Aromatic Compound Quaternary Carbon Nonaqueous Electrolyte Battery
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Solution Overview
Problem
Nonaqueous electrolyte batteries face challenges in achieving high initial efficiency, overcharge safety, and high-temperature durability due to the irreversible capacity increase and reactivity issues with existing aromatic compounds used in electrolytic solutions.
Innovation Solution
Incorporating a specific aromatic compound with a quaternary carbon atom bonded between two aromatic rings into the electrolytic solution, which reduces oxidation reactions and enhances stability at high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aromatic compounds with alkyl groups are added to electrolytic solutions to improve overcharge safety and durability, then overcharge safety and high-temperature storage characteristics are enhanced, but initial irreversible capacity increases and initial capacity characteristics decrease
Solution Approach 1:
The invention changes the chemical structure parameters of the aromatic compound by introducing a quaternary carbon atom bonded between two aromatic rings. This structural modification alters the compound's reactivity and oxidation resistance, allowing it to provide overcharge safety without the severe irreversible capacity increase associated with conventional aromatic compounds. The specific parameter change in molecular structure resolves the contradiction between safety enhancement and capacity preservation.
Solution Approach 2:
The invention uses a composite approach by combining specific aromatic compounds (with quaternary carbon structure) with nonaqueous solvents and electrolytes to create an optimized electrolytic solution system. This composite formulation achieves synergistic effects where the aromatic compound provides overcharge protection while the overall composition maintains good initial capacity characteristics, resolving the trade-off between safety and performance.
2Stability of the object's composition
If aromatic compounds are added to electrolytic solutions to enhance durability characteristics, then high-temperature storage characteristics improve, but oxidation reactions increase causing capacity deterioration
Solution Approach 1:
The invention modifies the chemical parameters of the aromatic compound by incorporating a quaternary carbon atom bonded between two aromatic rings. This structural parameter change significantly reduces the compound's susceptibility to oxidation reactions while maintaining its ability to enhance high-temperature storage characteristics. The modified structure provides thermal stability without generating harmful oxidation effects.
3Reliability
If conventional aromatic compounds are used in electrolytic solutions to improve safety, then overcharge protection is achieved, but resistance increases causing performance deterioration
Solution Approach 1:
The invention changes the molecular parameters of the aromatic compound by introducing a quaternary carbon structure bonded between two aromatic rings. This structural modification alters the compound's electrical and chemical properties, providing effective overcharge protection while minimizing resistance increase. The specific parameter changes in the molecular structure enable safety enhancement without the performance deterioration associated with conventional aromatic compounds.
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 results in nonaqueous electrolyte batteries with improved initial efficiency, overcharge safety, and high-temperature durability, reducing size and enhancing performance while minimizing capacity and resistance deterioration.
Implementation Method 1
this approach increases the initial irreversible capacity and causes a decrease in initial capacity characteristics... incorporating a specific aromatic compound with a quaternary carbon atom bonded between two aromatic rings into the electrolytic solution, which reduces oxidation reactions and enhances stability at high temperatures
Data Source
AI summary
An object of the invention is to provide nonaqueous electrolyte batteries having high initial efficiency, excellent initial capacity and excellent overcharge safety, and nonaqueous electrolytic solutions realizing such batteries. A nonaqueous electrolytic solution includes an electrolyte and a nonaqueous solvent, and further includes an aromatic compound represented by Formula (I) (in which R1 to R5 are independently hydrogen, a halogen, or an unsubstituted or halogen-substituted hydrocarbon group having 1 to 20 carbon atoms, R6 and R7 are independently a hydrocarbon group having 1 to 12 carbon atoms, at least two of R1 to R7 maybe bonded together to form a ring, and Formula (I) satisfies at least one of the requirements (A) and (B): (A) at least one of R1 to R5 is a halogen, or an unsubstituted or halogen-substituted hydrocarbon group having 1 to 20 carbon atoms, (B) the total number of carbon atoms in R1 to R7 is 3 to 20). A nonaqueous electrolyte battery includes the Nonaqueous electrolytic solution.