Graphite Intercalation Compound Solubilization via Aprotic Polar Solvent
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Solution Overview
Problem
Current methods for solubilizing graphite result in functionalized and denatured graphene planes, limiting their industrial applications due to high manufacturing costs and limited accessibility of high-purity graphene in large quantities.
Innovation Solution
A process involving the reduction of graphite using an alkali metal to form a binary graphite intercalation compound, followed by exposure to an aprotic polar solvent, such as THF, to yield a solution of reduced graphene, which is stable and easily usable for shaping and composite material production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If current methods for solubilizing graphite are used, then graphene can be obtained in solution form, but the graphene planes become functionalized and denatured, limiting industrial applications
Solution Approach 1:
The patent uses an aprotic polar solvent as an intermediary substance to solubilize the graphite intercalation compound. The solvent molecules insert themselves between the graphene planes, acting as a mediator that enables solubilization without forming covalent bonds with the graphene carbon atoms, thus preserving the structural integrity while achieving solution form
Solution Approach 2:
The patent changes the chemical state of graphite by first forming a graphite intercalation compound with alkali metal, then using aprotic polar solvent to solubilize it. This parameter change from pure graphite to intercalation compound enables solubilization without functionalization, resolving the contradiction between manufacturability and structural preservation
2Productivity
If functionalization methods are used to solubilize graphite, then graphene can be obtained in solution, but the manufacturing cost increases and purity is compromised
Solution Approach 1:
The aprotic polar solvent serves as a non-reactive intermediary that enables the graphite intercalation compound to form stable solutions without chemical modification. This approach maintains high purity graphene while enabling scalable production through simple solubilization rather than complex functionalization reactions
3Ease of operation
If conventional solubilization methods are used, then graphene solutions can be produced, but the processes are complex and costly
Solution Approach 1:
The patent performs preliminary action by first forming the graphite intercalation compound with alkali metal, which pre-prepares the graphite structure for easy solubilization. This preliminary intercalation step simplifies the subsequent solubilization process, making it easier to operate and more cost-effective while producing high-quality graphene solutions
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 method allows for the production of high-purity graphene solutions that can be easily used for shaping and composite material production, reducing manufacturing costs and improving accessibility, while maintaining the structural integrity of graphene planes.
Implementation Method 1
the use of an aprotic polar solvent for the solubilization of a graphite intercalation compound
Implementation Method 2
the reduction of graphite using an alkali metal to form a binary graphite intercalation compound
Data Source
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AI summary
Solubilizing process of graphite, comprises: reducing graphite by an alkali metal to obtain a graphite intercalation compound; and exposing the graphite intercalation compound to an aprotic polar solvent to give a reduced graphene solution, where the process is carried out under inert atmosphere. Independent claims are included for: (1) graphene obtained, in the step of evaporation of aprotic polar solvent, by the process; (2) reduced graphene solution obtained by the process; (3) use of graphene for the preparation of composite materials; and (4) use of a reduced graphene solution for deposition of graphene on a substrate.