Graphene-Graphite Composite Sheet for Irregular Heat Sources

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Solution Overview

Problem

Conventional heat-dissipating devices are inflexible and unable to effectively attach to irregularly shaped heat sources, leading to reduced heat dissipation performance and potential damage from high operating temperatures in electronic devices.

Innovation Solution

A graphene sheet combining graphite flake structure is developed, comprising a mixture of graphite nanoplatelet and graphene materials, which is manufactured using a slurry method involving a solvent, graphite nanoplatelet material, and graphene material, allowing for flexible attachment and enhanced heat conductivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a conventional rigid heat-dissipating device is used, then the structure is simple and easy to manufacture, but it cannot fit irregularly shaped heat sources and reduces heat dissipation performance

Engineering Contradiction:

Improveadaptability to irregular heat source shapesVSAvoidstructure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent uses a graphene sheet with flexible properties that can conform to irregular surfaces of heat sources. The graphene material forms a thin, adaptable layer that maintains contact with complex geometries, enabling effective heat dissipation from irregularly shaped electronic components while keeping the overall structure relatively simple.

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The invention employs composite material structure combining graphene sheets with traditional heat-dissipating components. This composite approach provides both the flexibility needed to adapt to irregular shapes and the thermal conductivity required for effective heat dissipation, resolving the contradiction between adaptability and structural simplicity.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If the heat-dissipating device is made flexible to fit irregular shapes, then adaptability improves, but heat conducting effect may deteriorate

Engineering Contradiction:

ImproveflexibilityVSAvoidheat conducting effect

Core Design Contradiction:

Adaptability or versatilityVSTemperature

Solution Approach 1:

The patent utilizes graphene's unique properties as a composite material that simultaneously provides exceptional flexibility and superior thermal conductivity. The graphene sheet can be conformally attached to irregular surfaces while maintaining excellent heat conduction pathways, thus achieving both adaptability and effective heat dissipation without compromise.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The invention changes the material parameters by using graphene with specific thickness and structural properties. The graphene sheet's atomic-layer thickness and crystalline structure enable it to be highly flexible yet maintain outstanding thermal conductivity, resolving the apparent contradiction between flexibility and heat conduction capability.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If graphene material is added to enhance heat conductivity and flexibility, then heat dissipation performance improves, but manufacturing complexity increases

Engineering Contradiction:

Improveheat dissipation performanceVSAvoidmanufacturing process simplicity

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent extracts and utilizes the key beneficial properties of graphene (flexibility and thermal conductivity) in a practical heat-dissipating device configuration. By focusing on the essential functions rather than attempting to incorporate all potential graphene applications, the manufacturing process remains relatively simple while achieving superior heat dissipation performance and flexibility.

Inventive Principle:

Principle #2Taking out (Extraction)

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 graphene sheet provides superior heat dissipation, flexibility, and electromagnetic shielding, enabling effective heat management and attachment to diverse electronic device shapes while maintaining structural integrity.

Implementation Method 1

it will have high heat and electric conductivities

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

it will have high heat and electric conductivities, excellent flexibility, and stronger structure

Methodology Applied

Scientific EffectElectrical conduction: Conduction (electrical)

Data Source

PatentUS10066141B2Graphene sheet combining graphite flake structure and its manufacturing method, and slurry for manufacturing the same

Publication Date: 2018.09.04 GRAPHENIC INT HLDG LTD

AI summary

A graphene sheet combining graphite flake structure includes a graphite nanoplatelet material and a graphene material. The graphene material is mixed in the graphite nanoplatelet material, and the content of the graphene material is between 1% and 80% of the graphite nanoplatelet material. A slurry for manufacturing the graphene sheet combining graphite flake structure and a manufacturing method for the graphene sheet combining graphite flake structure are also disclosed.