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Impacts of annealing temperature and time on the thermoelectric performance of recycled carbon fiber (RCF)/n-Bi2Te3 heterostructure thermoelectric composites.

Jagadish, Priyanka; Khalid, Mohammad; Wong, Weng Pin; Phei Li, Lau; Chelvanathan, Puvaneswaran; Walvekar, Rashmi; Mubarak, N.M.; Chan, Andy

Authors

Priyanka Jagadish

Mohammad Khalid

Weng Pin Wong

Lau Phei Li

Puvaneswaran Chelvanathan

Rashmi Walvekar

N.M. Mubarak



Abstract

Recycling carbon fibre waste is crucial for sustainability in the composites industry. Herein, we report the fabrication of a heterostructure composite using recycled carbon fiber (RCF) and n-type bismuth telluride (n-Bi2Te3) for thermoelectric applications. In the present study, we have comprehensively investigated the effects of annealing temperature and time on the thermoelectric, structural, charge carrier transport, morphological, and thermal stability properties of annealed RCF/n-Bi2Te3 composites. The optimum annealing temperature and time were at 350 °C and 2 h, respectively, which yielded a maximum power factor of 7.83 μWK−2m−1. Annealing redistributed the bismuth and tellurium atomic percentage, decreased carrier concentration, improved carrier mobility, enhanced the crystallinity and increased the grain size of the bismuth telluride particles, subsequently improving the thermoelectric performance as well as the thermal stability of annealed RCF/n-Bi2Te3 composites. In addition, this study has explored the plausibility of a cross-plane configured Seebeck coefficient measurement utilizing recycled carbon fibre/n-type bismuth telluride heterostructure thermoelectric composite. Energy band diagram analysis indicated favorable heterojunction alignment between RCF and n-Bi2Te3, validating the viability of the thermoelectric composite in a cross-plane configuration. Our study provides a promising route for closing the recycling loop of carbon fiber waste and achieving sustainable thermoelectric materials.

Citation

JAGADISH, P., KHALID, M., WONG, W.P., PHEI LI. L., CHELVANATHAN, P., WALVEKAR, R., MUBARAK, N.M. and CHAN, A. 2023. Impacts of annealing temperature and time on the thermoelectric performance of recycled carbon fiber (RCF)/n-Bi2Te3 heterostructure thermoelectric composites. ECS journal of solid state science and technology [online], 12(6), article number 061004. Available from: https://doi.org/10.1149/2162-8777/acdd98

Journal Article Type Article
Acceptance Date Jun 5, 2023
Online Publication Date Jun 21, 2023
Publication Date Jun 30, 2023
Deposit Date Jun 30, 2023
Publicly Available Date Jun 22, 2024
Journal ECS journal of solid state science and technology
Print ISSN 2162-8769
Electronic ISSN 2162-8777
Publisher Electrochemical Society
Peer Reviewed Peer Reviewed
Volume 12
Issue 6
Article Number 061004
DOI https://doi.org/10.1149/2162-8777/acdd98
Keywords Thermoelectric materials; Composite materials; Carbon fibre waste; Sustainable manufacturing; Thermoelectric; Bismuth telluride (Bi2Te3); Annealing; Recycled carbon fibre (RCF); Seebeck coefficient
Public URL https://rgu-repository.worktribe.com/output/1998137