Cited 6 time in webofscience Cited 6 time in scopus

Synchronized enhancement of thermoelectric properties of higher manganese silicide by introducing Fe and Co nanoparticles

Title
Synchronized enhancement of thermoelectric properties of higher manganese silicide by introducing Fe and Co nanoparticles
Authors
Kim, GwansikKim, Hyun-SikLee, Ho SeongKim, JeongminLee, Kyu HyoungRoh, Jong WookLee, Wooyoung
DGIST Authors
Kim, Jeongmin
Issue Date
2020-06
Citation
Nano Energy, 72, 104698
Type
Article
Article Type
Article
Author Keywords
NanocompositeThermoelectricHigher manganese silicideNanometal decorationEnergy filtering effect
Keywords
THERMAL-CONDUCTIVITYMNSI-GAMMAPERFORMANCEFIGUREMERIT
ISSN
2211-2855
Abstract
Introduction of nanophases is known to be effective in improving thermoelectric performance as it allows the simultaneous engineering of electronic and thermal transports. In this study, we synthesized Fe and Co nanoparticle-embedded MnSi1.787Al0.01 nanocomposites through a simple nanometal-decoration technique and spark plasma sintering. The nanoparticles introduced in the matrix caused energy band bending at the matrix–nanoparticle interface, which induced charge transfer and energy filtering effects. These two seemingly opposing effects were combined so as to increase the power factor of the nanocomposites by enhancing the electronic transport. Moreover, we found that the lattice thermal conductivity decreased owing to intensified phonon scattering. Hence, a maximum ZT of 0.53 (at 773 K) was achieved in 0.6 vol% Fe nanoparticle-embedded nanocomposites, which is 25% higher than that of the pristine sample. © 2020 Elsevier Ltd
URI
http://hdl.handle.net/20.500.11750/11874
DOI
10.1016/j.nanoen.2020.104698
Publisher
Elsevier BV
Related Researcher
  • Author Kim, Jeongmin  
  • Research Interests Thermoelectric Materials / Nano Materials / Charge and Heat Transport Phenomena / Transport Measurement in Low-dimensional Materials
Files:
There are no files associated with this item.
Collection:
Division of Nanotechnology1. Journal Articles


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