© 2021 Elsevier B.V.Textile-based devices have attracted great attention in wearable electronics with their light weight, small size, wearability and excellent flexibility. Moreover, designing such devices properly is as important as their functionality. Wearable devices have to supply the power by themselves, which raised interest for the studies in this area. In this context, the devices known as triboelectric nanogenerators (TENG), which have a simple operating mechanism and easy design, and which convert biomechanical energy into electrical energy, are considered as the new generation energy harvesting technology. This study defines the TENG model using Maxwell's displacement current and it includes the discussions on recent studies, as well as the factors affecting TENG's efficiency. In addition to the literature review, new suggestions are also submitted for the researchers.