Electrolytic Solution with Fluorine and Nitrile Compounds for Battery Cycle Life
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Solution Overview
Problem
Lithium ion secondary batteries face challenges in improving cycle properties due to limitations in existing electrolytic solutions, which affect their performance and longevity.
Innovation Solution
Incorporating an unsaturated fluorine compound represented by formula (1) and a nitrile compound represented by formula (2) into the electrolytic solution, enhancing the chemical reactivity and coating film formation on electrodes, thereby improving cycle properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolytic solutions are used in lithium ion secondary batteries, then the battery can operate with basic performance, but the cycle properties deteriorate due to insufficient chemical reactivity and poor coating film formation on electrodes
Solution Approach 1:
The patent modifies the chemical composition parameters of the electrolytic solution by introducing specific compounds (formula 1 with fluorine and formula 2 with nitrile group) to enhance chemical reactivity and improve coating film formation on electrodes, thereby resolving the contradiction between basic operation and poor cycle properties
Solution Approach 2:
The patent creates a composite electrolytic solution system by combining multiple components including the fluorine-containing compound (formula 1), nitrile compound (formula 2), and other electrolyte additives, where the synergistic interaction between these compounds improves both chemical reactivity and coating film quality, achieving better cycle properties
2Reliability
If existing electrolytic solution compositions are used, then the battery structure remains simple and easy to manufacture, but the performance and longevity deteriorate due to limitations in chemical reactivity
Solution Approach 1:
The patent enhances longevity by changing the chemical parameters of the electrolytic solution through the introduction of fluorine-containing compound (formula 1) and nitrile compound (formula 2), which improve chemical reactivity and coating film formation without requiring complex structural modifications to the battery system
Solution Approach 2:
The fluorine-containing compound and nitrile compound act as intermediary substances in the electrolytic solution that facilitate better interaction between the electrolyte and electrode surfaces, improving chemical reactivity and coating film quality while maintaining relative simplicity in the overall battery structure
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 combination of these compounds in the electrolytic solution significantly enhances the cycle properties of lithium ion secondary batteries by improving chemical reactivity and coating film formation, leading to better performance and longevity.
Implementation Method 1
Incorporating an unsaturated fluorine compound represented by formula (1) and a nitrile compound represented by formula (2) into the electrolytic solution, enhancing the chemical reactivity and coating film formation on electrodes
Data Source
AI summary
A battery is provided with a positive electrode, a negative electrode and an electrolyte. In the battery, a first compound that is an unsaturated fluorine compound and a second compound that is a nitrile compound are contained.