QuantumScape has introduced Osprey, a new all-solid-state battery development platform combining its ceramic separator and anode-free lithium-metal design with a solid cathode.
Announced on November 11, the platform has demonstrated 1,000 full charge cycles with approximately 80% capacity retention under one atmosphere of pressure. QuantumScape also reported charging from 10% to 80% in five minutes during early testing.
QuantumScape Plans 100 MWh Solid-State Battery Production Line for 2028
Solid Cathode Targets Battery Performance Limitations
Osprey builds on QuantumScape’s existing QSE technology platform but replaces its liquid catholyte and high-nickel NMC cathode with a solid sulfide cathode.
The company says this configuration enables an all-solid-state design with projected energy density of up to approximately 1,100 Wh/L. It also demonstrated operation at temperatures below -20°C.
QuantumScape says sulfide-based batteries have traditionally faced challenges involving reactions with lithium metal and the high pressure needed to maintain performance. The company describes Osprey’s 1,000-cycle result under one atmosphere as the first publicly reported demonstration of this kind for a sulfide-based cathode.
Testing was conducted at room temperature using 1C charge and discharge rates, cathode loading above 5 mAh/cm² and 100% depth of discharge.
QuantumScape and Honda Launch Multi-Year Solid-State Battery Research Partnership
Licensing and Automotive Partnerships
QuantumScape designed Osprey as an open platform compatible with different cathode chemistries. The company has tested cells using solid cathodes developed internally and by automotive customers.
The platform could expand its licensing and co-development opportunities, including partnerships with developers working on sulfide-based solid-state batteries.
“The industry has invested heavily in sulfide-based batteries but keeps hitting the same fundamental limits. As the data shows, Osprey can address these limitations,” said Siva Sivaram, president and CEO of QuantumScape.
QuantumScape Opens ‘Eagle Line’ Solid-State Battery Facility in San Jose
The company is already working with automotive partners on Osprey development, while cells based on its QSE platform are being shipped to customers. QuantumScape positions Osprey as its longer-term technology platform for advancing all-solid-state battery development.