Optimized Garnet Materials for Solid State Battery Performance
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Summary
Problems
Current garnet materials for solid state lithium-ion batteries lack suitable morphology, conductivity, and stability for effective integration as catholytes, electrolytes, or anolytes, due to insufficient processing techniques that are incompatible with solid state battery components.
Innovation solutions
Development of novel methods for forming lithium-stuffed garnet thin films and powders with specific morphologies, conductivities, and surface properties, including reactive sintering and flux sintering, to create stable and conductive garnet materials suitable for use in solid state batteries.
TRIZ Analysis
Specific contradictions:
General conflict description:
Principle concept:
If conventional garnet materials are used, then the basic structure is available, but the conductivity and morphology are insufficient for effective battery function
Why choose this principle:
The patent applies parameter changes by modifying processing conditions (temperature, atmosphere, time) to transform garnet materials from conventional forms to optimized forms with enhanced conductivity and appropriate morphology. Specifically, reactive sintering at controlled temperatures and flux sintering with specific flux compositions change the physical and chemical parameters of garnet to achieve the desired properties for battery application.
Principle concept:
If conventional garnet materials are used, then the basic structure is available, but the conductivity and morphology are insufficient for effective battery function
Why choose this principle:
The patent employs composite materials through flux sintering where garnet combines with flux materials (such as carbonates, borates, or silicates) to form composite structures. This composite approach enables the garnet to achieve improved conductivity and morphology while maintaining structural integrity, resolving the contradiction between performance and manufacturability.
Application Domain
Data Source
AI summary:
Development of novel methods for forming lithium-stuffed garnet thin films and powders with specific morphologies, conductivities, and surface properties, including reactive sintering and flux sintering, to create stable and conductive garnet materials suitable for use in solid state batteries.
Abstract
Set forth herein are garnet material compositions, e.g., lithium-stuffed garnets and lithium-stuffed garnets doped with alumina, which are suitable for use as electrolytes and catholytes in solid state battery applications. Set forth herein are lithium-stuffed garnet thin films having fine grains therein. Disclosed herein are novel and inventive methods of making and using lithium-stuffed garnets as catholytes, electrolytes and/or anolytes for all solid state lithium rechargeable batteries. Disclosed herein are novel electrochemical devices which incorporate these garnet catholytes, electrolytes and/or anolytes. Set forth herein are methods for preparing novel structures, including dense thin free standing membranes of an ionically conducting material for use as a catholyte, electrolyte, and, or, anolyte, in an electrochemical device, a battery component (positive or negative electrode materials), or a complete solid state electrochemical energy storage device. The methods set forth herein disclose novel sintering techniques for solid state energy storage devices and the components thereof.