Zr-MOF/Polyaniline Composite Films with Exceptional Seebeck Coefficient for Thermoelectric Material Applications

Chih Chien Lin, Yi Chia Huang, Muhammad Usman, Wen Hsuan Chao, Wei Keng Lin, Tzuoo Tsair Luo, Wha Tzong Whang, Chun-Hua Chen*, Kuang Lieh Lu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Controlling the polymerization of aniline in the presence of zirconium-based metal-organic frameworks (Zr-MOFs) using polystyrene sulfonic acid as a dopant resulted in the formation of a new type of free-standing thermoelectric composite film. Polyaniline chains interpenetrate into the Zr-MOFs to enhance the crystallinity of polyaniline, resulting in an improved degree of electrical conductivity. In addition, the inherent porosity of the Zr-MOFs functions to suppress the increase in thermal conductivity, thus dramatically promoting a negative Seebeck coefficient. When 20 wt % Zr-MOF was used, a power factor of up to 664 μW/(m K 2 ) was obtained, which was accompanied by a surprisingly large, negative Seebeck coefficient. The new class of MOF-based composites offers a new direction for developing new types of efficient thermoelectric materials.

Original languageEnglish
Pages (from-to)3400-3406
Number of pages7
JournalACS Applied Materials and Interfaces
Volume11
Issue number3
DOIs
StatePublished - 23 Jan 2019

Keywords

  • Seebeck coefficient
  • composites
  • metal-organic frameworks
  • polyaniline
  • thermoelectric materials

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