Nonaqueous Electrolyte Additives for Low-Resistance Battery Films
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Solution Overview
Problem
Existing nonaqueous electrolyte solution batteries face challenges with high initial resistance values, which affect their performance and efficiency.
Innovation Solution
A nonaqueous electrolyte solution containing specific compounds represented by Formulas (1) and (2), which decompose on the electrodes to form a film with good cation conductivity, reducing initial resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vinylene carbonate is added to form a polymer film coating on the electrode surface to prevent electrolyte decomposition, then storage characteristics at high temperature are improved, but lithium ion passage is hindered causing increased internal resistance and gas generation
Solution Approach 1:
The patent introduces a novel compound with specific molecular structure (Formula 1) containing both vinylene carbonate units and fluorinated cyclic carbonate units, changing the chemical composition parameters of the film-forming additive to achieve balanced performance
Solution Approach 2:
The patent creates a composite film structure by incorporating fluorinated cyclic carbonate units into the vinylene carbonate polymer matrix, forming a composite material that combines the protective properties of PVC with the high ionic conductivity of fluorinated cyclic carbonate derivatives
2Reliability
If vinylene carbonate is added to form a polymer film coating on the electrode surface to prevent electrolyte decomposition, then storage characteristics at high temperature are improved, but gas generation occurs during storage at high temperature
Solution Approach 1:
The patent modifies the film composition by incorporating fluorinated cyclic carbonate units which change the chemical stability parameters of the coating, reducing gas-generating side reactions while maintaining protective functions
Solution Approach 2:
The patent converts the potential harm of gas generation into a benefit by using the fluorinated cyclic carbonate units to suppress parasitic reactions that produce gas, while the same units contribute to forming a stable, low-resistance film
3Reliability
If carbamyl phosphonate derivatives or sulfone compounds are added to the electrolyte solution, then flame retardancy and storage characteristics are improved, but initial resistance value increases
Solution Approach 1:
The patent changes the chemical structure parameters of the film-forming additive by incorporating fluorinated cyclic carbonate units, which have high ionic conductivity properties that counteract the resistance-increasing effect of carbamyl phosphonate or sulfone compounds
Solution Approach 2:
The patent creates a composite film structure combining vinylene carbonate and fluorinated cyclic carbonate units, where the fluorinated cyclic carbonate component provides high ionic conductivity pathways that compensate for the resistance increase caused by other additives
4Object-affected harmful factors
If carbamyl phosphonate derivatives or sulfone compounds are added to the electrolyte solution, then flame retardancy is improved, but initial resistance value increases
Solution Approach 1:
The patent modifies the film composition parameters by adding fluorinated cyclic carbonate units that provide high ionic conductivity, compensating for the resistance increase caused by flame-retardant additives
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 proposed solution achieves a low initial resistance value in nonaqueous electrolyte solution batteries, improving their charge and discharge efficiency and maintaining discharge capacity over time.
Implementation Method 1
a nonaqueous electrolyte solution containing: (I) at least one selected from the group consisting of a compound represented by Formula (1) and a compound represented by Formula (2)... which decompose on the electrodes to form a film with good cation conductivity
Data Source
AI summary
A nonaqueous electrolyte solution containing: at least one selected from the group with a compound represented by Formula described in the specification, and a compound represented by Formula described in the specification; a nonaqueous electrolyte solution battery including at least a positive electrode, a negative electrode, and the nonaqueous electrolyte solution; and a method for producing a nonaqueous electrolyte solution battery using the nonaqueous electrolyte solution.