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AssigneeQuantumScape Corporation
InventorsDavid CAO, Cheng-Chieh CHAO, Zhebo CHEN, Lei CHENG, Niall DONNELLY, Wes Hermann, Tim HOLME, Tommy HUANG, Kian KERMAN, Yang LI, Harsh MAHESHWARI
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The disclosure herein relates to rechargeable batteries and solid electrolytes therefore which include lithium-stuffed garnet oxides, for example, in a thin film, pellet, or monolith format wherein the density of defects at a surface or surfaces of the solid electrolyte is less than the density of defects in the bulk. In certain disclosed embodiments, the solid-state anolyte, electrolyte, and catholyte thin films, separators, and monoliths consist essentially of an oxide that conducts Li+ ions. In some examples, the disclosure herein presents new and useful solid electrolytes for solid-state or partially solid-state batteries. In some examples, the disclosure presents new lithium-stuffed garnet solid electrolytes and rechargeable batteries which include these electrolytes as separators between a cathode and a lithium metal anode.
A separator comprising a lithium-stuffed garnet and having top and bottom surfaces and a bulk therebetween,
A thin film lithium-stuffed garnet electrolyte, wherein the thin film is substantially homogenous within x- and y-dimensions;
A process for selectively reducing the number and/or size of surface-pores and defects on a lithium-stuffed garnet separator, the method comprising:
A process for making a solid electrolyte, comprising
The method of claim 48, comprising cycling the electrochemical cell at 2 mA/cm2 at 22° C.
Dependencies are inferred from the claim text.