Nanogenerator

A nanogenerator is a small-scale energy harvesting device that converts ambient mechanical, and thermal energy into electrical energy at the nanoscale. By capturing energy from sources such as body movements, vibrations, or temperature differences, nanogenerators offer a sustainable, self-sufficient, and environmentally friendly power solution for various applications. It can be used to power micro- and nanoscale electronic devices, sensors, and actuators, eliminating the need for traditional batteries or power sources. Key areas of application for nanogenerators include wearable electronics, remote sensing, environmental monitoring, and medical devices. As research and development continue to advance, nanogenerators hold great potential for shaping future energy-harvesting technologies and transforming the way we power small-scale devices.

1) Triboelectric Nanogenerator

The triboelectric nanogenerator (TENG) is an energy-harvesting device that utilizes the principles of the triboelectric effect and electrostatic induction to convert mechanical energy into electrical energy. It consists of two materials with distinct triboelectric properties that are brought into contact and then separated, creating an electric potential difference between them. Under external mechanical stimulation, such as deformation or vibration, the materials undergo relative motion, generating electrical energy. The TENG has wide-ranging applications in fields like wearable electronics, environmental monitoring, and self-powered sensors.

Design of triboelectric materials for high performance of TENG

Design the structure of triboelectric nanogenerator

Direct-current triboelectric nanogenerator

2) Piezoelectric Nanogenerator & Piezotronics

A piezoelectric nanogenerator (PENG) is an highly sensitive device that relies on mechanical force. Piezoelectricity refers to the alteration in electric polarization that occurs when stress is applied. Energy generation through polarization change is only possible with certain materials that possess either a non-central symmetric crystal structure or ferroelectric properties. Two modes of energy harvesting are 1) the vertical force mode and 2) the bending mode. We have conducted research on all harvesting modes and explored various materials, especially depending on 2D materials.

Piezoionic strain sensor based on solid polymer electrolyte

Temperature-dependence of piezotronic effect