Fluorinated Electrolyte Solvent for Alkali Metal Anode Cycling
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Solution Overview
Problem
Current electrolytic solutions for lithium-ion secondary batteries with alkali metal-containing negative electrodes do not adequately address the need for improved battery characteristics, particularly in terms of cycle characteristics and high-temperature storage, and alkali metal dissolution/deposition performance.
Innovation Solution
An electrolytic solution containing a solvent with a compound represented by formula (1), where R101 and R102 are C1-C3 non-fluorinated alkyl groups and at least one of R103 to R106 is a halogen atom, is used to enhance the performance of alkali metal ion secondary batteries, with specific solvent compositions and concentrations to improve battery characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional electrolytic solutions are used with alkali metal-containing negative electrodes, then basic battery operation is maintained, but alkali metal dissolution/deposition performance is insufficient
Solution Approach 1:
The fluorinated cyclic carbonate modifies the electrochemical window and interfacial properties of the electrolyte, changing parameters that govern alkali metal dissolution and deposition kinetics, thereby improving productivity without sacrificing reliability
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 solution improves cycle characteristics, high-temperature storage characteristics, and alkali metal dissolution/deposition performance in batteries with alkali metal-containing negative electrodes, enhancing overall battery performance.
Implementation Method 1
the electrolytic solution containing a solvent, the solvent including a compound (1) represented by the following formula (1)
Implementation Method 2
an electrochemical device exhibiting excellent battery characteristics even with a negative electrode containing an alkali metal-containing material
Data Source
AI summary
The disclosure aims to provide an electrolytic solution with which an electrochemical device exhibiting excellent battery characteristics even with a negative electrode containing an alkali metal-containing material can be obtained. Provided is an electrolytic solution which is for use in a battery including a negative electrode containing an alkali metal-containing material, the electrolytic solution containing a solvent, the solvent including a compound (1) represented by the following formula (1):wherein R101 and R102 are each independently a C1-C3 non-fluorinated alkyl group, R103 to R106 are each independently a hydrogen atom or a halogen atom, and at least one selected from R103 to R106 is a halogen atom.