Silicon-Containing Sulfonate Additive for Electrolyte Voltage Stability
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Solution Overview
Problem
Existing electrolyte solutions for electric storage devices face challenges in maintaining high withstand voltage, especially at high temperatures and voltages, with ionic liquids offering high withstand voltage but poor ionic conductivity at low temperatures.
Innovation Solution
Incorporating a silicon-containing sulfonate anion compound as an additive into the electrolyte solution, paired with monovalent or polyvalent cations, to enhance the electrolyte solution's withstand voltage, thereby improving the performance of electric storage devices like secondary batteries and capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If organic solvent and ionic conductive salt are used for high voltage operation, then energy density is improved, but electrical decomposition occurs on electrode surface
Solution Approach 1:
The patent introduces ionic liquid as an intermediary substance that forms a protective interface layer on the electrode surface, preventing direct contact and electrical decomposition between the organic solvent/electrolyte salt system and the electrode, thereby enabling high voltage operation without degradation
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 silicon-containing sulfonate anion additive increases the operational upper limit voltage and energy density of electric storage devices while reducing deterioration from repeated charge/discharge cycles, maintaining improved performance across a range of temperatures.
Implementation Method 1
the silicon-containing sulfonate anion additive increases the operational upper limit voltage
Data Source
AI summary
The withstand voltage of an electrolyte solution is able to be increased by adding an additive for electrolyte solutions, which is composed of a compound that is configured from a silicon-containing sulfonate anion represented by formula (1) and a cation of, for example, a quaternary ammonium salt or a quaternary phosphonium salt, into the electrolyte solution.In the formula, each R independently represents an alkyl group having 1-8 carbon atoms; and n represents an integer of 2-6).