QuantumScape has been granted a patent for a solid-state electrochemical cell design featuring an oxide electrolyte in contact with the anode and a sulfide electrolyte at the cathode. The architecture includes specific materials for the positive electrode, buffer layer, bonding layer, and garnet layer. GlobalData’s report on QuantumScape gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on QuantumScape, Hydrogen storage alloys was a key innovation area identified from patents. QuantumScape's grant share as of June 2024 was 39%. Grant share is based on the ratio of number of grants to total number of patents.
Solid-state battery with oxide and sulfide electrolytes
The granted patent US12046712B2 describes a solid-state electrochemical cell (SSEC) designed for enhanced performance in energy storage applications. The SSEC comprises several key components: a positive electrode layer that includes an active material selected from specific lithium nickel manganese cobalt oxides and lithium nickel aluminum cobalt oxides, combined with a sulfide catholyte. The design features a single ion conducting, solid-state buffer layer made from LSTPS, which is characterized by its lithium, silicon, phosphorus, tin, and sulfur constituents, with a thickness ranging from greater than 1 µm to 15 µm. Additionally, the cell includes a borohydride bonding layer and a lithium-stuffed garnet layer, which is a specific type of garnet that incorporates lithium and is selected from a defined chemical formula.
Further claims in the patent detail the inclusion of a negative electrode, which can be a lithium metal negative electrode, and specify that the lithium-stuffed garnet layer may contact this negative electrode. The patent also allows for variations in the buffer layer, including the potential incorporation of an organic polymer. The active material can be either coated or uncoated, and the sulfide catholyte can be selected from a range of specified compounds, including LSTPS. The patent also outlines the possibility of including current collector layers for both the positive and negative electrodes, culminating in the potential for a complete battery system that utilizes the described SSEC.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
