Glassy Solid-State Electrode Assembly for High Energy Density
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Solution Overview
Problem
Current solid-state battery technologies face limitations in achieving high power output, reduced charging time, and improved cycle life, particularly in terms of energy density and ion conductivity.
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 ion-transparent interface for lithium solid-state battery cells, minimizing non-active material and enabling effective ion conduction.
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 easier, but energy density and ion conductivity are limited
Solution Approach 1:
The patent merges multiple discrete component layers into a single integrated glassy embedded electrode assembly where the glassy medium simultaneously serves as electrolyte, separator, and binder, eliminating the need for separate discrete layers and achieving higher energy density while maintaining manufacturability
Solution Approach 2:
The patent employs a composite material structure consisting of a glassy sulfide medium embedded with electroactive material particles, creating a unified composite electrode assembly that achieves both high energy density and effective ion conduction while simplifying manufacturing processes
2Stability of the object's composition
If more non-active material is used in discrete layer construction, then structural stability is improved, but energy density decreases
Solution Approach 1:
The glassy medium performs multiple functions simultaneously: it acts as electrolyte for ion conduction, separator for electrode isolation, binder for particle cohesion, and protective coating for stability, thereby achieving structural stability without requiring additional non-active materials that would reduce energy density
Solution Approach 2:
The glassy medium is locally optimized to provide different properties in different regions: it forms a continuous phase for ion conduction, creates porous structures for electroactive material dispersion, and provides stable interfaces for electrode separation, all within a single material system
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 ion conduction, leading to enhanced power output, reduced charging time, and improved cycle life in solid-state battery cells.
Implementation Method 1
a continuous glassy medium including a Li ion conducting sulfide glass
Implementation Method 2
the glassy cover region is substantially devoid of crystalline particles (i.e., crystallites) that are not suitably conductive to Li ions
Data Source
AI summary
Batteries, component structures and manufacturing methods, in particular including a glassy embedded battery electrode assembly having a composite material structure composed of interpenetrating material components including a porous electroactive network including a solid electroactive material, and a continuous glassy medium including a Li ion conducting sulfide glass, can achieve enhanced power output, reduced charging time and/or improved cycle life.