Method for Producing Electrochemical Cells of a Solid-State Battery

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This patent describes a novel and simplified method for manufacturing electrochemical cells used in solid-state batteries. The invention eliminates the need for a separate, often expensive, electrolyte layer by modifying the surface of at least one electrode (anode or cathode) to reduce its electronic conductivity near the surface while maintaining high ionic conductivity. This modified surface acts as the electrolyte, enabling effective ion transfer but blocking electron flow, preventing short circuits and simplifying the manufacturing process.

Use CasesContent extracted from patent full text and abstract with AI.

• Production of safer and more cost-effective solid-state batteries for electric vehicles (EVs)
• Manufacturing high-energy-density batteries for portable electronic devices such as smartphones, laptops, and wearables
• Implementation in grid-scale energy storage systems supporting renewable energy sources
• Deployment in medical devices where battery safety and reliability are critical
• Development of solid-state batteries for aerospace and defense applications due to enhanced safety and compactness

BenefitsContent extracted from patent full text and abstract with AI.

• Simplifies battery manufacturing by removing the need for an additional, separate electrolyte layer
• Reduces production costs by streamlining the process and minimizing material usage
• Improves safety of batteries by avoiding flammable liquid or gel electrolytes, thus reducing risks of leakage and thermal runaway
• Enables thinner and potentially higher energy density batteries
• Flexible adaptation to various battery chemistries, including lithium-ion and sodium-ion technologies
• Facilitates miniaturization of batteries for smaller or more compact devices
• Maintains high ionic conductivity and low electronic conductivity at the interface, ensuring efficient charge transfer and battery performance

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Patent Abstract

The method according to the invention for producing at least one electrochemical cell of a solid-state battery, comprising a mixed-conducting anode, a mixed-conducting cathode, and an electrolyte arranged therebetween, is characterized in that firstly a mixed-conducting anode and a mixed-conducting cathode are produced or provided. The surface of at least one of the two electrodes is modified by an additional method step in such a way that, in a layer of the electrode near the surface, the electronic conductivity perpendicular to the cell is reduced to less than 10-8 S/cm. Anode and cathode are then assembled to form a solid-state battery in such a way that the surface-modified layer of at least one electrode is arranged as electrolyte layer between the anode and cathode, and the mixed-conducting electrodes are thereby electronically separated.