Enhanced Thermoelectric Properties of Skutterudite Thick Film Polyvinyl Alcohol Assisted from the Post-Deposition Annealing Effect

Nuur Syahidah Sabran, Iman Aris Fadzallah, Mohd Faizul Mohd Sabri, Takahito Ono, Khairul Fadzli Samat, Siti Nor Farhana Yusuf, Rahman Saidur

Research output: Contribution to journalArticlepeer-review

Abstract

Thick film has demonstrated a high Seebeck coefficient, S, for thermoelectric material but it is very challenging to obtain through cost-effective techniques. Electrodeposition is adopted to tailor the film's thickness, t, facilitated by additive and heat treatment to boost the S. Here, we report the influence of two varied molecular weight (Mw) of polyvinyl alcohol (PVA) as additive and the post-deposition annealing temperature on Skuterrudite (cobalt triantimonide, CoSb3) thick films. The films are synthesized at room temperature via chronoamperometry from an aqueous electrolyte consisting of cobalt and antimony ions assisted with PVA (1800 and 98 000 Da). Higher Mw exhibits fine grains and uniform layers with the t of ∼13 μm in 2 h deposition time due to the greater ion diffusion coefficient, D (1.52 × 10-5 cm2s-1). The post-deposition annealing on the CoSb3 thick film of higher Mw PVA assisted revealed significant enhancement of the S and power factor, PF by over 100% as compared to the as-deposited film. Low electrical conductivity, σ of 7.53 kSm-1 contributes to the high S and PF (annealed at 373.15 K) of 222.75 μVK-1 and 558.17 μWm-1K-2, respectively. This work demonstrates that post-deposition annealing has a prominent effect on thermoelectric properties.

Original languageEnglish
Article number072508
JournalJournal of the Electrochemical Society
Volume168
Issue number7
DOIs
Publication statusPublished - 2021 Jul

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Fingerprint

Dive into the research topics of 'Enhanced Thermoelectric Properties of Skutterudite Thick Film Polyvinyl Alcohol Assisted from the Post-Deposition Annealing Effect'. Together they form a unique fingerprint.

Cite this