Organosilicon Amine Electrolyte with Polyether Chain for Lithium Battery Safety
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Solution Overview
Problem
Current lithium ion battery electrolytes based on organic carbonate compounds pose safety hazards due to high flammability, limiting their application in high-safety and high-rate discharge applications, such as hybrid and electric vehicles, and require the development of safer and more environmentally friendly alternatives.
Innovation Solution
An organosilicon amine electrolyte material with a polyether chain is developed, which provides improved thermal stability, ionic conductivity, and electrochemical stability by complexing with lithium ions and neutralizing acidic substances, and can be used as an electrolyte or additive in lithium batteries, as well as in other electrochemical energy storage devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If organic carbonate based electrolyte materials are used, then ionic conductivity and electrochemical performance are improved, but flammability increases and safety deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the electrolyte by introducing organosilicon compounds with specific molecular structures (containing Si-O-Si bonds and functional groups like -OH, -OCH3, -OCF3) to replace part of the traditional organic carbonate electrolyte. This compositional parameter change reduces flammability while maintaining ionic conductivity through the unique properties of silicon-oxygen bonds and functional group interactions with lithium ions.
Solution Approach 2:
The invention creates a composite electrolyte system by combining organosilicon compounds with traditional carbonate solvents (EC, DEC, DMC) and lithium salts (LiPF6). This composite approach integrates the high ionic conductivity of carbonates with the thermal stability and low flammability of organosilicon materials, achieving both performance and safety requirements.
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 organosilicon amine electrolyte material enhances the performance and safety of lithium batteries by reducing flammability, improving high-temperature performance, and extending cycle life, while being environmentally friendly and suitable for various electrochemical energy storage devices.
Implementation Method 1
the polyether chain in the chemical structure of compound provides a complexation point with lithium ions for performing ion transport
Implementation Method 2
an amino group in the chemical structure can eliminate acidic substances generated by LiPF6 hydrolysis of the existing carbonate based electrolyte system
Data Source
AI summary
The invention provides an organosilicon amine electrolyte material containing a polyether chain, which has a wide range of applications, as well as an application of the electrolyte material in a lithium ion battery. The chemical structure thereof is as shown in Formula 1, wherein R1 and R2 are selected from the same or different C1-C10 alkyls; A is a polyether chain segment having the structure of (CH2)nO[(CH2)mO]x(CH2)y, where n and m are integers from 0 to 10, and x is an integer from 1 to 10; R3, R4 and R5 are selected from the same or the different C1-C10 alkyls or alkoxyl groups, or are equivalent to ANR1R2 or —O—SiR6R7R8 in structure; wherein R6, R7 and R8 are C1-C10 alkyls.