Thermoelectric properties of V2O5 nanosphere pellet

• DOI: 10.1016/j.matlet.2020.128394
• Publication Date: 2020-07-24T07:03:23Z
• Authors: Hyunki Kim; Top Khac Le; Manil Kang; Jae-Ki Lee; Su-Dong Park; Sok Won Kim
• Keywords: 0103 physical sciences; 01 natural sciences; 7. Clean energy

Abstract This study investigates the thermoelectric performance of a bulk-type pellet nanodevice fabricated with pressed V2O5 nanospheres synthesized by chemical reaction and sized 258 ± 27 nm. The following thermoelectric properties in the 300–773 K temperature range were analyzed: thermal conductivity (λ), electrical conductivity (σ), Seebeck coefficient (S), and figure of merit (ZT). The bulk-type pellet thermoelectric device exhibited a higher S and lower σ compared to the film-type device at 300 K. With increasing temperature, the absolute value of S and λ slightly decreased but the σ value increased. The power factor (PF) and ZT value at 773 K were 1.43 × 10−6 Wm−1K−2 and 1.4 × 10−3, respectively.