Formula 1 Electrolyte Additive for High-Temperature Capacity Retention

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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 times, and have poor capacity retention in varying environments, necessitating improved electrolyte additives for enhanced performance.

Innovation Solution

An electrolyte additive with a specific compound structure, represented by Chemical Formula 1, is added to the battery electrolyte, reducing charging resistance, improving output, and enhancing capacity retention at high temperatures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Power

If conventional electrolyte is used, then battery can operate, but charging resistance increases at high temperatures and output decreases

Engineering Contradiction:

Improvebattery outputVSAvoidcharging resistance

Core Design Contradiction:

PowerVSReliability

Solution Approach 1:

The patent introduces a novel electrolyte additive with specific molecular structure (Formula 1) containing phosphorus, sulfur, or arsenic atoms with specific bonding configurations. This chemical parameter change modifies the electrolyte's interaction with electrode surfaces, forming stable interface films that reduce charging resistance and improve power output, especially at high temperatures where conventional electrolytes fail.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite electrolyte system by combining the new additive (Formula 1) with conventional electrolyte components. This composite approach leverages the unique properties of the phosphorus/sulfur/arsenic-containing compound while maintaining the base electrolyte's functionality, achieving synergistic effects that reduce resistance and improve power delivery.

Inventive Principle:

Principle #40Composite materials

2Productivity

If battery is designed for high output, then charging speed improves, but capacity retention deteriorates at high temperatures

Engineering Contradiction:

Improvecharging speedVSAvoidcapacity retention

Core Design Contradiction:

ProductivityVSStability of the object's composition

Solution Approach 1:

The electrolyte additive in Formula 1 performs preliminary action by forming stable protective films on electrode surfaces before high-temperature operation begins. This pre-formed interface layer prevents degradation reactions during fast charging at high temperatures, preserving capacity retention while enabling high charging speeds.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent employs the additive as a cushioning agent that absorbs thermal stress and chemical degradation at the electrode-electrolyte interface before they can damage the battery's capacity. This beforehand protection mechanism allows the battery to withstand high-temperature fast charging without capacity loss.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

3Power

If battery operates at high temperature, then power delivery improves, but lifespan decreases due to poor capacity retention

Engineering Contradiction:

Improvepower deliveryVSAvoidlifespan

Core Design Contradiction:

PowerVSDuration of action of stationary object

Solution Approach 1:

The electrolyte additive acts as a sacrificial component that consumes itself to form stable protective layers, allowing the main battery components to last longer. The additive decomposes preferentially to create stable interface films, sacrificing its own stability to protect the electrode structures from thermal degradation during high-temperature operation.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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 improves charging efficiency, reduces resistance, and extends the battery's lifespan and capacity retention, particularly at high temperatures, making it suitable for vehicle batteries.

Implementation Method 1

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

Methodology Applied

Scientific EffectIonic conduction: Conduction (electrical)

Implementation Method 2

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: Redox Reactions

Data Source

PatentUS12469879B2Electrolyte additive, battery electrolyte including electrolyte additive, and secondary battery including battery electrolyte

Publication Date: 2025.11.11 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.