Advances in Solution‐Processed Textile Triboelectric Nanogenerators: Ink Formation, Processing Strategies, Applications, and Challenges

ABSTRACT Textile triboelectric nanogenerators (t‐TENGs) are a promising platform for self‐powered e‐textiles, converting mechanical human motion into electrical energy for harvesting and sensing, while benefiting from the softness, breathability, deformability, and large specific surface area offered by textile substrates. Among available fabrication strategies, solution processing is particularly attractive because it is additive, material‐efficient, roll‐to‐roll compatible, and readily adaptable to yarn‐ and fabric‐level functionalization under ambient or relatively low‐temperature conditions. This paper reviews solution‐processed t‐TENGs from the perspectives of printing techniques, ink formation, and applications. Key parameters governing functional ink design, including solvent selection, additive chemistry, rheological behavior, substrate wettability, and post‐treatment, are discussed. Printable inks are then categorized according to their function in the t‐TENGs, including conductive inks, tribo‐negative inks, and tribo‐positive inks, covering representative material systems based on metals, conductive polymers, carbon nanomaterials, silicones, fluoropolymers, and biodegradable polymers. The review further summarizes emerging applications of solution‐processed t‐TENGs in wearable power, self‐powered sensing, physiological monitoring, human–machine interfaces, and smart‐home systems, while discussing key challenges in durability, washability, environmental compatibility, scalable manufacturing, and power management. By linking material chemistry, ink design, textile processing, and device architecture, it provides practical guidance for developing high‐performance, scalable, and sustainable t‐TENGs.