Internet of Things (IoT) and recently Internet of Nano Things (IoNT) bear the
promise of new devices able to communicate and assist our daily lives toward
wearable technologies which demand a versatile integration such as in wireless
body networks (WBN), sensing, and health monitorization. These must comply
with stringent constraints on energy usage. Dimensions and complexity intensify
the need for small and maintenance-free power sources. Environment energy harvesting
and storage is an important approach to sustain operation for a long time.
Triboelectric nanogenerators (TENGs) arise as a strong and promising solution to
power the new field of outcoming self-sustainable devices, implantable, and
wearable devices. They can transform mechanical energy in different modes,
have simple structures, and use vulgar and sustainable materials. This paper
makes a review about TENGs technology, construction, materials, operation,
and focus on strategies for harvesting circuits. Main challenges like efficiency,
reliability, energy storage, and sustainability are discussed.