Glassy Embedded Battery Electrodes With Integrated Solid Electrolyte
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Solution Overview
Problem
Current solid-state battery cells face challenges in achieving high power output, reduced charging time, and improved cycle life due to limitations in electrode materials and separation mechanisms.
Innovation Solution
The development of a glassy embedded solid-state electrode assembly with a composite material structure comprising a porous electroactive network and a continuous Li ion conductive glassy sulfide medium, which provides a robust, stable, and ionically conductive interface for high-performance lithium solid-state battery cells, minimizing non-active material and enabling efficient ion migration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If discretely fabricated component layers are used in stacked or wound construction, then manufacturing is simplified, but power output and charging time performance deteriorate
Solution Approach 1:
The patent merges the electrode and separator functions into a single integrated glassy embedded electrode assembly. The glassy sulfide medium serves dual purposes as both electrolyte and separator, eliminating the need for discrete layer assembly and enabling improved power output while maintaining manufacturing simplicity through a unified structure.
Solution Approach 2:
The patent employs composite materials by creating an interpenetrating network of electroactive material and glassy sulfide medium within a single assembly. This composite structure enables simultaneous achievement of high power output and simplified manufacturing by integrating multiple functional components into one material system.
2Quantity of substance
If more active material is added to increase capacity, then energy density improves, but ion transport resistance increases
Solution Approach 1:
The patent utilizes a porous electroactive network embedded within the glassy sulfide medium. The porous structure provides extensive surface area for electroactive material while maintaining open pathways for efficient ion transport, allowing high capacity without compromising ion transport efficiency.
Solution Approach 2:
The glassy sulfide medium locally encapsulates and supports the electroactive network, creating regions of high ion conductivity exactly where needed. This local optimization ensures that ion transport remains efficient even as total capacity increases through addition of more active material.
3Stability of the object's composition
If solid-state separation is implemented, then safety and stability improve, but ionic conductivity deteriorates
Solution Approach 1:
The patent employs glassy sulfide composite material that combines the stability of solid-state structure with high ionic conductivity. The composite nature of the glassy medium provides both mechanical stability for solid-state separation and sufficient ionic conductivity to maintain reliable battery operation.
4Quantity of substance
If non-active material is minimized for high energy density, then energy density improves, but structural integrity deteriorates
Solution Approach 1:
The glassy sulfide medium performs multiple functions simultaneously: it serves as electrolyte, separator, and structural support matrix. This multi-functionality allows minimization of non-active material while maintaining structural integrity, as the glassy medium provides mechanical strength without requiring additional support layers.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution supports high areal ampere-hour capacity, minimizes inactive material, and provides effective ionically conductive solid-state separation, enhancing the performance and longevity of lithium solid-state battery cells.
Implementation Method 1
a continuous glassy medium including a Li ion conducting sulfide glass
Data Source
AI summary
Batteries, component structures and manufacturing methods, in particular including a glassy embedded electrode assembly having a solid electrolyte separator layer of a glass or glass ceramic or full ceramic of the garnet type that is fabricated initially as a glass sheet. The glass may be processed from a Ta doped Li7La3Zr2O12 material using glass forming dopants (e.g., by melt quenching and then drawing the glass into the ribbon). The ribbon so formed may be used as a dense solid electrolyte layer if sufficiently conductive, or otherwise heat treated to crystallize a more conductive phase. The solid electrolyte layer may be an oxide or phosphate Li ion conducting solid electrolyte.