Formulation of new screen printable PANI and PANI/Graphite based inks: Printing and characterization of flexible thermoelectric generators

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Abstract

The dearth of information about the fabrication of flexible polyaniline and graphite-based microporous and low-cost thermoelectric generators using screen printing for low-temperature applications has motivated us to undertake this research work. Polyaniline and graphite composite inks were formulated using cellulose acetate as resin and diacetone alcohol as the solvent. In this work, we have studied the influence of ink ingredients on the thermoelectric properties of composite inks. Diacetone alcohol improved the electrical conductivity of polyaniline by 7.9 times. The carrier concentrations and carrier mobility of composite ink were enhanced by 2.8 times. Simultaneously, cellulose acetate increased resistivity and carrier mobility of polyaniline by 13 and 44 times, respectively. Graphite improved the crystallinity but reduced carrier mobility, carrier concentration, and bandgap of the composite inks. Screen-printed porous ink film structure reduced the thermal conductivity of PANI ink by 11 times at 333 K. The maximum Seebeck coefficient and power output exhibited by the fabricated thermoelectric generator were 244.34 μV/K and 4.31 nW, respectively at 77 K. Present work explored fabrication and characterization of low cost, flexible polyaniline and graphite composite ink-based thermoelectric generator with improved Seebeck coefficient and power output for low-level heat energy conversion.

Original languageEnglish
Article number121680
JournalEnergy
Volume238
DOIs
Publication statusPublished - 01-01-2022

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Modelling and Simulation
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Pollution
  • Energy(all)
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Management, Monitoring, Policy and Law
  • Electrical and Electronic Engineering

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