Solid Polymer Electrolyte Composition for Higher Ionic Conductivity
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Solution Overview
Problem
Traditional polymer electrolytes exhibit reduced ionic conductivity, limiting their effectiveness in secondary batteries.
Innovation Solution
Incorporating a charge transfer complex polymer matrix with a halogen functionalized sulfone-based plasticizer molecule additive, enhancing ionic conductivity and dissociation of metal cations in solid polymer electrolytes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional polymer electrolytes are used, then the electrolyte maintains solid-state structure, but ionic conductivity is reduced
Solution Approach 1:
The patent modifies the chemical structure of the polymer electrolyte by introducing charge transfer complexes between electron donors (e.g., polyacetylene, polythiophene) and electron acceptors (e.g., I2, AsF5, BF3). This chemical parameter change creates new conduction pathways that significantly enhance ionic conductivity while preserving the solid-state structure.
Solution Approach 2:
The patent creates a composite polymer electrolyte system combining multiple components: polymer matrix, electron donor molecules, electron acceptor molecules, and metal cations. This composite structure leverages the synergistic effects of charge transfer complexes to achieve both solid-state stability and high ionic conductivity.
2Ease of manufacture
If polymer electrolytes are used instead of liquid electrolytes, then flexibility and processability are improved, but ionic conductivity is reduced
Solution Approach 1:
The patent changes the electrical and chemical parameters of the polymer electrolyte through charge transfer complex formation. The electron acceptor molecules create highly mobile ionic species that dramatically increase conductivity, allowing the solid polymer to match or exceed liquid electrolyte performance while retaining manufacturing advantages.
Solution Approach 2:
The patent replaces the liquid-phase ionic conduction mechanism with a solid-state charge transfer complex mechanism. Instead of relying on liquid mobility, the system uses electronic charge transfer between donor-acceptor pairs to facilitate ion transport, substituting a chemical-electronic mechanism for a purely mechanical/physical one.
3Object-generated harmful factors
If charge transfer complex polymer matrix is used, then ionic conductivity is enhanced, but complexity of composition increases
Solution Approach 1:
The patent incorporates electron acceptor molecules (such as I2, AsF5, BF3) during the polymer electrolyte fabrication process, before the electrolyte is assembled into the battery. This preliminary incorporation ensures uniform distribution and pre-establishes the charge transfer complex structure, simplifying subsequent assembly and reducing processing complexity.
Solution Approach 2:
The charge transfer complex system is designed to self-organize through spontaneous electron transfer between donor and acceptor molecules. The system automatically forms the conductive network without requiring complex external control or additional processing steps, allowing the material to self-optimize its structure for maximum conductivity.
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 solution results in improved ionic conductivity and stability, facilitating efficient metal ion transport through dissociation mechanisms beyond segmental motion, thereby enhancing battery performance.
Implementation Method 1
the charge transfer complex polymer matrix comprises a polar ring polymer matrix with electron donors selected from the group consisting of hydroquinone (HQ), tetrathiafulvalene (TTF), phenoxazine (Px), thianthrene (Th), pyrene (Py), and combinations thereof, and electron acceptors selected from the group consisting of benzoquinone (BQ), Cl, 7,7,8,8-tetracyanoquinodimethane (TCNQ), 2,3-Dichloro-5,6-dicyano-1,4-benzoquinone (DDQ), and combinations thereof
Implementation Method 2
the halogen functionalized sulfone-based plasticizer molecule additive promotes dissociation of metal cations (e.g., Li+) from anions in the solid polymer electrolytes such that conductivity of the metal ions in the solid polymer electrolyte is greater than when the halogen functionalized sulfone-based plasticizer molecule additive is not included
Implementation Method 3
facilitating efficient metal ion transport through dissociation mechanisms beyond segmental motion
Data Source
AI summary
A solid polymer electrolyte includes a charge transfer complex polymer matrix with a polar ring polymer matrix and a halogen functionalized sulfone-based plasticizer molecule additive. In some variations, the halogen functionalized sulfone-based plasticizer molecule additive is selected from one or more CCS(═O)(═O), O═S(═O)(CCl)CCl, and O═S1(═O)CC(BR)Cl.