Johns Hopkins University

Ticona Gmbh

Gerhard Sessler

James Edward West

Wilfried Hatke

Adebayo Eisape

Ugur Erturun

Kailang Ren

Guo-Mao Yang

Provided is an energy harvesting system, including: a first electrode; a second electrode; a non-metalized mono-charged electret diaphragm disposed between the first and second electrodes; a base; a spring extending between the base and the electret diaphragm; and a rod in communication with the electret diaphragm and for manipulating a position of the electret diaphragm relative to the first and second electrodes.

Push-pull electret transducer with controlled restoring force for low frequency microphones and energy harvesting

Electrets can be produced from cycloolefin copolymers (COCs), and charges applied thereto are stable for long periods, even at high temperatures and high relative humidities. The reduction here in a positive charge applied to the COCs is smaller than that of negative charges applied to the COCs. The stability over time of the charges applied is impaired by adding polar additives, such as inorganic silicon compounds. Films, fibers or nonwovens produced from electrets can be processed to give filters.

Electrets

Growing community of inventors

Darmstadt, Germany

Gerhard Sessler