Cross-linked Polyether Electrolyte for Leakage Prevention
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Solution Overview
Problem
Existing electrolyte compositions for electrochemical devices face challenges with liquid leakage and poor workability due to their solid form, which compromises ion conductivity and ease of application.
Innovation Solution
A polyether compound with oxirane monomer units, cationic groups, and cross-linkable groups is developed, allowing for cross-linking to enhance shape retention and workability while maintaining excellent ion conductivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid polymer electrolyte composition is used to prevent liquid leakage, then liquid leakage is solved, but workability and ease of coating/impregnation deteriorate
Solution Approach 1:
The patent changes the physical state parameter of the electrolyte from solid to liquid by using a polyether compound with controlled molecular weight and specific structural features (oxirane monomer units, cationic groups). This allows the electrolyte to be applied in liquid form for easy coating and impregnation, then transformed into a gel state for liquid leakage prevention.
Solution Approach 2:
The patent creates a composite gel electrolyte system combining a polyether compound (liquid component) with gel-forming capabilities. This composite structure integrates the fluidity and ease of application of liquids with the shape retention and leakage prevention of gels, resolving the contradiction between workability and reliability.
2Reliability
If a liquid electrolyte is used to achieve good ion conductivity, then ion conductivity is improved, but liquid leakage and handling difficulties occur
Solution Approach 1:
The patent introduces a dynamic state transition capability to the electrolyte, allowing it to be in liquid form during application (easy handling) and transform to gel form during operation (leakage prevention). The polyether compound's molecular structure enables this dynamic behavior, maintaining ion conductivity while improving handling ease.
3Shape
If the polyether compound has high molecular weight to improve shape retention, then shape retention is improved, but ion conductivity deteriorates
Solution Approach 1:
The patent optimizes the molecular weight parameter of the polyether compound to a specific range that balances shape retention and ion conductivity. Additionally, the introduction of gel formation capability provides an alternative mechanism for shape retention that does not rely solely on high molecular weight, thereby maintaining ion conductivity.
Solution Approach 2:
The patent creates a composite system where the polyether compound works synergistically with gel-forming components. This composite approach provides shape retention through the gel network structure rather than relying exclusively on high molecular weight polyether, thus preserving ion conductivity while achieving adequate shape retention.
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 cross-linked polyether compound provides an electrolyte with improved shape retention and ion conductivity, enabling easier coating and impregnation in electrochemical devices without liquid leakage.
Implementation Method 1
a composition obtained by blending a cross-linking agent into a polyether compound... by cross-linking it after working, the shape retention can be improved
Implementation Method 2
a polyether compound which can give an electrolyte which is excellent in shape retention and ion conductivity
Data Source
AI summary
A polyether compound containing oxirane monomer units in an average number per molecule of 5 to 200, wherein the polyether compound has a cationic group and cross-linkable group in the oxirane monomer units, and a cross-linkable composition containing this polyether compound and a cross-linking agent which enables cross-linking of the cross-linkable groups of the polyether compound are provided.