Composition, electrolytic solution material, and electrolytic solution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid sulfonylimide salts used in electrolytic solutions experience poor storage stability at high temperatures due to decomposition reactions, which is not adequately addressed by existing compositions.
Innovation Solution
Incorporating an acid component with a specific dissociation constant pKa range (0 to 6.5) at predetermined concentrations, such as amidosulfuric acid, carbonic acid, or phosphoric acid, into the electrolyte solution to enhance storage stability at elevated temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If liquid sulfonylimide salt is used for better handleability, then ease of operation is improved, but storage stability deteriorates at high temperatures due to decomposition reactions
Solution Approach 1:
A carboxylic acid component (acetic acid, propionic acid, or butyric acid) is introduced as an intermediary substance to suppress the decomposition reaction of the sulfonylimide salt. The carboxylic acid acts as a mediator that prevents direct decomposition pathways, thereby maintaining storage stability while preserving the liquid form's operational advantages
Solution Approach 2:
The concentration of the carboxylic acid component is precisely controlled within the range of 10-10000 ppm to optimize the balance between suppressing decomposition and maintaining handleability. This parameter adjustment allows the system to achieve both ease of operation and improved storage stability at high temperatures
2Reliability
If sulfonylimide salt concentration is increased to improve electrolyte performance, then electrolyte effectiveness is improved, but decomposition tendency increases at high temperatures
Solution Approach 1:
The carboxylic acid component serves as a protective intermediary that suppresses the decomposition reaction of sulfonylimide salt even at higher concentrations. By introducing this mediating substance, the system can maintain high electrolyte performance while preventing the harmful decomposition effects that would otherwise occur
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 composition exhibits excellent storage stability even at high temperatures, suppressing decomposition reactions and maintaining stability for extended periods.
Implementation Method 1
an acid component having an acid-dissociation constant pKa of 0 or more and 6.5 or less
Data Source
AI summary
To provide a composition containing a sulfonylimide salt, which has excellent storage stability even at a high temperature and can be used for an electrolytic solution material or an electrolytic solution. The composition contains an electrolyte, a solvent, and an anion component. The electrolyte contains a sulfonylimide salt, the anion component contains an acid component having an acid-dissociation constant pKa (an acid-dissociation constant pKa1 in a first stage for a plurality of ionized acids) of 0 or more and 6.5 or less at a concentration of 50 ppm or more and 10000 ppm or less relative to the electrolyte, a concentration of fluoride ion is 100 ppm or less relative to the electrolyte, and a concentration of sulfate ion is 100 ppm or less relative to the electrolyte.