Nanomaterials for Enhanced Thermoelectric Energy Conversion: Synthesis, Characterization, and Applications in Industrial Waste Heat Recovery

Abstract

Thermoelectric energy conversion presents a promising route for transforming waste heat into usable electrical energy, addressing both energy efficiency and sustainability concerns. The efficiency of thermoelectric devices is largely governed by the dimensionless figure of merit (ZT), which depends on the material’s Seebeck coefficient, electrical conductivity, and thermal conductivity. Nanostructured materials have shown immense potential in optimizing these properties simultaneously, thus enhancing thermoelectric performance. This paper provides a comprehensive review and analysis of various nanomaterials synthesized for thermoelectric applications, detailing the synthesis techniques, characterization methods, and material modifications that contribute to improved energy conversion. Additionally, it explores the practical application of these materials in industrial waste heat recovery systems, emphasizing the scalability, integration challenges, and future research directions.

Keywords: Thermoelectric materials, Nanostructures, Waste heat recovery, ZT enhancement, Seebeck coefficient, Thermal conductivity, Synthesis and characterization