Eutectic Electrolyte for Battery Safety and Conductivity
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Solution Overview
Problem
Conventional organic solvents used in electrochemical devices are prone to evaporation, leakage, and flammability, leading to reliability and stability issues, while ionic liquids are expensive and complex to produce, limiting their application in large or thin devices.
Innovation Solution
A cost-efficient eutectic mixture comprising an amide group-containing compound and a lithium-free ionizable salt is used as an electrolyte, providing improved thermal and chemical stability, high conductivity, and a broad electrochemical window, thus enhancing the safety and quality of electrochemical devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organic solvents are used as electrolytes, then ion conductivity is achieved, but evaporation, leakage, and flammability occur leading to poor reliability
Solution Approach 1:
The patent changes the chemical composition parameters of the electrolyte by using a eutectic mixture of acetamide and lithium salt instead of conventional organic solvents. This parameter change eliminates evaporation and flammability while maintaining ion conductivity, directly resolving the contradiction between reliability and harmful factors.
Solution Approach 2:
The patent employs a composite eutectic mixture system combining acetamide and lithium salt in specific ratios. This composite material approach creates a new electrolyte phase that combines the advantages of both components while eliminating their individual disadvantages, achieving high reliability without evaporation or flammability.
2Reliability
If ionic liquids are used as electrolytes, then thermal and chemical stability is improved, but cost increases and preparation complexity increases
Solution Approach 1:
The patent replaces expensive ionic liquids with a cost-effective eutectic mixture of acetamide and lithium salt. This substitution maintains thermal and chemical stability while dramatically reducing material cost and simplifying preparation, directly addressing the contradiction between reliability and ease of manufacture.
Solution Approach 2:
The patent changes the electrolyte composition from complex ionic liquids to a simple eutectic mixture with defined compositional parameters. This parameter change achieves comparable stability while reducing preparation complexity and cost, resolving the contradiction between reliability and ease of manufacture.
3Reliability
If liquid electrolytes are used, then ion conduction is enabled, but leakage risk increases and applicability to large or thin devices is limited
Solution Approach 1:
The patent utilizes the phase transition properties of the eutectic mixture, which maintains liquid state at operating temperatures without the leakage issues of conventional liquid electrolytes. The eutectic composition creates a material with optimized melting point and viscosity characteristics, enabling ion conduction while minimizing leakage risk.
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 eutectic mixture addresses the issues of evaporation, flammability, and conductivity limitations, offering a safer, more reliable, and cost-effective alternative with a broader electrochemical window, suitable for various electrochemical devices.
Implementation Method 1
Electrolytes that have been used the most widely in recent years include non-aqueous solutions containing electrolyte salts dissolved in organic solvents... Such non-aqueous electrolytes have to serve as media performing conduction of ions and electrons between both electrodes
Implementation Method 2
non-aqueous solutions containing electrolyte salts dissolved in organic solvents
Data Source
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Figure 3
AI summary
Disclosed is an electrolyte comprising a eutectic mixture formed of: (a) an amide group-containing compound; and (b) a lithum-free ionizable salt. An electrochemical device comprising the electrolyte is also disclosed. The electrolyte improves the quality of and electrochemical device due to the excellent conductivity of the metal cation contained in the eutectic mixture, a broad electrochemical window and low viscosity. Additionally, since the eutectic mixture has excellent thermal and chemical stability, it is possible to solve the problems of evaporation, exhaustion and ignition of electrolytes, to minimize side reactions between constitutional elements of the device and the electrolyte, and to improve the safety of the electrochemical device.