Enhancing Durability and Performance of Solid–Liquid Triboelectric Nanogenerators through Advanced Corrosion-Resistant Coatings

The creation of renewable energy sources needs to happen so that they can address the issue of energy deficits. These problems have been addressed by triboelectric nanogenerators that convert droplets, waves, and flows of mechanical power into electricity. This paper aims to review the antecedents of solid–liquid triboelectric nanogenerators (SL-TENG) while focusing on lightweight, cost efficiency, and sustainability. SL-TENGs are appropriate for industrial, environmental, and marine environments because of their capacity to convert liquid flow into electrical power. However, they have drawbacks, including material degradation, biofouling, corrosion, and ecological effects that constrain their performance and durability. It has been suggested that advanced materials and coatings, such as superhydrophobic surfaces, self-healing layers, and composites, be featured to overcome these challenges. Processes such as solgel deposition, plasma-enhanced techniques, and spray coatings boost their sturdiness and functionality. The paper focuses on performance reviews involving triboelectric output, corrosion, mechanical stability, and the ability to demonstrate how new designs and coatings have determined SL-TENG efficiency. Therefore, this review will be a clear roadmap to realize efficient and durable SL-TENG technologies for future energy harvesting systems.