Crosslinked Siloxane-Polyoxyethylene Electrolyte for Ion Conductivity
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Solution Overview
Problem
Conventional lithium batteries have limitations in electrical properties, necessitating improvements in energy density and ion conductivity.
Innovation Solution
A crosslinking reaction between a modified polyoxyethylene-based material and a siloxane-based material is used to form an electrolyte composition, reducing crystallinity and enhancing ion conductivity by creating additional transmission channels for conductive ions, such as lithium ions, through heating the mixture at 50-60°C for 3-5 hours.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lithium battery electrolytes are used, then the battery structure is simple, but the electrical properties and ion conductivity are insufficient
Solution Approach 1:
The patent uses a composite electrolyte system combining polyoxyethylene-based material with siloxane-based materials (POSS or derivatives). This composite structure integrates the ion-conducting channels of polyoxyethylene with the crosslinking capability of siloxane, achieving both high ion conductivity and structural stability without excessive complexity
Solution Approach 2:
The patent modifies the polyoxyethylene material by introducing amine groups at the tail end, changing its chemical parameters to enable crosslinking reactions. This parameter modification transforms the electrolyte from a simple polymer to a crosslinked network structure with superior electrical properties
2Reliability
If the polyoxyethylene crystallinity is high, then the material structure is stable, but the ion transmission channels are blocked and conductivity decreases
Solution Approach 1:
The crosslinking reaction between amine groups and siloxane changes the physical state of polyoxyethylene from crystalline to amorphous. This parameter change in structural organization opens up ion transmission channels while the crosslinked network maintains compositional stability
Solution Approach 2:
The siloxane-based material acts as an intermediary that induces crosslinking in the polyoxyethylene chain. This intermediary facilitates the transformation from crystalline to amorphous structure, creating conductive pathways without compromising overall material stability
3Quantity of substance
If solid-state electrolytes are used, then the energy density is improved, but the charge and discharge properties at room temperature are insufficient
Solution Approach 1:
The composite of polyoxyethylene and siloxane creates a solid-state electrolyte with dual functionality: the polyoxyethylene provides ion-conducting channels for high energy density, while the siloxane crosslinks provide structural integrity and room-temperature conductivity
Solution Approach 2:
The crosslinked amorphous structure creates a porous network with numerous ion transmission channels. This porous architecture allows efficient ion transport at room temperature while maintaining the solid-state structure for high energy density
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 electrolyte composition improves the electrical properties of energy storage devices, enabling commercially acceptable charge and discharge properties at room temperature, surpassing the limitations of existing solid-state electrolytes by facilitating easier ion conduction.
Implementation Method 1
heating the mixture at a temperature ranging from 50 to 60° C. for a time ranging from 3 to 5 hours for obtaining an electrolyte composition, wherein the electrolyte composition is formed by bonding the amine group of the modified polyoxyethylene-based material to the siloxane-based material
Implementation Method 2
heating the mixture at a temperature ranging from 50 to 60° C. for a time ranging from 3 to 5 hours
Data Source
AI summary
An electrolyte composition, a method of fabricating the same, and an energy storage device with the electrolyte composition are provided. The method of fabricating an electrolyte composition has steps of: mixing a modified polyoxyethylene-based material and a siloxane-based material in a solvent to form a mixture in which a tail end of a group of the modified polyoxyethylene-based material has an amine group; and heating the mixture at a temperature ranging from 50 to 60° C. for a time ranging from 3 to 5 hours for obtaining an electrolyte composition, where the electrolyte composition is formed by bonding the amine group of the modified polyoxyethylene-based material to the siloxane-based material. The electrolyte composition enables conductive ions to conduct in an electrolyte easily.