Elastomeric Secondary Galvanic Cell With Ionic Liquids
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Solution Overview
Problem
Conventional secondary galvanic cells are rigid, limiting their integration into elastomeric components and reducing durability, and they have environmental compatibility issues due to fluorine-containing polymers like PVDF, which are not truly elastic and suffer from decreased conductivity with increased crosslinking.
Innovation Solution
A secondary galvanic cell comprising a cathode, anode, and separator made from crosslinkable diene rubbers with ionic liquids and electrically conductive polymers, allowing for flexible configurations and improved processing, with fillers like metal-organic frameworks, carbon nanotubes, and silica to enhance performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional rigid polymers like PVDF are used for electrodes and separator, then environmental compatibility deteriorates and true elasticity is lost, but structural stability and conductivity are maintained
Solution Approach 1:
The patent changes the fundamental parameter of polymer elasticity by using crosslinkable diene rubbers instead of rigid polymers like PVDF. The crosslinking process transforms the linear polymer chains into a three-dimensional network, providing both elasticity in the uncured state and structural stability after curing, thus resolving the contradiction between adaptability and reliability
Solution Approach 2:
The patent creates a composite material system combining crosslinkable diene rubber with ionic liquids and electrically conductive polymers. This composite approach allows the elastomeric polymer matrix to provide flexibility and elasticity, while the ionic liquid and conductive polymer components ensure structural stability and electrical conductivity, simultaneously addressing both requirements
2Reliability
If crosslinking density is increased to improve structural stability, then conductivity deteriorates, but elasticity is also reduced
Solution Approach 1:
The patent introduces ionic liquids as an intermediary substance within the crosslinked polymer matrix. These ionic liquids serve as mediators that maintain electrical conductivity pathways even in the crosslinked structure, allowing the system to achieve both structural stability through crosslinking and maintained conductivity through the mobile ionic liquid species
Solution Approach 2:
The patent optimizes the crosslinking degree as a controllable parameter to balance structural stability and conductivity. By precisely controlling the crosslinking process and density, the patent achieves a optimal state where the polymer network provides sufficient mechanical stability while leaving enough space and pathways for ionic liquid movement to maintain conductivity
3Use of energy by moving object
If rigid secondary galvanic cells are used, then energy density is maintained, but integration into elastomeric components is limited and durability is reduced
Solution Approach 1:
The patent fundamentally changes the mechanical parameter of the battery components from rigid to elastomeric by using crosslinkable diene rubbers. This parameter change enables the battery to be integrated into elastomeric components while the crosslinked structure maintains sufficient structural integrity to support energy storage functions
Solution Approach 2:
The elastomeric polymer components serve multiple functions simultaneously: they provide flexibility for integration into elastomeric connections and components, maintain structural stability through crosslinking for durability, and when combined with ionic liquids and conductive polymers, ensure electrical conductivity. This multi-functionality resolves the contradiction between integrability and energy storage capability
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 flexible design enhances environmental compatibility and processing ease, enabling integration into elastomeric components while maintaining or improving energy storage capabilities.
Implementation Method 1
wherein at least one of the first elastomeric polymer, the second elastomeric polymer and the third elastomeric polymer contains an ionic liquid and/or an electrically conductive polymer
Implementation Method 2
the first elastomeric polymer, the second elastomeric polymer and the third elastomeric polymer are independently selected from crosslinkable diene rubbers
Data Source
Figure 1
AI summary
The present invention relates to a secondary galvanic cell comprising a cathode, an anode, and a separator arranged between the cathode and the anode, wherein the cathode comprises a first elastomeric polymer filled with a first filler as the cathode material, wherein the anode comprises a second elastomeric polymer filled with a second filler as the anode material, wherein the separator comprises a third elastomeric polymer, wherein the first elastomeric polymer, the second elastomeric polymer, and the third elastomeric polymer are selected independently of one another from crosslinkable diene rubbers, and wherein at least one of the first elastomeric polymer, the second elastomeric polymer, and the third elastomeric polymer contains an ionic liquid and/or an electrically conductive polymer.The present invention further relates to a rechargeable battery comprising the secondary galvanic cell according to the invention, a method for producing a secondary galvanic cell, and the use of the secondary galvanic cell and the rechargeable battery according to the invention.