High-performance PANI-coated Ag2Se nanowire and PVDF thermoelectric composite film for flexible energy harvesting

• Published in: Journal of alloys and compounds Vol. 884; p. 161098
• Main Authors: Park, Dabin, Kim, Minsu, Kim, Jooheon
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.12.2021; Elsevier BV
• Subjects: Carrier transport; Composite films; Conductive polymer; Energy harvesting; Flexible; Maximum power; Nanowires; Polyanilines; Polyvinylidene fluoride; Polyvinylidene fluorides; Power factor; Power generator; Synthesis; Thermoelectric; Thermoelectricity; Transport properties; Conductive polymer; Power generator; Thermoelectric; Flexible; Polyvinylidene fluoride; Composite films
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2021.161098

•PANI-coated Ag2Se nanowires/PVDF composite films were fabricated with simple solution mixing and drop casting method.•Synthesized composite shows outstanding thermoelectric performance and durability after 1000 times of bending cycle.•The simple thermoelectric devices consisting of 6 strips of composite film were produced.•Resulting thermoelectric device shown enhanced output voltage, power and power density. [Display omitted] Herein, polyaniline-coated silver selenide nanowire/polyvinylidene fluoride (PANI-Ag2Se/PVDF) composite are synthesized using simple approach and their application to flexible thermoelectric (TE) film are demonstrated. The TE power factor of PANI-Ag2Se filler was analyzed with various coating cycle of PANI, which was considered by carrier transport properties. For the composite film with 65 wt% of NWs an optimized power factor of ~ 196.6 μW/m K2 is obtained at 300 K. After bending for 1000 cycles, only ~ 8% of the initial power factor is decreased, exhibiting a flexibility. A 6-leg TE device assembled with the synthesized composite film, and this device generated ~ 15.4 mV and a maximum power of ~ 835.8 nW at a temperature difference (∆T) of ~ 30 K. Additionally, this flexible TE device displays a power density of ~ 2.33 W/m2 at same ∆T. This study can guide the manufacturing of high-performance flexible TE composite films consisting of inorganic/organic hybrid materials.