Electrical engineering

Physics

Charge density

Nanotechnology

Electrode

Nanogenerator

Mechanical energy

Engineering

Voltage

Excited state

Atomic physics

Composite material

Power (physics)

Electrostatic induction

Materials science

Power density

Quantum mechanics

Optoelectronics

Triboelectric effect

Nature Communications

Non-contact triboelectric nanogenerator (TENG) enabled for both high conversion efficiency and durability is appropriate to harvest random micro energy owing to the advantage of low driving force. However, the low output (&lt;10 μC m −2 ) of non-contact TENG caused by the drastic charge decay limits its application. Here, we propose a floating self-excited sliding TENG (FSS-TENG) by a self-excited amplification between rotator and stator to achieve self-increased charge density, and the air breakdown model of non-contact TENG is given for a maximum charge density. The charge density up to 71.53 μC m −2 is achieved, 5.46 times as that of the traditional floating TENG. Besides, the high output enables it to continuously power small electronics at 3 m s −1 weak wind. This work provides an effective strategy to address the low output of floating sliding TENG, and can be easily adapted to capture the varied micro mechanical energies anywhere.

High performance floating self-excited sliding triboelectric nanogenerator for micro mechanical energy harvesting