Lithium-Ion Composite Electrolyte with High Particle Filling
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Solution Overview
Problem
Current lithium-ion batteries face challenges with the chemical and electrochemical stability of solid-state electrolytes, leading to potential self-destruction and safety issues, and existing production methods for high lithium ion conductivity materials are complex and costly, with limited particle filling capabilities.
Innovation Solution
A lithium ion-conducting composite material comprising a polymer and lithium ion-conducting particles with high sphericity and polydispersity index, allowing for increased particle filling and simplified, more economical production, which can be used directly as a lithium ion conductor or as an intermediate for further processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If spherical particles with high sphericity and polydispersity are used, then particle filling level is improved, but manufacturing complexity increases
Solution Approach 1:
The patent changes the physical parameters of the particles by specifying sphericity of at least 0.7 and polydispersity index of at least 1.2, which enables significantly higher particle filling levels in the composite material while maintaining manufacturability
Solution Approach 2:
The invention creates a composite material system combining polymer matrix with inorganic lithium ion conducting particles, where the specific particle morphology parameters enable optimized packing and filling without requiring complex manufacturing processes
2Reliability
If complex production methods are used to achieve high lithium ion conductivity, then conductivity is improved, but production cost and complexity increase
Solution Approach 1:
The patent achieves high lithium ion conductivity by optimizing particle parameters (sphericity ≥ 0.7, polydispersity index ≥ 1.2) and composition ratios rather than using complex multi-step production methods, thereby maintaining high conductivity while simplifying manufacturing
3Stability of the object's composition
If protective gas and complex grinding processes are used for sulfide-based electrolytes, then chemical stability is improved, but production cost increases
Solution Approach 1:
The patent achieves sufficient chemical stability through optimized particle parameters and composite material composition, eliminating the need for protective gas environments and complex grinding processes that increase production costs
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
The composite material achieves significantly higher particle filling levels and improved lithium ion conductivity, enhancing the safety and efficiency of lithium batteries while reducing production costs and complexity.
Implementation Method 1
lithium ion-conducting particles with high sphericity and polydispersity index, allowing for increased particle filling and simplified, more economical production
Data Source
AI summary
Lithium-ion conductive composite material comprising at least one polymer and lithium-ion conductive particles, wherein the particles have a sphericity Ψ of at least 0.7 and that the composite material contains at least 20 vol% of the particles with a polydispersity index PI of the particle size distribution of < 0.7, or that the composite material contains at least 30 vol% of the particles with a polydispersity index PI of the particle size distribution in the range of 0.7 to < 1.2, or that the composite material contains at least 40 vol% of the particles with a polydispersity index PI of the particle size distribution of > 1.2.