Boron Additive Electrolyte for Lithium Battery Resistance Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Lithium secondary batteries using nonaqueous electrolyte solutions face challenges in reducing initial battery resistance and preventing increases in resistance due to storage.
Innovation Solution
A nonaqueous electrolyte solution comprising a boron compound (additive A) with a high reductive decomposition potential and a compound (additive B) with a lower reductive decomposition potential, where the difference in potentials ranges from 0.1 V to 1.5 V, is used to decrease initial battery resistance and suppress resistance increases during storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolyte solutions are used, then the battery can operate, but the initial battery resistance is high and increases during storage
Solution Approach 1:
The patent changes the chemical composition parameters of the electrolyte solution by introducing specific boron compounds (additive A) and compounds with lower reductive decomposition potential (additive B) in controlled ratios. This compositional parameter change modifies the electrochemical properties of the electrolyte, resulting in decreased initial battery resistance and suppressed resistance increase during storage, thereby resolving the technical contradiction between operational functionality and resistance stability.
2Duration of action of stationary object
If storage time is extended, then the battery can be used later, but the battery resistance increases due to storage
Solution Approach 1:
The patent applies preliminary action by incorporating specific additive combinations (boron compound additive A and lower potential compound additive B) into the electrolyte solution before storage. These additives pre-establish a stable electrochemical environment that prevents resistance increase during storage. The synergistic interaction between additives A and B creates a protective effect that maintains battery resistance stability throughout the storage period, enabling long-term storage without performance 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 solution effectively decreases initial battery resistance and prevents increases in resistance due to storage, enhancing the performance and durability of lithium secondary batteries.
Implementation Method 1
an additive A composed of a boron compound represented by the following Formula (1); and an additive B composed of a compound having a lower reductive decomposition potential than the additive A
Data Source
AI summary
Provided is a nonaqueous electrolyte solution for batteries, which contains an additive A that is composed of a boron compound represented by formula (1), and an additive B that has a lower reductive decomposition potential than the Additive A, in which n represents an integer from 1 to 5, M+ represents an Li+ ion or an H+ ion, and when n is an integer from 2 to 5, more than one M+ may be the same as or different from each other.