Cross-linked Glyceryl Ether Epoxy Resin for High-Voltage Batteries
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Solution Overview
Problem
Conventional glyceryl ether epoxy resins with ether oxygen groups have low oxidation potential, leading to decomposition when used with high-voltage cathode materials, limiting the improvement of battery output voltage and energy density in flexible lithium-ion batteries.
Innovation Solution
A cross-linked glyceryl ether epoxy resin is developed through a ring-opening reaction between a glyceryl ether polymer and a polyamine compound, forming a three-dimensional network structure that restricts the movement of hydroxyl groups, thereby enhancing oxidation stability and achieving an oxidation potential of 4.36V.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional glyceryl ether epoxy resin is used, then flexibility and processability are improved, but oxidation potential remains low leading to decomposition at high voltage
Solution Approach 1:
The patent creates a cross-linked composite structure by reacting glyceryl ether polymer with polyamine compound, forming a three-dimensional network that combines the flexibility of ether groups with the oxidation stability of cross-linked hydroxyl groups. This composite approach resolves the contradiction between ease of operation and reliability.
Solution Approach 2:
The patent changes the chemical structure parameters by introducing cross-linking through polyamine compounds, transforming the linear glyceryl ether polymer into a three-dimensional network structure. This parameter change increases oxidation potential from conventional levels to 4.36V while preserving flexibility.
2Reliability
If cross-linked structure is formed, then oxidation stability is improved, but mechanical properties must be maintained
Solution Approach 1:
The patent optimizes the cross-linking density and network structure parameters by controlling the reaction between glyceryl ether polymer and polyamine compound. This parameter optimization achieves high oxidation stability (4.36V) while maintaining flexible mechanical properties suitable for wearable devices.
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 cross-linked glyceryl ether epoxy resin exhibits improved oxidation stability and compatibility with Li metal anodes, resulting in stable voltage curves and prolonged cycle performance, even at high current densities, and maintains excellent mechanical properties.
Implementation Method 1
a ring-opening reaction of a glyceryl ether polymer and a polyamine compound
Data Source
AI summary
A glyceryl ether epoxy resin and a method of making it are provided. The glyceryl ether epoxy resin is a cross-linked polymer obtained by a ring-opening reaction of a glyceryl ether polymer and a polyamine compound. The glyceryl ether polymer is a glycidyl ether polymer comprising at least two epoxy groups, and the polyamine compound comprises at least two amine groups. The cross-linked polymer is a cross-linked three-dimensional network structure, the cross-linked polymer comprises a main chain and a plurality of hydroxyl groups, and the plurality of hydroxyl groups are located on the main chain. An epoxy structure of the glyceryl ether polymer is located on the main chain.