Nonaqueous Electrolyte Additive for Low-Resistance Battery Storage

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Solution Overview

Problem

There is a demand for reducing initial discharge resistance and inhibiting gas generation during storage in energy devices such as lithium batteries, particularly for applications in electric vehicles and portable devices.

Innovation Solution

Incorporating an organic group with 1 to 10 carbon atoms, composed of carbon, hydrogen, oxygen, sulfur, or phosphorus atoms, into a substituent of an unsaturated hydrocarbon group-containing silane compound in a nonaqueous electrolyte solution, specifically using a compound represented by Formula (1), which enhances chelating coordination to the positive electrode and reduces nucleophilic reactions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional electrolyte solutions are used, then the energy device can operate, but the initial discharge resistance is high and gas generation occurs during storage

Engineering Contradiction:

Improveinitial discharge resistanceVSAvoidgas generation during storage

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent modifies the chemical structure of the silane compound by introducing specific organic groups (Y) with 1-10 carbon atoms containing O, S, or P atoms. This structural parameter change transforms the compound's properties to reduce both initial discharge resistance and gas generation during storage, resolving the contradiction between operational performance and storage stability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent uses a composite electrolyte solution containing the modified silane compound (Formula 1) combined with specific non-aqueous solvents and electrolyte salts. This composite formulation synergistically reduces initial discharge resistance while inhibiting gas generation during storage, addressing both harmful effects simultaneously.

Inventive Principle:

Principle #40Composite materials

2Productivity

If the ratio of voids inside batteries is reduced to increase capacity, then energy density improves, but initial discharge resistance increases

Engineering Contradiction:

Improveenergy densityVSAvoidinitial discharge resistance

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent changes the chemical parameters of the electrolyte by incorporating the modified silane compound with specific organic groups. This parameter modification reduces initial discharge resistance even in batteries with reduced void ratios, allowing high energy density to be maintained without sacrificing discharge performance.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If high temperature storage is endured, then the battery can operate in various conditions, but gas generation increases and storage durability decreases

Engineering Contradiction:

Improvehigh temperature operation capabilityVSAvoidstorage durability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent modifies the thermal stability parameters of the electrolyte by introducing heat-resistant organic groups (containing O, S, or P atoms) into the silane compound structure. This parameter change enables the battery to maintain storage durability even under high temperature conditions, resolving the contradiction between environmental adaptability and storage reliability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The modified silane compound proactively prevents gas generation during high temperature storage by forming stable protective films on electrode surfaces before degradation can occur. This preliminary protective action maintains storage durability while preserving high temperature operation capability.

Inventive Principle:

Principle #9Preliminary anti-action

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 energy devices with reduced initial discharge resistance and inhibited gas generation during storage, improving high-temperature storage durability.

Implementation Method 1

enhances chelating coordination to the positive electrode

Methodology Applied

Scientific EffectChelating coordination: Chemical Bonding

Implementation Method 2

reduces nucleophilic reactions

Methodology Applied

Scientific EffectNucleophilic reaction inhibition: Chemical Bonding

Data Source

PatentUS12469878B2Nonaqueous electrolyte solution and energy device

Publication Date: 2025.11.11 MITSUBISHI CHEM CORP

AI summary

Provided is a nonaqueous electrolyte solution which can provide an energy device in which the initial discharge resistance is reduced and the gas generation during storage is inhibited. This nonaqueous electrolyte solution for an energy device including a positive electrode and a negative electrode is characterized by containing a compound represented by the following Formula (1) together with an electrolyte and a nonaqueous solvent:(wherein, X represents an optionally substituted unsaturated hydrocarbon group and at least one unsaturated carbon-carbon bond; Y represents an organic group, which is constituted by atoms selected from the group consisting of a carbon atom, a hydrogen atom, an oxygen atom, a sulfur atom, and a phosphorus atom; R1 represents a hydrogen atom, a halogen atom, or an unsubstituted or halogen atom-substituted hydrocarbon group; R2 represents an unsubstituted or halogen atom-substituted hydrocarbon group; and n represents an integer of 1 to 3).