Organic Electrodes with Conjugated Rings for High Energy Density
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Solution Overview
Problem
Current organic intercalating materials for lithium-ion batteries face challenges in achieving high volumetric energy density, cyclability, and conductivity, limiting their application in energy storage devices.
Innovation Solution
Development of electrodes using specific organic compounds and polymers with conjugated organic rings and heteroaryl moieties, which enhance charge capacity, operating voltage, and conductivity, and incorporation of carbon-based high-surface additives like graphene to improve performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If organic intercalating materials are used in electrodes, then production costs are reduced and theoretical capacity is increased, but volumetric energy density and cyclability deteriorate
Solution Approach 1:
The patent employs composite materials by combining organic intercalating compounds with inorganic components or conductive additives to create hybrid electrode materials. This composite approach allows the electrode to benefit from the high theoretical capacity and low cost of organic materials while the inorganic components provide structural stability to prevent dissolution and improve cyclability.
2Quantity of substance
If organic intercalating materials are used in electrodes, then production costs are reduced, but volumetric energy density deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the molecular structure, size, and packing arrangement of organic intercalating materials to increase their volumetric energy density. By optimizing parameters such as molecular weight, ring structure, and intercalation stoichiometry, the electrode achieves higher energy density while maintaining the cost advantages of organic materials.
3Adaptability or versatility
If organic intercalating materials are used in electrodes, then scarce elements are avoided, but conductivity deteriorates
Solution Approach 1:
The patent introduces conductive intermediaries such as carbon black, graphene, or conductive polymers into the electrode structure. These intermediary materials form a conductive network that facilitates electron transport through the organic intercalating materials, which inherently have low conductivity. This allows the electrode to maintain versatility and avoid scarce elements while achieving adequate conductivity through the intermediary conductive phase.
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 proposed solution achieves energy densities of >= 500Wh/kg with improved cyclability and conductivity, making them a viable alternative to inorganic batteries for energy storage applications.
Implementation Method 1
at least one species of monomeric subunits which are represented by the formulas (1) to (3) and wherein Cy is a 5- or 6-membered conjugated organic ring or a combination of two or more fused 5- or 6-membered conjugated organic rings
Implementation Method 2
a polymer that has carbonyl functions which can be reduced and intercalates lithium ions
Data Source
AI summary
The present invention relates to a material for an energy storage device and the use of said material in organic electrodes. Additionally the invention relates to compounds and polymers comprised within said material and to devices for storage of electric energy which use organic electrodes according to the invention.