Triazine Polymer Electrodes for Higher-Energy Supercapacitors
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Solution Overview
Problem
Traditional capacitors have limited energy density, ranging from 10^-12 to 10^-3 farads, while supercapacitors with large surface area carbon electrodes can achieve higher energy densities, but there is a desire to further improve this capacity.
Innovation Solution
The development of triazine-based polymers formed by polymerizing an electrophilic nitrogen containing heterocycle with an electron rich aromatic compound, using a method that involves heating the mixture with an acid-based catalyst, to create a polymer film with enhanced energy storage capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If traditional metal electrode plates are used, then the device structure is simple, but the energy density is limited (10^-12 to 10^-3 F)
Solution Approach 1:
The patent employs composite materials by combining conductive polymers (polyaniline, polypyrrole, polythiophene) with traditional metal electrodes or carbon materials. This composite approach enables the electrode to simultaneously achieve high surface area for energy storage and structural integrity, resolving the contradiction between energy density improvement and device complexity
Solution Approach 2:
The patent utilizes porous carbon electrodes with large surface areas to significantly increase energy density. The porous structure provides extensive surface area for charge storage while maintaining a relatively simple overall device structure, thus improving energy density without proportionally increasing complexity
2Quantity of substance
If large surface area carbon electrodes are used to achieve supercapacitor performance, then energy density improves (hundreds to thousands of farads), but the device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent changes the chemical and physical parameters of the electrode materials by synthesizing conductive polymers with specific molecular structures and controlling their oxidation states. This allows tuning of electrical conductivity and capacitance properties to achieve high energy density while using more manufacturable processes compared to assembling complex carbon electrode structures
Solution Approach 2:
The patent replaces mechanical assembly of complex carbon electrode structures with chemical synthesis methods for producing conductive polymers. The polymerization process occurs in solution and can be applied through coating or infiltration techniques, simplifying manufacturing compared to precise mechanical assembly of carbon materials
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 resulting polymer films demonstrate an energy density of greater than or equal to 150 kJ/kg, significantly improving the energy storage capacity of capacitors compared to traditional materials.
Implementation Method 1
polymerizing at least some of the first monomer and second monomer or mixtures of monomer to form a polymer, wherein polymerizing comprises heating the mixture to greater than or equal to 60° C. in the presence of an acid-based catalyst
Implementation Method 2
polymerizing comprises heating the mixture to greater than or equal to 60° C.
Data Source
AI summary
Compositions and methods related to conducting polymeric compositions that can be used in devices for storage of electrical energy are generally provided. The composition may include redox active polymers that include an electrophilic nitrogen containing heterocycle and an electron rich aromatic compound. The electroactive polymers may be formed by polymerizing an electrophilic nitrogen containing heterocycle-based unit with an electron rich aromatic compound in the presence of heat and an acid-based catalyst. The resulting electroactive polymers may be suitable as polymer films for use as electrodes in energy storage devices. The polymer films disposed as electrodes can improve the energy density of such devices.