Secondary Battery Electrolyte Stabilization via Sulfuric Acid Compounds
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Solution Overview
Problem
Current secondary batteries face limitations in achieving superior battery characteristics, such as high energy density and long cycle life, particularly in diverse applications like electric vehicles and electronic devices, due to challenges in electrolyte stability and energy storage efficiency.
Innovation Solution
A secondary battery configuration featuring a sulfuric acid compound represented by the formula X n+ [M(Rf) a (CN) b (SO 4 ) c ] m- within a film-like outer package, where X n+ is a metal or onium ion, M is a transition metal or Group 13-15 element, Rf is a fluorine group or monovalent fluorinated hydrocarbon, and a, b, c, and m are specific integers, enhancing electrolyte stability and energy storage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrolyte compositions are used, then basic battery operation is achieved, but chemical stability and cycle life are insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the electrolyte composition to include specific compounds (cyclic carbonate esters with 4-10 carbons and chain carboxylate esters with specific structures) and controlling their ratios. This changes the chemical parameters of the electrolyte system to achieve both improved chemical stability and extended cycle life, resolving the contradiction between reliability and composition stability.
Solution Approach 2:
The patent uses composite materials by combining multiple electrolyte components in specific ratios: cyclic carbonate esters (4-10 carbons) at 10-50 vol%, chain carboxylate esters at 30-70 vol%, and other additives. This composite electrolyte formulation synergistically improves chemical stability while maintaining good cycle characteristics, addressing the contradiction between reliability and composition stability.
2Quantity of substance
If higher energy density is pursued, then battery capacity increases, but electrolyte stability and safety deteriorate
Solution Approach 1:
The patent changes electrolyte parameters by introducing specific ester compounds with controlled carbon numbers and functional groups. The cyclic carbonate esters (4-10 carbons) and chain carboxylate esters create an electrolyte system that supports higher energy density while maintaining stability through their specific molecular structures and ratios.
Solution Approach 2:
The patent uses specific electrolyte compounds as intermediaries between the electrodes and the electrolyte system. The cyclic carbonate esters and chain carboxylate esters act as mediators that enable high energy density operation while protecting the electrolyte from degradation, thus resolving the contradiction between energy storage capacity and electrolyte stability.
3Volume of moving object
If battery size is reduced for portable applications, then device portability improves, but battery capacity and lifespan are compromised
Solution Approach 1:
The patent changes the electrolyte's physical and chemical parameters by using specific cyclic carbonate esters (4-10 carbons) and chain carboxylate esters with optimized ratios. This creates a compact, efficient electrolyte system that delivers high capacity and long lifespan in a reduced volume, suitable for portable electronic devices.
Solution Approach 2:
The patent applies local quality by optimizing the electrolyte composition specifically for compact battery applications. The specific ratio of cyclic carbonate esters (10-50 vol%) and chain carboxylate esters (30-70 vol%) creates localized chemical environments that maximize energy density and cycle life within a smaller battery volume.
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 configuration improves chemical stability of the electrolyte, reduces swelling, and maintains discharge capacity, even under extreme temperatures, thereby achieving superior battery performance and extended lifespan.
Implementation Method 1
the electrolytic solution includes a sulfuric acid compound represented by the following formula (1)... makes it possible to achieve superior battery characteristics
Implementation Method 2
The secondary battery includes a cathode, an anode, and electrolytic solution... utilizes insertion and extraction of an electrode reactant
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A secondary battery includes: a cathode, an anode, and an electrolytic solution including a sulfuric acid compound represented by Xn+[M(Rf)a(CN)b(SO4)c]m-, where Xn+ is an ion such as a metal ion, M is an element such as a transition metal element, Rf is a group such as a fluorine group, a is an integer of 0 to 4, b is an integer of 0 to 5, c is an integer of 1 to 4, m is an integer of 1 to 3, and n is an integer of 1 or 2. The cathode, the anode, and the electrolytic solution are provided inside a film-like outer package member.