Hydrogen Sensor Using Palladium-Graphene Thin Film
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Solution Overview
Problem
Current hydrogen sensors are costly and have complex structures, making them unsuitable for widespread use in hydrogen fuel applications due to their large size and high production costs.
Innovation Solution
A hydrogen sensor utilizing a thin film palladium core with applied graphene, which changes resistance in response to hydrogen presence, combined with a variable resistor and electrodes, allowing for miniaturization and low-cost manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hydrogen sensors (catalyzed combustion, heating wire, semiconductor) are used, then hydrogen sensing capability is achieved, but the sensor size becomes large and structure becomes complex
Solution Approach 1:
The patent employs thin film structures for both the palladium layer (5-50 nm) and graphene layer (1-10 nm) to create a compact sensor core. This thin film approach reduces the sensor size and simplifies the overall structure while maintaining hydrogen sensing capability, directly resolving the contradiction between sensing reliability and structural complexity
Solution Approach 2:
The patent creates a composite material structure by combining palladium and graphene in a layered configuration. The palladium provides hydrogen absorption and catalytic properties, while graphene contributes electrical conductivity and structural stability. This composite approach enables simplified sensor design with reduced complexity while maintaining reliable hydrogen detection
2Reliability
If conventional hydrogen sensors are used, then hydrogen sensing capability is achieved, but the manufacturing cost becomes high
Solution Approach 1:
The patent changes the material parameters by using ultra-thin film dimensions (palladium: 5-50 nm, graphene: 1-10 nm) and optimizing the layer thickness ratio (graphene thickness is N times palladium thickness, where N is a natural number). These parameter optimizations reduce material consumption and manufacturing costs while maintaining sensing performance
Solution Approach 2:
The patent employs graphene, which can be produced through cost-effective methods such as chemical vapor deposition (CVD) or exfoliation techniques, replacing expensive conventional sensor materials. The thin film nature of both palladium and graphene reduces material costs, making the sensor more economically viable for mass production
3Reliability
If conventional hydrogen sensors are used, then hydrogen sensing capability is achieved, but the sensor size becomes large
Solution Approach 1:
The patent uses thin film structures with specific thickness ranges (palladium: 5-50 nm, graphene: 1-10 nm) to minimize the sensor core volume. The thin film configuration allows the sensor to be miniaturized while maintaining sufficient hydrogen absorption and electrical property changes for reliable detection
Solution Approach 2:
The patent transitions from bulk material structures to two-dimensional thin film structures, effectively reducing the volume occupied by the sensor core. The layered configuration of palladium and graphene films enables compact integration into small-scale devices while preserving hydrogen sensing functionality
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 sensor effectively senses hydrogen at a lower cost and in a compact form, enhancing safety and usability in hydrogen fuel applications by providing accurate and stable detection.
Implementation Method 1
a core which reacts with hydrogen to change in resistance value; the core comprising: palladium having a thin film shape
Implementation Method 2
the core comprising: palladium having a thin film shape; and graphene applied on the palladium
Implementation Method 3
graphene applied on the palladium and having a thin film shape; the core reacts with hydrogen to change in resistance value
Data Source
AI summary
The present invention relates to a sensor for sensing hydrogen. The sensor of the present invention comprises: a core which reacts with hydrogen to change a resistance value; at least two electrodes connected to the core; and a variable resistor which is connected to at least one of the two electrodes and of which the resistance value changes in response to a control signal, wherein the core includes palladium having a thin film shape, and graphene which is applied on the palladium and has a thin film shape.