Graphene Oxide Heterostructure Wet Generator for Stable Power Output
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Solution Overview
Problem
Existing wet power generation technologies using two-dimensional graphene materials suffer from low power density, require directional water movement, and produce unstable pulse-type voltage signals, limiting their scalability and continuous power output.
Innovation Solution
A heterogeneous graphene oxide wet generator is developed, comprising a heterostructure of graphene oxide and reduced graphene oxide, prepared through chemical oxidation and reduction methods, with a specific fabrication process involving coating, reduction, cutting, and encapsulation to enhance water molecule interaction and generate a stable open circuit voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If two-dimensional graphene materials are used for wet power generation, then the device can be flexible and environmentally friendly, but the power density is too low
Solution Approach 1:
The patent uses composite materials by combining graphene oxide (GO) with reduced graphene oxide (rGO) to form a heterostructure. This composite approach leverages the advantages of both materials: GO provides high flexibility and large surface area, while rGO contributes to higher electrical conductivity and power density, thus resolving the contradiction between flexibility and power density.
Solution Approach 2:
The patent applies local quality by creating a heterostructure where different regions have different properties. The GO region provides flexibility and surface area for water interaction, while the rGO region provides high conductivity for efficient charge transport. This spatial differentiation of material properties allows the device to simultaneously achieve flexibility and high power density.
2Power
If functionalized two-dimensional materials are used, then the device can generate power from water movement, but the output is pulse-type voltage signal that cannot continuously improve high-power electricity
Solution Approach 1:
The patent achieves continuous power generation by designing a heterostructure that enables continuous charge separation and transport. The GO region continuously interacts with water molecules to generate charges, while the rGO region continuously transports these charges, converting pulse-type voltage into stable, continuous high-power electricity output.
Solution Approach 2:
The patent uses the heterostructure interface between GO and rGO as an intermediary mechanism. This interface facilitates efficient charge separation and transfer, acting as a mediator that converts the pulse-type voltage from water interaction into stable continuous electricity, thereby improving voltage signal stability.
3Power
If large gradient of humidity environment is required, then wet power generation can be achieved, but the device cannot be packaged or prepared on a large scale
Solution Approach 1:
The patent changes the material parameters by using chemically oxidized and reduced graphene oxide with controlled oxidation degrees. This parameter optimization allows the device to generate power under milder humidity conditions, reducing the requirement for large humidity gradients and enabling easier packaging and large-scale preparation.
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 generator achieves a power density of 879.2 μW/cm³, stable operation for over 24 hours, flexibility for bending, and scalable production, capable of generating a high open circuit voltage of 0.96 V and up to 15 V with series connection, suitable for flexible devices and large-scale manufacturing.
Implementation Method 1
the interaction between two-dimensional materials represented by graphene and water molecules can produce the phenomenon of charge transfer transmission due to the quantum confinement effect
Implementation Method 2
the environmentally sensitive surface effect caused by large specific surface area
Implementation Method 3
The graphene oxide is prepared by a chemical oxidation method using graphite as a raw material
Implementation Method 4
the reduced graphene oxide is prepared by thermal reduction, chemical reduction, or laser reduction using graphene oxide as raw material
Data Source
AI summary
A heterogeneous graphene oxide wet generator and a preparation method are provided. A heterogeneous graphene oxide wet generator includes an integrated forming heterostructure composed of the first part and the second part arranged in the left-right position or the up-down position, the material of the first part is graphene oxide, and the material of the second part is reduced graphene oxide. The heterogeneous graphene oxide wet generator provided by the invention has high open circuit voltage, excellent cycle stability, and has the potential to be applied to flexible batteries, after a series-parallel connection, a generator set with a high voltage can be obtained, and a reduction device can be installed on the industrial coating line for preparing graphene oxide, which is expected to be mass-produced.