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Graphene-based highly sensitive hydrogen sensor and preparation method thereof

A graphene-based, sensor-based technology that is applied in the field of sensors and can solve problems such as insufficient sensitivity, sensor effectiveness, or insufficient detection accuracy

Active Publication Date: 2021-06-25
荷氢新能源科技(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current graphene-based sensors usually have shortcomings such as insufficient sensitivity, corresponding effectiveness of the sensor, or insufficient detection accuracy.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A graphene-based highly sensitive hydrogen sensor, comprising an upper electrode, a lower electrode, and an intermediate composite structure between the upper electrode and the lower electrode, characterized in that the intermediate composite structure is a three-layer composite cylindrical structure, and the three-layer composite The inner layer of the cylindrical structure is WO 3 The middle layer is a nickel foam matrix layer, the outer layer is a graphene network structure layer, and the upper end of the three-layer composite cylindrical structure is sealed and connected with the upper electrode, and the lower end of the three-layer composite cylindrical structure is sealed and connected with the lower electrode.

[0025] The diameter of the three-layer composite cylindrical structure is 2mm, and the height is 8mm.

[0026] In the three-layer composite tubular structure, WO 3 The thickness of the layer is 150nm; the thickness of the graphene network structure layer...

Embodiment 2

[0034] A graphene-based highly sensitive hydrogen sensor, comprising an upper electrode, a lower electrode, and an intermediate composite structure between the upper electrode and the lower electrode, characterized in that the intermediate composite structure is a three-layer composite cylindrical structure, and the three-layer composite The inner layer of the cylindrical structure is WO 3 The middle layer is a nickel foam matrix layer, the outer layer is a graphene network structure layer, and the upper end of the three-layer composite cylindrical structure is sealed and connected with the upper electrode, and the lower end of the three-layer composite cylindrical structure is sealed and connected with the lower electrode.

[0035]Further, between the upper electrode and the lower electrode, a plurality of intermediate composite structures arranged side by side may be included, connected in parallel with the upper electrode and the lower electrode, and the plurality of interme...

Embodiment 3

[0045] A graphene-based highly sensitive hydrogen sensor, comprising an upper electrode, a lower electrode, and an intermediate composite structure between the upper electrode and the lower electrode, characterized in that the intermediate composite structure is a three-layer composite cylindrical structure, and the three-layer composite The inner layer of the cylindrical structure is WO 3 The middle layer is a nickel foam matrix layer, the outer layer is a graphene network structure layer, and the upper end of the three-layer composite cylindrical structure is sealed and connected with the upper electrode, and the lower end of the three-layer composite cylindrical structure is sealed and connected with the lower electrode.

[0046] Further, between the upper electrode and the lower electrode, a plurality of intermediate compound structures arranged side by side may be included, connected in parallel with the upper electrode and the lower electrode, and the plurality of interme...

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Abstract

The invention relates to a graphene-based high-sensitivity hydrogen sensor, comprising an upper electrode, a lower electrode and an intermediate composite structure between the upper electrode and the lower electrode, characterized in that the intermediate composite structure is a three-layer composite cylindrical structure, The inner layer of the three-layer composite cylindrical structure is WO 3 The middle layer is a nickel foam matrix layer, the outer layer is a graphene network structure layer, and the upper end of the three-layer composite cylindrical structure is sealed and connected with the upper electrode, and the lower end of the three-layer composite cylindrical structure is sealed and connected with the lower electrode. In the three-layer composite cylindrical structure, the graphene network structure layer is used as the outlet, which can not only significantly increase the contact area between the sensor and the gas to be detected, improve the response sensitivity of the sensor to hydrogen, but also eliminate some impurity gases for the sensor. The drying of the sensor improves the accuracy of the sensor for hydrogen detection.

Description

technical field [0001] The invention belongs to the field of sensors, in particular to a graphene-based highly sensitive hydrogen sensor and a preparation method thereof. Background technique [0002] Hydrogen is an important reducing gas, which is widely used in chemical, petrochemical, medical and other fields. At the same time, hydrogen is also an important clean energy. Hydrogen combustion can release high energy and is widely used in various fields such as fuel cells and energy. However, hydrogen will have certain safety hazards in practical applications. When the hydrogen content in the air in a local area is greater than 4%, it is very easy to explode. Moreover, because the hydrogen molecule is very small, it is easy to leak during actual production and transportation. In addition, hydrogen molecules are colorless and odorless, so they are difficult to be detected, and their safety hazards are higher than other gases. It is of great significance to develop a hydrog...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/12
CPCG01N27/125
Inventor 张瑞秀
Owner 荷氢新能源科技(山东)有限公司