Wearable electronic textiles (e-textiles) and the Internet of Things (IoT) have encouraged extraordinary developments, stimulating advances in biosensors, smart wearable systems, and cutting-edge solutions for healthcare and portable electronics. The rise in the number of sensors in e-textile devices promptly correlates with an increase in power demand. However, existing power sources, such as rechargeable or electrochemical batteries, are not only rigid and bulky but also suffer from short lifespans, posing significant barriers to the scalability of wireless sensors and wearable devices. There remains an urgent unmet need for a sustainable, flexible, wearable and durable power source for wearable e-textiles. Furthermore, the rapid trend towards miniaturisation, as well as the growing emphasis on wearability in portable electronics, needs a fundamental re-evaluation of both design principles and operational requirements. Triboelectric Nanogenerator (TENG) stands out as one of the most promising emerging renewable energy harvesting technologies for wearable applications. Such devices are capable of harnessing diverse forms of mechanical energy like vibrations, pressure, and rotations, and converting them into direct current (DC) electricity. Triboelectric charges build on the surfaces where two different materials with dissimilar electron affinities meet under mechanical stress or deformation, resulting in the generation of a potential difference between the two electrodes and can be utilized directly to power electronics like LEDs or mini watches. Additionally, the electricity generated can be stored in electrochemical batteries or supercapacitors, enabling the operation of various portable devices. Textile-based TENGs have recently emerged as self-powered sources for e-textile applications, attracting considerable attention due to its lightweight, flexible and wearable nature. However, their low power-generating capabilities indicate ample opportunity for further development in creating self-sufficient power sources for wearable e-textiles.