Interface driven energy-filtering and phonon scattering of polyaniline incorporated ultrathin layered molybdenum disulphide nanosheets for promising thermoelectric performance

R Abinaya; J Archana; S Harish; M Navaneethan; C Muthamizhchelvan; S Ponnusamy; H Udono; R Sugahara; Y Hayakawa; M Shimomura

doi:10.1016/j.jcis.2020.09.061

Interface driven energy-filtering and phonon scattering of polyaniline incorporated ultrathin layered molybdenum disulphide nanosheets for promising thermoelectric performance

J Colloid Interface Sci. 2021 Feb 15:584:295-309. doi: 10.1016/j.jcis.2020.09.061. Epub 2020 Sep 23.

Authors

R Abinaya¹, J Archana², S Harish³, M Navaneethan⁴, C Muthamizhchelvan¹, S Ponnusamy¹, H Udono⁵, R Sugahara⁵, Y Hayakawa⁶, M Shimomura⁷

Affiliations

¹ Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRMIST, Kattankulathur 603 203, Tamil Nadu, India.
² Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRMIST, Kattankulathur 603 203, Tamil Nadu, India. Electronic address: jayaram.archana@gmail.com.
³ Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRMIST, Kattankulathur 603 203, Tamil Nadu, India; Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka 432-8011, Japan.
⁴ Functional Materials and Energy Devices Laboratory, Department of Physics and Nanotechnology, SRMIST, Kattankulathur 603 203, Tamil Nadu, India; Nanotechnology Research Center (NRC), Faculty of Engineering and Technology, SRM Institute of Science and Technology, Kattankulathur, Chennai, 603203, Tamil Nadu, India. Electronic address: m.navaneethan@gmail.com.
⁵ Ibaraki University, Graduate school of science and engineering, Ibaraki 310-8512, Japan.
⁶ Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka 432-8011, Japan; Research Institute of Electronics, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka 432-8011, Japan.
⁷ Graduate School of Science and Technology, Shizuoka University, 3-5-1 Johoku, Naka-Ku, Hamamatsu, Shizuoka 432-8011, Japan.

PMID: 33069028
DOI: 10.1016/j.jcis.2020.09.061

Abstract

The hybrid of organic conducting polymers and inorganic materials with ultralow thermal conductivity, which is a promising strategy for the realization of polymer based effective thermoelectric (TE) applications. In this work, ultrathin layered molybdenum disulphide (MoS₂) nanosheets/PANI nanocomposites are prepared by hydrothermal route. The effect of varying PANI wt% in the nanocomposites and its interface effect on thermoelectric properties are well investigated. The successful incorporation of PANI between the MoS₂ layers confirmed by high resolution transmission electron microscope (HRTEM). The significantly enhanced potential difference of MoS₂/ PANI nanocomposites with increasing PANI content is well clarified by the increased Seebeck value. The variable range hopping property is identified and conductivity is raised up highly due to insertion of PANI in layered van der Waal's gap of MoS₂. The effective interface facilitates charge for fast transport. The reduced thermal conductivity is observed of about 0.248 W*m^-1*K^-1 for 2.5 wt% addition of PANI. The key factor is that the stability of the sample is improved for MoS₂/ PANI nanocomposites than pristine MoS₂. Our work paved a new approach to improve TE performance by preparing TE MoS₂ material through simple chemical route.

Keywords: Interface; Molybdenum disulphide (MoS(2))t; Nanosheets; PANI; Ultralow thermal conductivity.