US 11,870,372 B2
Flexible and hybrid energy harvesting device combining piezoelectric and electrostatic conversions
James West, Baltimore, MD (US); Ugur Erturun, Baltimore, MD (US); Sung Hoon Kang, Lutherville-Timonium, MD (US); and Adebayo Eisape, Baltimore, MD (US)
Assigned to THE JOHNS HOPKINS UNIVERSITY, Baltimore, MD (US)
Appl. No. 17/059,735
Filed by THE JOHNS HOPKINS UNIVERSITY, Baltimore, MD (US)
PCT Filed Jun. 11, 2019, PCT No. PCT/US2019/036481
§ 371(c)(1), (2) Date Nov. 30, 2020,
PCT Pub. No. WO2019/241202, PCT Pub. Date Dec. 19, 2019.
Claims priority of provisional application 62/683,448, filed on Jun. 11, 2018.
Prior Publication US 2021/0218350 A1, Jul. 15, 2021
Int. Cl. H02N 2/18 (2006.01); H02N 1/08 (2006.01); H10N 30/30 (2023.01); H10N 30/85 (2023.01); H10N 30/87 (2023.01)
CPC H02N 2/186 (2013.01) [H02N 1/08 (2013.01); H02N 2/181 (2013.01); H10N 30/30 (2023.02); H10N 30/852 (2023.02); H10N 30/872 (2023.02)] 18 Claims
OG exemplary drawing
 
1. An energy harvesting device for energy harvesting, comprising:
a piezoelectric harvester comprising a first piezoelectric electrode, a second piezoelectric electrode, and a piezoelectric nanocomposite positioned between the first piezoelectric electrode and the second piezoelectric electrode; and
an electrostatic harvester comprising a first electrostatic electrode, a second electrostatic electrode, and an electret film positioned between the first electrostatic electrode and the second electrostatic electrode,
wherein the piezoelectric nanocomposite is physically positioned between the first piezoelectric electrode and the first electrostatic electrode, and
wherein the first electrostatic electrode, the second electrostatic electrode, and the electret film are positioned directly between the first piezoelectric electrode and the second piezoelectric electrode.