Cyclic Electrolyte Additive for High-Temperature Battery Output

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Solution Overview

Problem

Existing lithium secondary batteries face challenges with reduced output and increased resistance at high and low temperatures, require faster charging, and have poor capacity retention in varying environments, necessitating improved electrolytes for enhanced performance.

Innovation Solution

Incorporation of a specific electrolyte additive, represented by Chemical Formula 1, which includes compounds with symmetrical cyclic structures to stabilize electron flow, reduce charging resistance, and form stable films on electrodes, thereby improving battery performance.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional electrolytes are used in lithium secondary batteries, then the batteries can operate, but the output and capacity are significantly reduced at high and low temperatures

Engineering Contradiction:

Improvebattery outputVSAvoidcapacity retention in varying environments

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent introduces a novel cyclic carboxylate compound with specific molecular structure parameters (cyclic structure, carboxylate group, specific carbon chain length) to change the chemical parameters of the electrolyte system. This structural parameter change enables the electrolyte to maintain stable performance across varying temperatures, resolving the contradiction between power output and reliability in different environmental conditions

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite electrolyte system by combining the novel cyclic carboxylate compound with existing electrolyte components. This composite approach leverages the unique properties of the cyclic carboxylate structure to improve both power output and capacity retention simultaneously, addressing the environmental adaptability issue

Inventive Principle:

Principle #40Composite materials

2Productivity

If batteries are designed for high output, then charging speed improves, but charging resistance increases at extreme temperatures

Engineering Contradiction:

Improvecharging speedVSAvoidcharging resistance at extreme temperatures

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The cyclic carboxylate compound acts as an intermediary substance in the electrolyte system, mediating between the electrodes and the electrolyte. Its cyclic structure and carboxylate group enable it to reduce charging resistance at extreme temperatures while maintaining high charging speed, effectively resolving the contradiction between productivity and temperature-related resistance

Inventive Principle:

Principle #24Intermediary (Mediator)

3Power

If batteries are used in high temperature environments, then immediate power output is maintained, but capacity retention and lifespan deteriorate rapidly

Engineering Contradiction:

Improvepower output at high temperatureVSAvoidlifespan retention at high temperature

Core Design Contradiction:

PowerVSDuration of action of stationary object

Solution Approach 1:

The cyclic carboxylate compound provides beforehand cushioning by forming a stable protective interface in the electrolyte system before high temperature degradation occurs. The cyclic structure and carboxylate group work together to prevent thermal degradation, allowing the battery to maintain both power output and lifespan retention in high temperature environments

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 electrolyte additive enhances charging efficiency, output, and lifespan retention at high temperatures, with reduced resistance and improved capacity retention, making it suitable for vehicle batteries.

Implementation Method 1

since electricity is generated or consumed by oxidation-reduction reaction dependent on insertion and desorption at a cathode and an anode

Methodology Applied

Scientific EffectElectrochemical reaction: Electrolysis

Implementation Method 2

an electrolyte between a cathode and an anode enables smooth movement of lithium ions

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Data Source

PatentUS20260024813A1Electrolyte additive, battery electrolyte including electrolyte additive, and secondary battery including battery electrolyte

Publication Date: 2026.01.22 SOULBRAIN CO LTD

AI summary

The present invention relates to an electrolyte additive, a battery electrolyte including the electrolyte additive, and a secondary battery, and more particularly, to an electrolyte additive including a compound represented by Chemical Formula 1, an electrolyte including the electrolyte additive, and a secondary battery including the electrolyte. According to the present invention, due to low charging resistance, charging efficiency and output may be improved. In addition, the present invention has an effect of providing a secondary battery having a long lifespan and excellent capacity retention at high temperature.