Electrolyte Solution Power Performance Stability
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Solution Overview
Problem
Energy storage devices experience degradation in power performance when exposed to elevated temperatures or subjected to repeated charging and discharging, which is not adequately suppressed by using unsaturated sultone compounds as additives in the electrolyte solution.
Innovation Solution
Incorporating specific compounds represented by general formulas (1), (2), and (3) into the electrolyte solution, along with a negative active material of non-graphitizable carbon, to enhance the stability and performance of energy storage devices under elevated temperature conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the electrolyte solution includes only an unsaturated sultone compound as an additive, then the device structure is simple, but power performance degradation is not adequately suppressed
Solution Approach 1:
The patent introduces a multi-component additive system comprising unsaturated sultone compounds, cyclic sulfate compounds, and vinylene carbonate, creating a composite electrolyte formulation that enhances power performance stability without excessive complexity
Solution Approach 2:
The patent assigns specific functional roles to different additives: the unsaturated sultone compound primarily protects electric capacity, the cyclic sulfate compound contributes to overall stability, and vinylene carbonate specifically addresses power performance retention, creating a differentiated functional distribution
Data Source
Figure 1
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AI summary
Provided is an energy storage device including an electrolyte solution including a compound represented by the general formula (1), a compound represented by the general formula (2), and a compound represented by the general formula (3):