Electrochemically Active Conjugate for Stable Battery Electrodes
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Solution Overview
Problem
Existing electrochemical energy storage devices, particularly those using conducting polymers like polypyrrole, face issues with stability, degradation, and limited realizable capacity due to insufficient porosity and conductivity, leading to poor performance in charge-discharge cycling.
Innovation Solution
The development of electrochemically active conjugates with electroactive moieties covalently linked to conductive polymers, such as polypyrrole, using multidentate ligands and stable covalent bonds, enhances electrical contact and accessibility, combined with conductive additives and binders to create high-performance electrodes for batteries and supercapacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conducting polymers like polypyrrole are used as electrode materials, then high specific energy and reversible redox chemistry are achieved, but stability and resistance to degradation are poor
Solution Approach 1:
The patent combines conducting polymers with inorganic transition metal oxide materials to create composite electrode structures. The inorganic component provides structural stability and resistance to degradation, while the conducting polymer contributes high specific energy and reversible redox chemistry. This composite approach allows both materials to complement each other's strengths and mitigate各自的 weaknesses.
2Quantity of substance
If inorganic transition metal oxide materials are used for high capacity energy storage, then high capacity is achieved, but inability to withstand rapid charge response and loss of capacity after long cycling occur
Solution Approach 1:
The patent creates a hybrid electrode structure where inorganic transition metal oxide particles are dispersed within a conducting polymer matrix. The conducting polymer phase provides rapid electron transport pathways and ionic conductivity, enabling fast charge response, while the inorganic particles provide high capacity energy storage. This local differentiation of functions resolves the contradiction between capacity and charge response speed.
3Ease of manufacture
If organic materials are used for ease of preparation and high energy density, then ease of manufacture and energy density are improved, but susceptibility to degradation and limited stability remain
Solution Approach 1:
The patent creates composite electrodes combining organic conducting polymers with inorganic transition metal oxides. The conducting polymer provides ease of preparation through electrochemical synthesis and high energy density, while the inorganic component enhances structural stability and resistance to degradation. This composite structure allows the organic material's manufacturing advantages to be retained while mitigating its stability limitations.
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
This approach results in improved power, high reversibility, and nearly complete utilization of electrochemically active moieties, achieving capacities close to theoretical limits while maintaining mechanical stability and flexibility, overcoming the limitations of previous polymer-based electrodes.
Implementation Method 1
These polymers can be charged and discharged by a redox reaction, which is accompanied by inserting/de-inserting, both lithium ions and counter anions in the electrolyte.
Implementation Method 2
These polymers can be charged and discharged by a redox reaction, which is accompanied by inserting/de-inserting, both lithium ions and counter anions in the electrolyte.
Implementation Method 3
Among, these organic materials, conducting polymers were suggested to be most probable candidates for their high electronic conductivity and reversible redox-active chemistry
Data Source
AI summary
This invention relates to the field of energy storage devices, and especially electrochemical energy storage devices where an electroactive moiety is chemically attached to a conductive polymer In particular, the invention relates to the design and fabrication of electrodes for the use in electrochemical storage devices having an electrochemically active conjugate. The electrochemically active conjugate preferably has an electroactive moiety selected from electroactive metal center, an electroactive organic species, or an electroactive non-metal species. Depending on the selected electroactive moiety, it can be attached either directly or through an appropriate linker to the conductive polymer.