Composite Carbon Material for Heat Dissipation and Battery Anodes
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Solution Overview
Problem
Existing graphite-based composite materials face challenges in achieving uniform dispersion of graphite at a nanometer level and are limited to specific applications, with their preparation methods resulting in inconsistent mechanical and electrochemical performance.
Innovation Solution
A composite carbon material is developed by controlling the ratio of graphite crystal phase to amorphous carbon phase intensity, achieved through multi-stage mixing and carbonization processes, which ensures uniform dispersion and enhanced mechanical and electrochemical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional preparation methods are used for graphite-based composite materials, then the materials can be produced with basic properties, but uniform dispersion of graphite at nanometer level cannot be achieved and mechanical performance is inconsistent
Solution Approach 1:
The preparation process is divided into multiple sequential stages: initial mixing, carbonization, graphitization, and post-treatment. Each stage transforms the material structure progressively, enabling controlled dispersion and crystallization that achieves nanometer-level uniformity without requiring overly complex equipment
Solution Approach 2:
The patent systematically varies critical parameters including heating rate (5-20°C/min), graphitization temperature (2500-3000°C), and processing time to optimize the dispersion and crystallization processes. These parameter adjustments enable precise control over the final material structure and performance
2Adaptability or versatility
If graphite-based composite materials are prepared for specific applications, then they can meet those particular requirements, but their adaptability to different fields is limited
Solution Approach 1:
The patent develops a universal preparation methodology that produces graphite-based composite materials with consistent high-performance characteristics suitable for multiple applications including heat dissipation, lithium ion batteries, and mechanical components. The process parameters can be adjusted to optimize for different applications while maintaining core performance standards
Solution Approach 2:
The invention creates composite structures combining graphite crystalline phases with amorphous carbon matrices, where the synergistic interaction between different phases provides both mechanical strength and thermal/electrical conductivity. This composite approach enables the material to satisfy multiple performance requirements simultaneously
3Strength
If multi-stage mixing and carbonization processes are implemented, then uniform dispersion and enhanced properties are achieved, but the preparation time and process complexity increase
Solution Approach 1:
The patent performs preliminary mixing and pre-carbonization treatments before the final graphitization stage. These preliminary actions prepare the material structure in advance, reducing the time required for the high-temperature graphitization process and enabling faster overall production while maintaining high mechanical strength
Solution Approach 2:
The preparation process is designed as a continuous sequence of operations where each stage builds upon the previous one without interruption. The multi-stage process flows continuously from mixing through carbonization to graphitization, minimizing idle time and maximizing production efficiency while ensuring uniform dispersion and enhanced properties
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 resulting composite carbon material exhibits improved mechanical strength, thermal conductivity, and electrochemical performance, making it suitable for both heat dissipation and lithium ion battery applications with higher capacity retention.
Implementation Method 1
subjecting the green body to carbonization and purification so as to prepare the graphite material
Implementation Method 2
the ratio I002/Iamor of the peak intensity I002 of the graphite crystal phase (002) plane relative to the peak intensity Iamor of the amorphous carbon phase as measured by the X-Ray Diffraction (XRD)
Implementation Method 3
the graphite-based composite materials have a lower density, a higher thermal conductivity, and a lower thermal expansion coefficient than the metal materials, thus can be used as the heat dissipation materials
Implementation Method 4
the graphite-based composite materials have the characteristics of high electronic conductivity, large lithium ion diffusion coefficient, small volumetric change of a laminated structure before and after the lithium intercalation
Data Source
AI summary
A composite carbon material and a preparation method and a use thereof. The composite carbon material comprises a graphite crystal phase and an amorphous carbon phase, wherein the ratio I002/Iamor of the peak intensity I002 of the graphite crystal phase (002) plane relative to the peak intensity Iamor of the amorphous carbon phase as measured by the X-Ray Diffraction (XRD) is within a range of 0.1-40, and the content of the graphite crystal phase is not less than 5 wt %. The composite carbon material has high compressive strength, bending strength and thermal conductivity, and can be used as a heat dissipation material; the composite carbon material can also be used as an anode material of a lithium ion battery such that the lithium ion battery exhibits excellent electrochemical performance.