Ionic Copolymer Electrolyte Membranes with Tunable Ion Transport
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Solution Overview
Problem
The performance of polymer-based electrolyte membranes in electrochemical cells is influenced by their physical and chemical characteristics, which current technologies have not adequately addressed.
Innovation Solution
Compositions comprising first and second polymeric structures, each potentially including ionizable or ionic moieties, are developed, which can be formed into films, membranes, or cross-linked polymeric matrices, and are used to create electrochemical cells with improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polymer-based electrolyte membranes are used in electrochemical cells, then the cells can operate with polymeric structures, but the performance is not adequately optimized due to limited control over physical and chemical characteristics
Solution Approach 1:
The patent applies parameter changes by systematically varying the chemical structure of polymeric units, including the type of ionizable groups (sulfonic acid, carboxylic acid, phosphonic acid), the nature of aromatic rings, and the configuration of side chains. These structural parameter changes enable precise control over membrane properties such as ion conductivity, mechanical strength, and thermal stability, thereby optimizing electrochemical cell performance.
Solution Approach 2:
The patent employs composite materials by combining different polymeric units with distinct functions within the same membrane structure. The membrane comprises repeating units with ionizable groups for ion transport, aromatic rings for structural stability, and various side chains for tuning physical properties. This composite polymeric structure allows simultaneous optimization of multiple performance characteristics that cannot be achieved with single-component polymers.
2Reliability
If ionizable or ionic moieties are incorporated into polymeric structures, then the functionality and efficiency of electrochemical cells are improved, but the structural complexity of the polymer increases
Solution Approach 1:
The patent applies segmentation by dividing the polymeric membrane into distinct functional segments or repeating units. Each unit contains specific ionizable groups (such as sulfonic acid at R7′ or carboxylic acid at R8′) separated by aromatic rings and side chains. This segmented structure allows independent optimization of ion transport regions and structural support regions, managing complexity through functional modularity.
Solution Approach 2:
The patent implements local quality by placing specific ionizable groups and functional moieties at particular positions within the polymeric structure. For example, electron-withdrawing groups are positioned at R7′ and R8′ to enhance ion dissociation, while aromatic rings at specific locations provide structural rigidity. This localized functional differentiation optimizes performance without requiring complete structural redesign throughout the entire polymer.
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 compositions enhance the performance of electrochemical cells by incorporating ionizable or ionic moieties, leading to improved functionality and efficiency.
Implementation Method 1
compositions including a first polymeric structure and a second polymeric structure, in which at least one of these can include an ionizable moiety or an ionic moiety
Implementation Method 2
The compositions enhance the performance of electrochemical cells by incorporating ionizable or ionic moieties, leading to improved functionality and efficiency
Data Source
AI summary
The present disclosure relates to compositions including a first polymeric structure having a structure of Formula (I), (II), (III), (IV), or (V):or a salt thereof, and a second polymeric structure having a structure of Formula (X) or Formula (XI):or a salt thereof, in which at least one of these can include an ionizable moiety or an ionic moiety, for use in an electrochemical cell. Materials, devices, and methods using such compositions are also described.