Lithium Metal Battery Electrolyte Using Orthocarbonic Acid Ester

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Solution Overview

Problem

Existing secondary batteries do not achieve sufficient battery characteristics, particularly in terms of suppressing decomposition reactions at the negative electrode surface during charging and discharging.

Innovation Solution

Incorporating an orthocarbonic acid ester compound as the solvent in the electrolytic solution, with a content greater than or equal to 40 wt%, to stabilize the electrolyte and protect the negative electrode surface from decomposition reactions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional electrolytic solutions are used, then the battery can operate, but decomposition reactions occur at the negative electrode surface during charging and discharging

Engineering Contradiction:

Improvebattery characteristicVSAvoiddecomposition reaction at negative electrode

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The patent changes the chemical composition parameters of the electrolytic solution by incorporating orthocarbonic acid ester compounds with specific molecular structures (Formula 1) and controlling their content at ≥40 wt%, which fundamentally alters the electrochemical stability and suppresses decomposition reactions at the lithium metal negative electrode surface

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite electrolytic solution system by combining orthocarbonic acid ester compounds with other solvents and additives in specific ratios, where the orthocarbonic acid ester compound acts as a protective component that forms stable surface films on the negative electrode, preventing harmful decomposition reactions

Inventive Principle:

Principle #40Composite materials

2Reliability

If the content of orthocarbonic acid ester compound is increased to suppress decomposition, then battery stability improves, but the cost and complexity of formulation increases

Engineering Contradiction:

Improvebattery stabilityVSAvoidelectrolyte formulation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent establishes a specific parameter range for orthocarbonic acid ester compound content (≥40 wt%) that optimizes both stability and formulation simplicity, avoiding the need for complex multi-component systems while achieving reliable suppression of decomposition reactions

Inventive Principle:

Principle #35Parameter changes

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 orthocarbonic acid ester compound effectively suppresses electrolytic solution decomposition at the negative electrode, enhancing battery performance and stability.

Implementation Method 1

the solvent includes an orthocarbonic acid ester compound represented by Formula (1)... This makes it possible to achieve a superior battery characteristic

Methodology Applied

Scientific EffectDecomposition suppression:

Data Source

PatentUS20260018674A1Secondary battery

Publication Date: 2026.01.15 MURATA MFG CO LTD

AI summary

Provided is a secondary battery that makes it possible to achieve a superior battery characteristic. The secondary battery includes a positive electrode, a negative electrode, and an electrolytic solution. The negative electrode includes lithium metal. The electrolytic solution includes a solvent. The solvent includes an orthocarbonic acid ester compound represented by Formula (1). A content of the orthocarbonic acid ester compound in the solvent is greater than or equal to 40 wt %.