Electrolyte Additives Suppress Resistance Increase During Storage
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Solution Overview
Problem
Batteries experience an increase in resistance during storage, which is not effectively addressed by existing technologies.
Innovation Solution
The use of an electrolyte solution containing a solvent, an electrolyte salt, and specific compounds represented by formulas (1) and (2), which form a coating film on electrodes to improve wettability and reduce resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolyte solutions are used, then the battery can operate, but resistance increases during storage
Solution Approach 1:
The patent applies preliminary action by adding specific compounds ( formulas (1) and (2) ) to the electrolyte solution before storage. These compounds proactively form protective films on the electrode surfaces during initial charging cycles, preventing resistance increase during subsequent storage periods. The compounds are incorporated in advance at concentrations of 0.01-10 wt% to establish protective mechanisms before storage begins.
Solution Approach 2:
The patent uses compounds represented by formulas (1) and (2) as intermediary substances between the electrolyte solution and the electrodes. These intermediary compounds form interfacial films that mediate the interaction between the electrolyte and electrode surfaces, preventing direct harmful reactions that would increase resistance during storage. The intermediaries include specific cyclic carbonate and chain carbonate compounds with defined molecular structures.
2Power
If the battery is designed for high capacity and output, then it can power various applications, but resistance increase during storage becomes more significant
Solution Approach 1:
The patent applies parameter changes by modifying the electrolyte solution composition to include specific compounds (formulas (1) and (2)) at optimized concentrations of 0.01-10 wt%. This parameter modification changes the interfacial properties between electrolyte and electrodes, forming protective films that maintain low resistance during storage while preserving the high power and capacity characteristics needed for electric vehicles and power storage systems.
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
This solution effectively suppresses the increase in resistance during storage, enhancing the performance and longevity of batteries.
Implementation Method 1
form a coating film on electrodes to improve wettability and reduce resistance
Implementation Method 2
improve wettability
Data Source
AI summary
A battery includes a positive electrode, a negative electrode, and an electrolyte. The electrolyte includes an electrolyte solution containing a solvent, an electrolyte salt, and a compound having a predetermined structure.