Lithium Sulfamate Electrolyte for Low-Resistance High-Temperature Cells
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Solution Overview
Problem
Current lithium-ion secondary batteries face challenges in achieving low resistance and improved high-temperature storage characteristics, which are crucial for their application in various fields, including automobiles.
Innovation Solution
An electrolyte solution containing a novel lithium sulfamate compound with specific fluorine-containing substituents is developed, which reduces resistance and enhances high-temperature storage performance by minimizing gas generation and maintaining capacity retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolyte solutions are used, then the battery can operate, but the resistance is high and high-temperature storage characteristics are poor
Solution Approach 1:
The patent introduces a novel lithium sulfamate compound with specific molecular structure parameters (formula (1) with particular R101 and R102 substituents) to change the electrolyte's chemical composition parameters. This parameter change achieves both low resistance and excellent high-temperature storage characteristics, resolving the technical contradiction between these two performance aspects.
2Adaptability or versatility
If battery energy density is increased for reduced weight and size, then application versatility improves, but thermal management and stability become more challenging
Solution Approach 1:
The patent employs a specifically designed lithium sulfamate compound that provides effective thermal management protection during battery operation. The compound's molecular structure (formula (1)) is optimized to handle thermal challenges, enabling the battery to achieve high energy density while maintaining stability and safety for diverse applications including automobiles.
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 solution provides lithium-ion secondary batteries with low resistance and excellent high-temperature storage characteristics, ensuring reliable performance in diverse applications.
Implementation Method 1
electrolyte solution including a compound represented by the following formula (1)... electrochemical device having low resistance
Implementation Method 2
lithium ion secondary battery... maintaining capacity retention
Data Source
AI summary
An electrolyte solution containing a compound represented by the following formula (1). In the formula, R101 and R102 are each individually a substituent such as a C1-C7 alkyl group, the substituent optionally contains at least one divalent to hexavalent hetero atom in a structure or optionally has a structure obtained by replacing at least one hydrogen atom by a fluorine atom or a C0-C7 functional group, and at least one selected from the group consisting of R101 and R102 when both being an alkyl group, contains at least one divalent to hexavalent hetero atom in the structure or has a structure obtained by replacing at least one hydrogen atom by a fluorine atom or a C0-C7 functional group: