Dual Mode TENG with Self‐Voltage Multiplying Circuit for Blue Energy Harvesting and Water Wave Monitoring

Abstract As the most extensive natural energy on earth, ocean wave energy is regarded as a difficult energy to be fully and efficiently utilized because of its low frequency and multi‐direction movement. Herein, a versatile blue energy triboelectric nanogenerator (VBE‐TENG) fabricated by using dual‐mode output terminals with charge excitation strategy is reported, which can harvest varying water‐wave energy effectively. Benefiting from the rolling ball on a specific track and the compression rebound characteristics of a spring sheet steel, the carrier can be driven along a specific path through random ocean wave energy, and then the energy is converted into electricity by VBE‐TENG. A high peak output power of 34.3 mW is obtained, 2.5 times as much as that of current highest record based on a device unit in blue energy TENG. In addition, the TENG can light 256 LEDs and continuously power commercial electronic devices in wave environments. The average peak voltage of contact‐separation TENG is converted into virtual signal via Labview software to provide wave height monitoring as a self‐powered sensing system. This work provides a new approach in blue energy TENG toward practical applications.