Oxyhalide Solid Electrolyte Composition for Conductive Solvent Processing

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Solution Overview

Problem

Conventional solid electrolyte materials experience a decrease in ionic conductivity when mixed with certain organic solvents, and there is a need for a solid electrolyte composition that maintains high ionic conductivity and stability for use in all-solid-state batteries.

Innovation Solution

A solid electrolyte composition comprising an oxyhalide solid electrolyte material with specific elements and an organic solvent, such as halogen-group-containing compounds and hydrocarbons, which are selected to maintain stability and suppress a decrease in ionic conductivity, allowing for the formation of a dense and homogeneous solid electrolyte member.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If conventional solid electrolyte materials are mixed with organic solvents, then the materials can be processed into desired shapes, but the ionic conductivity decreases

Engineering Contradiction:

ImproveprocessabilityVSAvoidionic conductivity

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent changes the chemical composition parameters of the organic solvent by specifying it must contain a nitrogen atom and have a dipole moment of 3.0 Debye or more. This parameter change allows the solvent to maintain ionic conductivity while enabling processability through proper solvation of the solid electrolyte material.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The organic solvent acts as an intermediary substance that facilitates processing without permanently damaging the solid electrolyte material. The specific solvent requirements ensure it can dissolve or disperse the material appropriately while maintaining ionic conductivity, and can be removed or degraded without harming the final product's performance.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of manufacture

If the organic solvent is removed from the composition, then the solid electrolyte member can be formed, but the suspension stability decreases

Engineering Contradiction:

Improvemember formationVSAvoidsuspension stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent applies preliminary action by carefully selecting the organic solvent with specific properties (nitrogen-containing, dipole moment ≥3.0 Debye) before the member formation process. This preliminary selection ensures the solvent provides adequate suspension stability during processing and can be effectively removed afterward without compromising the final product's integrity or performance.

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS12456752B2Solid electrolyte composition, and method for manufacturing solid electrolyte member

Publication Date: 2025.10.28 PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

AI summary

A solid electrolyte composition of the present disclosure includes: a solid electrolyte material including an oxygen element and a halogen element; and an organic solvent. The organic solvent includes at least one selected from the group consisting of a halogen-group-containing compound and a hydrocarbon. The solid electrolyte material includes at least one selected from the group consisting of Zn, Sn, Al, Sc, Ga, Bi, Sb, Zr, Hf, Ti, Ta, Nb, W, Y, Gd, Tb, and Sm.