Cyclic Ether Electrolyte for Secondary Battery Cyclic Stability
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Solution Overview
Problem
Current secondary batteries face challenges in achieving superior battery characteristics, particularly in terms of cyclic performance and temperature stability, due to frequent charge and discharge cycles and exposure to varying environmental temperatures, which affect their energy density and lifespan.
Innovation Solution
Incorporating a cyclic ether compound with a specific skeletal structure and substituent groups into the non-aqueous electrolytic solution, which includes a carbon-carbon multiple bond bonded to an ether bond, to enhance the reactivity and coordination of electrode reactants, thereby improving the battery's cyclic characteristics and resistance to decomposition reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a secondary battery is used for frequent charge and discharge cycles, then battery capacity is utilized, but cyclic performance deteriorates
Solution Approach 1:
The patent modifies the chemical structure of cyclic ether compounds by introducing specific substituent groups (Formula 1) at defined positions (Formula 2) to optimize electrolyte performance for frequent cycling operations
Solution Approach 2:
The electrolytic solution combines multiple components including cyclic ether compounds with specific substituent groups, chain carbonates, and cyclic carbonates to achieve both high productivity and reliability
2Adaptability or versatility
If a secondary battery is exposed to various temperature environments, then adaptability is improved, but battery characteristics deteriorate
Solution Approach 1:
The patent introduces substituent groups with specific structural parameters (Formula 1) into the cyclic ether compound skeleton to enhance temperature stability while maintaining adaptability to various environmental conditions
Solution Approach 2:
The substituent groups are positioned at specific locations (Formula 2) on the cyclic ether compound structure to locally enhance temperature resistance properties without compromising overall battery adaptability
3Reliability
If heterocyclic compounds are used as additives to improve cyclic characteristics, then battery performance is enhanced, but electrolyte composition complexity increases
Solution Approach 1:
The patent optimizes the molecular structure of cyclic ether compounds by introducing specific substituent groups (Formula 1) to achieve improved cyclic characteristics while maintaining relatively simple electrolyte composition
Solution Approach 2:
The modified cyclic ether compound serves multiple functions including improving cyclic characteristics, maintaining stability, and enabling frequent charge-discharge cycles, thereby reducing the need for multiple different 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 use of cyclic ether compounds in the electrolytic solution leads to improved battery performance by suppressing decomposition reactions, maintaining mobility of electrode reactants, and reducing resistance, resulting in enhanced discharge capacity and stability over repeated charge and discharge cycles.
Implementation Method 1
enhance the reactivity and coordination of electrode reactants
Implementation Method 2
The electrolytic solution includes a solvent and an electrolyte salt. A composition of the electrolytic solution that serves as a medium for charge and discharge reactions
Implementation Method 3
includes a carbon-carbon multiple bond (one of —C═C— and —C≡C—) bonded to an ether bond (—O—)
Implementation Method 4
The electrolytic solution includes a solvent and an electrolyte salt. A composition of the electrolytic solution that serves as a medium for charge and discharge reactions
Data Source
AI summary
A secondary battery includes: a cathode; an anode; and non-aqueous electrolytic solution including a cyclic ether compound that includes a skeleton and one or more substituent groups introduced into the skeleton. The skeleton includes one or more four-or-more-membered oxygen-containing rings. The one or more substituent groups each are a monovalent group represented by Formula (1).—X—O—R (1)(X is one of a divalent chain saturated hydrocarbon group, a halide group thereof, and nothing. R is one of a monovalent chain saturated hydrocarbon group, etc. At least one of one or more Rs includes one or more of the monovalent chain unsaturated hydrocarbon group, the monovalent cyclic unsaturated hydrocarbon group, the monovalent oxygen-containing cyclic unsaturated hydrocarbon group, the halide group thereof, and the monovalent group obtained by bonding two or more thereof, and includes a carbon-carbon multiple bond (one of —C═C— and —C≡C—) bonded to an ether bond (—O—).)