Nanostructures for reduced lattice thermal conductivity - Case studies for nanopores and grain boundaries

Qing Hao, Dongchao Xu, Yue Xiao, Bo Xiao, Hongbo Zhao

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Solid-state thermoelectric devices have the ability to directly convert heat into electricity for power generation. A good TE material should possess a high electrical conductivity, a high Seebeck coefficient, and a low thermal conductivity. This requirement is hard to be satisfied within the same material. To address this issue, the nanostructuring approach has been widely used to reduce the lattice part of the thermal conductivity (kL) but still maintain the bulk electrical properties. High TE performance has thus been achieved in various nanostructured materials, such as nanoporous thin films and different nanostructured bulk materials. To better understand the observed kL reduction by nanostructures, two major types of nanostructured materials are studies here, including nanoporous thin films and nanograined bulk materials. In the latter case, a super-flexible thin film was hot pressed onto a wafer to represent a grain boundary.

Original languageEnglish (US)
Title of host publicationECS Transactions
EditorsC. O'Dwyer, J. Lee, J. H. He, K. M. Razeeb, R. Chen
PublisherElectrochemical Society Inc.
Pages67-75
Number of pages9
Volume80
Edition5
ISBN (Electronic)9781607685395
DOIs
StatePublished - Jan 1 2017
EventSymposium on Thermoelectric and Thermal Interface Materials 3 - 232nd ECS Meeting - National Harbor, United States
Duration: Oct 1 2017Oct 5 2017

Other

OtherSymposium on Thermoelectric and Thermal Interface Materials 3 - 232nd ECS Meeting
CountryUnited States
CityNational Harbor
Period10/1/1710/5/17

ASJC Scopus subject areas

  • Engineering(all)

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    Hao, Q., Xu, D., Xiao, Y., Xiao, B., & Zhao, H. (2017). Nanostructures for reduced lattice thermal conductivity - Case studies for nanopores and grain boundaries. In C. O'Dwyer, J. Lee, J. H. He, K. M. Razeeb, & R. Chen (Eds.), ECS Transactions (5 ed., Vol. 80, pp. 67-75). Electrochemical Society Inc.. https://doi.org/10.1149/08005.0067ecst