This masters thesis presents a literature review of widely used ink-based manufacturing techniques, ink-based materials used in energy harvesting. their preparation and applications in human-integrated energy harvesting devices. In addition, the challenges, and opportunities in this area of study is discussed. Lastly, the experimental methodology and results of a stencil printed PVA-gelatin composite ink based flexible triboelectric nanogenerator used for human-integrated energy harvesting is summarized.