Flexible thermoelectric films from electrodeposited Bi2Te3 on recycled carbon fibre-Modulation of Seebeck coefficient by electrode pre-treatment

International Conference on Sustainable Energy and Green Technology 2018

能源学;生态环境科学

Jagadish, Priyanka R.^1 ; Phei Li, Lau^2 ; Cheah Su Fern, Erica^2 ; Ca Tou, Lim^2 ; Shi Pei, Ng^2 ; Beng Soon, Yeoh^2 ; Chan, Andy^3 ; Khalid, Mohammad^1 ; Chandran, Davannendran^1

Graphene and Advanced 2D Materials Research Group (GAMRG), School of Science and Technology Sunway University, No. 5, Jalan Universiti, Bandar Sunway, Selangor Darul Ehsan

47500, Malaysia^1

Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham, Malaysia Campus, Semenyih, Selangor

43500, Malaysia^2

Division of Environment, Faculty of Engineering, University of Nottingham, Malaysia Campus, Semenyih, Selangor

43500, Malaysia^3

关键词: Electrochemical polarization;    Elemental compositions;    Energy dispersive X ray spectroscopy;    Phosphate buffer solutions;    Properties improvements;    Thermo-electric modules;    Thermoelectric compound;    Thermoelectric properties;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/268/1/012161/pdf
DOI  :  10.1088/1755-1315/268/1/012161

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Recycled carbon fibre (RCF) sheets were electrodeposited with bismuth telluride (Bi2Te3), a state-of-art thermoelectric compound, to produce an n-type thermoelectric module which serves as a precursor to the development of a flexible thermoelectric module. The primary objective of this study is to determine the effects of electrode pre-treatment on the Seebeck coefficient and surface morphology of the RCF electrode. The RCF electrode pre-treatment methods include solvent cleaning via isopropanol, electrochemical polarization using phosphate buffer solution (PBS), and thermal annealing at 350°C with 5% hydrogen in argon gas. The main thermoelectric property, the Seebeck coefficient, which is a measure of the magnitude of an induced thermoelectric voltage due to the thermal gradient across the material, is reported. The surface morphologies and elemental composition of the post-electrodeposited carbon fibres were also studied and reported by Scanning Electron Microscopy (FESEM) and Energy Dispersive X-ray Spectroscopy (EDX). Electrochemical polarization method yielded -13.38 μV/K in Seebeck coefficient compared to -12.23 μV/K of control sample. Solvent cleaned and heat treated samples have lower Seebeck coefficient values of -10.70 μV/K and -10.71 μV/K respectively compared to control sample. SEM images show promising surface properties improvement of the electrodeposited RCF which have been subjected to pre-treatment.