developers of sulfide-based all-solid-state batteries , according to the announcement.
QuantumScape president and chief executive Siva Sivaram was quoted in the release saying “We believe Osprey can unlock the full potential of all-solid-state batteries, and our goal is to make it the leading platform for solid-state battery development.”
Why the timing matters
The announcement lands amid a crowded field of solid-state claims from rivals. QuantumScape itself entered a joint research agreement with Honda R&D Co., Ltd., a subsidiary of Honda Motor Co., Ltd., to advance QuantumScape’s QS battery platform, with a multi-year plan focused on solid-state battery development and the associated manufacturing processes earlier this year, underscoring how competitive and collaborative the field has become.
Such range and charging promises arrive as automakers push to close the gap with gasoline refueling times, a theme also visible in how GM’s recently touted LMR chemistry aims to stretch EV range without changing pack size.
QuantumScape’s backers include Volkswagen’s PowerCo battery unit, which has previously licensed the company’s lithium-metal technology, though the automaker has not yet confirmed any production timeline tied specifically to Osprey.
The company said its existing QSE cells remain the near-term commercial product, while QSE platform is currently being scaled up to mass production as a full-stack technology solution, Osprey presents a fundamentally collaborative model for all-solid-state battery development . Despite the performance claims, Osprey remains at an early stage of development.
Faster charging and higher energy density remain two metrics that most directly address consumer range anxiety. That issue has also shaped recent battery health disclosures from traditional automakers, part of a broader push that has included range extended electric trucks promising longer distances on a single tank and plug combined.
