Triboelectric energy harvesting device and method for manufacturing same

Patent metadata

Field	Value
Publication number	US-10601344-B2
Application number	US-201415125567-A
Country	US
Kind code	B2
Filing date	Mar 11, 2014
Priority date	Mar 11, 2014
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

The present invention relates to a triboelectric energy harvesting device and a method for manufacturing the same. The triboelectric energy harvesting device according to an embodiment of the present invention includes a first frictional layer provided with a first surface having first electron affinity, and a second frictional layer facing the first surface and having second electron affinity, wherein at least one of the first and second frictional layers is formed of an elastic material and is provided in an elastic structure.

First claim

The invention claimed is:

1. A triboelectric energy harvesting device comprising:
a first frictional layer provided with a first surface having first electron affinity; and
a second frictional layer provided with a second surface facing the first surface and having second electron affinity,
wherein at least one of the first and second frictional layers is formed of an elastic material and is provided in an elastic structure,
wherein the first frictional layer comprises a spacer formed on thy: first surface to form a space part between the first and the second frictional layers such that the second surface is spaced apart from the first surface, and an end of the spacer being brought into contact with the second surface,
wherein the spacer has elasticity, the spacer being formed of the same material as the first surface of the first frictional layer, and
wherein the spacer is formed in a lattice structure on the first surface.

2. The triboelectric energy harvesting device of claim 1 , wherein at least one of the first and second frictional layers is formed of only an elastic material comprising at least one selected from polydimethylsiloxane, polyurethane, and nylon.

3. The triboelectric energy harvesting device of claim 1 , wherein the elastic structure comprises at least one of a hollow structure and a thin film structure having a thickness of about 0.01 μm to about 200 μm.

4. The triboelectric energy harvesting device of claim 3 , wherein the hollow structure comprises at least one of a mesh structure and a fabric structure.

5. The triboelectric energy harvesting device of claim 1 , wherein both the first and second frictional layers are formed of only an elastic material and are provided in elastic structures.

6. The triboelectric energy harvesting device of claim 1 , further comprising:
a first electrode layer laminated on the first frictional layer or formed inside the first frictional layer; and
a second electrode layer laminated on the second frictional layer or formed inside the second frictional layer.

7. The triboelectric energy harvesting device of claim 1 , wherein at least one of the first and second frictional layers is formed of a conductive material so as to have a function as an electrode layer.

8. The triboelectric energy harvesting device of claim 1 , wherein at least one first frictional layer provided with a first electrode layer therein and at least one second frictional layer provided with a second electrode are alternately laminated.

9. The triboelectric energy harvesting device of claim 1 , wherein at least one of the first and second frictional layer has elasticity of about 10% to about 1000%.

10. The triboelectric energy harvesting device of claim 1 , wherein at least one of the first and second surfaces has a pattern structure having an uneven shape.

11. The triboelectric energy harvesting device of claim 10 , wherein the pattern structure is formed to have intervals of about 1 nm to about 1000 nm.

12. The triboelectric energy harvesting device of claim 10 , wherein the pattern structure comprises a plurality of protrusions which protrude from at least one of the first and second surfaces, and
at least one of the protrusions comprises at least one of a pyramidal, pillar, and hemispherical shape.

13. The triboelectric energy harvesting device of claim 1 , wherein the lattice structure is formed to have intervals of about 1 μm to about 1000 μm.

14. The triboelectric energy harvesting device of claim 1 , wherein the spacer is formed to have intervals different from each other in at least two or more regions on the first surface.

15. A method for manufacturing a triboelectric energy harvesting device comprising:
manufacturing a first frictional layer provided with a first surface having first electron affinity;
manufacturing a second frictional layer provided with a second surface having second electron affinity; and
disposing the first and second frictional layers such that the first and second surfaces face each other,
wherein at least one of the first and second frictional layers is manufactured to have an elastic material and an elastic structure,
wherein the first frictional layer comprises a spacer formed on the surface to form a space part bet the first and the second frictional layers such that the second surface is spaced apart from the first surface, and an end of the spacer being brought into contact with the second surface,
wherein the spacer has elasticity, the spacer being d of the same material as the first surface of the first frictional layer, and
wherein the spacer is formed in a lattice structure on the first surface.

16. The triboelectric energy harvesting device of claim 15 , wherein the manufacturing of the first frictional layer comprising:
manufacturing a mold having a reverse pattern structure of a first pattern structure having an uneven shape on the first surface;
forming a groove having a reverse shape to a spacer on the mold;
applying and curing a material for forming the first frictional layer on the mold; and
separating the first frictional layer from the mold.

17. The triboelectric energy harvesting device of claim 15 , wherein at least one of the first and second frictional layers is formed through at least one selected from a photography method, an imprinting method, an inkjet printing method, a drawing method, an electrospinning method, and an electrospray method.

18. The triboelectric energy harvesting device of claim 15 , further comprising forming electrode layers on the first and second frictional layers or inside the first and second frictional layers.

Assignees

• Univ Yonsei Iacf
• Ind Academic Cooperation Foundation Yonsei Unversity

Inventors

• Yeo Jong-Souk
• Lee Jun-Young

Classifications

• B29C41/003

  characterised by the choice of material · CPC title

• B29K2995/0003

  having particular electrical or magnetic properties, e.g. piezoelectric · CPC title

• B29L2031/48

  Wearing apparel · CPC title

• B29K2083/00

  Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as moulding material · CPC title

• B29C2043/3652

  Elastic moulds or mould parts, e.g. cores or inserts · CPC title