Electrostatic energy harvester with improved transparency and mechanical property using two-dimensional material on ferroelectric or piezoelectric material

Patent metadata

Field	Value
Publication number	US-2016111978-A1
Application number	US-201514882766-A
Country	US
Kind code	A1
Filing date	Oct 14, 2015
Priority date	Oct 15, 2014
Publication date	Apr 21, 2016
Grant date	—

Abstract

Provided is an electrostatic energy harvester. A two-dimensionally structured material is transferred onto a ferroelectric or piezoelectric material layer, a property of the two-dimensionally structured material is controlled by poling performed on the ferroelectric or piezoelectric material to generate electric power generated by friction between the two-dimensionally structured material and a frictional charged material, and the electrostatic energy harvester has improved transparency and mechanical properties using the two-dimensionally structured material.
According to the present invention, the two-dimensionally structured material is transferred onto the ferroelectric or piezoelectric material layer, the property of the two-dimensionally structured material is controlled by poling performed on the ferroelectric or piezoelectric material to generate electric power generated by friction between the two-dimensionally structured material and the frictional charged material, and the electrostatic energy harvester with improved transparency and mechanical properties using a two-dimensionally structured material is obtained.

First claim

1 . An electrostatic energy harvester with improved transparency and mechanical properties using a material having a two-dimensional structure on a ferroelectric or piezoelectric material layer, comprising:
a lower electrode; a first material layer disposed on the lower electrode; a second material layer disposed on the first material layer; a frictional charged material positioned above the second material layer, configured to repeat contacting and non-contacting the second material layer, and formed of a material having a charging property opposite a charging property of the first material layer; and an upper electrode disposed on the frictional charged material, wherein the first material layer includes a ferroelectric or piezoelectric material layer on which poling is performed, and the second material layer is the material having the two-dimensional structure, and frictional electricity is generated when the frictional charged material is changed to a non-contact state with the second material layer from a contact state therewith.

2 . The electrostatic energy harvester of claim 1 , wherein the first material layer includes a ferroelectric or piezoelectric material layer on which poling and thermal treatment are performed.

3 . The electrostatic energy harvester of claim 1 , wherein the frictional charged material includes a transparent polymer material.

4 . The electrostatic energy harvester of claim 1 , wherein the lower electrode and the upper electrode include transparent electrodes.

5 . The electrostatic energy harvester of claim 1 , wherein positive or negative poling is performed on the ferroelectric or piezoelectric material layer based on a charging property related to the frictional charged material.

6 . The electrostatic energy harvester of claim 1 , further comprising withdrawable parts respectively connected to the lower electrode and the upper electrode, wherein an energy storage part is connected to the withdrawable parts.

7 . The electrostatic energy harvester of claim 1 , wherein rectifier diodes are respectively connected between the withdrawable parts and the energy storage part.

Assignees

• Univ Sungkyunkwan Res & Bus

Inventors

• Kim Sang Woo
• Kim Seong Su
• Lee Keun Young
• Ryu Han Joon
• Kim Tae Yun

Classifications

• H02N1/04 Primary

  Friction generators · CPC title