Solid-State Electrode Materials With Rapid-Sintered Conductive Electrolytes
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Solution Overview
Problem
Conductive solid state electrolyte materials for energy storage devices face challenges such as lower ionic and electrical conductivities compared to liquid electrolytes, and inefficient charge transfer due to interfaces with other electrode materials.
Innovation Solution
The method involves synthesizing ionically and electronically conductive solid state electrolyte materials through a rapid sintering process, followed by grinding to achieve desired particle sizes, and then mixing these materials with electrode active materials to form electrodes for energy storage devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid state electrolyte materials are used in energy storage devices, then safety and energy density are improved, but ionic and electrical conductivities deteriorate compared to liquid electrolytes
Solution Approach 1:
The patent employs composite solid state electrolyte materials combining multiple components (e.g., sulfide-based electrolytes with oxide additives, or composite structures involving Li2S-P2S5 matrices with conductive fillers) to achieve both high safety and improved ionic/electrical conductivities. The composite structure leverages the advantages of different materials to overcome the conductivity limitations of single-phase solid electrolytes.
Solution Approach 2:
The patent modifies physical and chemical parameters of solid state electrolyte materials including composition ratios, particle size distributions, density, and crystalline structure to optimize conductivity. By adjusting these parameters, the materials achieve better ion transport properties while maintaining the safety advantages of solid state systems.
2Reliability
If solid state electrolyte materials are used in energy storage devices, then safety and energy density are improved, but device performance deteriorates due to interface resistance
Solution Approach 1:
The patent applies local quality modifications at the electrode-electrolyte interface by creating regions with enhanced conductivity or different compositional characteristics. This includes surface treatment of electrolyte particles, local compositional gradients, or interface-specific coatings that reduce contact resistance without compromising the bulk safety properties of the solid state electrolyte.
Solution Approach 2:
The patent performs preliminary actions during manufacturing such as pre-sintering treatments, surface activation, or preliminary mixing protocols that prepare the interface regions for optimal contact. These preliminary steps reduce interface resistance before the final device assembly, improving charge transfer efficiency while maintaining safety.
3Productivity
If rapid sintering process is used to synthesize solid state electrolyte materials, then manufacturing efficiency is improved, but material homogeneity may deteriorate
Solution Approach 1:
The patent employs periodic action in the sintering process through multi-stage heating cycles with intermediate mixing or grinding steps. This periodic interruption and reprocessing ensures uniform material distribution and homogeneity while maintaining the efficiency benefits of rapid sintering by optimizing each stage's duration and parameters.
Solution Approach 2:
The patent replaces traditional prolonged mechanical mixing with rapid sintering techniques that achieve homogeneity through controlled thermal processes. By substituting mechanical processing with optimized thermal fields and pressure applications, the method maintains manufacturing efficiency while achieving uniform material composition.
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 approach enhances the ionic and electrical conductivities of the solid state electrolyte materials, reduces interface resistance, and improves the overall performance and efficiency of energy storage devices by enabling better ion transport and electron conduction.
Implementation Method 1
synthesizing ionically and electronically conductive solid state electrolyte materials through a rapid sintering process
Implementation Method 2
conductive solid state electrolyte materials... higher energy density... solid state electrolyte materials are non-flammable and less prone to leakage or thermal variation
Implementation Method 3
conductive solid state electrolyte materials... improved safety... can store more energy in the same volume, thereby enabling higher energy density
Data Source
AI summary
An energy storage device is provided in the present technology. The energy storage device includes one or more electrodes, each of the one or more electrodes including a solid state electrolyte material having a first average particle size less than 10 μm, wherein the solid state electrolyte material is ionically and electronically conductive, and an electrode active material having a second average particle size less than 30 μm, wherein the solid state electrolyte material and the electrode active material are mixed.