Layered Compound-Metal Particle Composite for Low-Polarity Affinity

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Solution Overview

Problem

Existing methods for producing layered compound-metal particle composites struggle to achieve affinity with low-polarity substances, limiting their application in film-forming processes and device fabrication, particularly in organic solar cells and electrical double-layer capacitors.

Innovation Solution

A method involving the intercalation of organic ions into organically modified layered compounds, combined with an aqueous colloidal metal solution and a nonaqueous solvent that is a poor solvent for the metal colloid, allows for the formation of a composite with excellent affinity to low-polarity substances, enabling stable dispersion and integration in organic solvents.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional methods using aqueous solutions or highly polar solvents are used to produce layered compound-metal particle composites, then the composites can be obtained with good stability in highly polar substances, but they lack affinity with low-polarity substances, limiting their application in organic solvents and film-forming processes

Engineering Contradiction:

Improvestability of compositeVSAvoidaffinity with low-polarity substances

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the solvent polarity parameter from highly polar (aqueous) to low-polar (organic) by introducing a nonaqueous solvent with specific properties (poor solvent for metal colloid, good solvent for layered compound). This parameter change enables the composite to have affinity with low-polarity substances while maintaining stability, resolving the contradiction between reliability and adaptability

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The nonaqueous solvent acts as an intermediary medium that facilitates the interaction between the layered compound and metal particles. It provides a suitable environment for both components to coexist and form a stable composite with affinity to low-polarity substances, enabling application in organic solvents and film-forming processes

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If layered compound-metal particle composites are dispersed in organic solvents for film-forming processes, then work efficiency and economy are improved, but conventional composites lack affinity with low-polarity substances, making adequate dispersion and integration impossible

Engineering Contradiction:

Improvework efficiencyVSAvoidaffinity with organic solvents

Core Design Contradiction:

ProductivityVSAdaptability or versatility

Solution Approach 1:

The patent changes the solvent polarity parameter to match the organic solvent environment, enabling the composite to have affinity with low-polarity substances. This allows adequate dispersion and integration in organic solvents for film-forming processes, achieving both high productivity and adaptability

Inventive Principle:

Principle #35Parameter changes

3Reliability

If conventional layered compound-metal particle composites are used in organic solar cells, then photoelectric conversion enhancement is desired, but the composites lack affinity with organic substances, preventing metal nanoparticles from approaching bulk heterojunctions

Engineering Contradiction:

Improvephotoelectric conversion enhancementVSAvoidaffinity with organic semiconductor

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent changes the polarity parameter of the composite to match the organic semiconductor environment. By using a nonaqueous solvent with low polarity, the composite gains affinity with organic semiconductors, enabling metal nanoparticles to approach bulk heterojunctions and achieve photoelectric conversion enhancement

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

This approach enables the production of layered compound-metal particle composites that can be efficiently incorporated into devices using film-forming methods, enhancing work efficiency and economy, and facilitates improved photoelectric conversion and capacitive performance.

Implementation Method 1

the intercalation of organic ions between layers of the layered compound

Methodology Applied

Scientific EffectIntercalation:

Implementation Method 2

adding to the organically modified layered compound an aqueous colloidal metal solution and a nonaqueous solvent which is a poor solvent for the metal colloid

Methodology Applied

Scientific EffectSolvent effect:

Implementation Method 3

a composite obtained by causing precious metal nanoparticles to aggregate within a fluid matrix such as smectite and stabilizing the aggregated state

Methodology Applied

Scientific EffectAggregation: Coagulation

Data Source

PatentEP2676931B1Layered compound-metal particle composite and production method therefor, and suspension, film and flexible solar cell using same

Publication Date: 2019.09.18 KYUSHU UNIV

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AI summary

A layered compound-metal particle composite 3 is obtained by the addition, to an organically modified layered compound 1 formed by the intercalation of organic ions between layers of a layered compound, of both an aqueous colloidal metal solution 2 in which metal particles are dispersed as a metal colloid in water, and a nonaqueous solvent which is a poor solvent for the metal colloid and has an excellent ability to swell the organically modified layered compound 1.