Hexagonal boron nitride nanosheets doped pyroelectric ceramic composite for high-performance thermal energy harvesting

Qingping Wang, Chris R. Bowen, Rhodri Lewis, Jun Chen, Wen Lei, Haibo Zhang, Ming Yu Li, Shenglin Jiang

Research output: Contribution to journalArticle

3 Citations (Scopus)
2 Downloads (Pure)

Abstract

Recently, recycling energy from wasted heat with pyroelectric materials has received significant attention. However, pyroelectric energy harvesters generally suffer from a low energy efficiency due to the low rates of heat transfer. Here, we report high-performance thermal energy harvesting using novel hybrid pyroelectric ceramics with greatly improved heat transfer and rate of temperature changes. This is achieved by evenly dispersing 0.1 wt% hexagonal boron nitride (hBN) nanosheets into a Pb[(Mn 1/3 Nb 2/3 ) 1/2 (Mn 1/3 Sb 2/3 ) 1/2 ] 0.04 (Zr 0.95 Ti 0.05 ) 0.96 O 3 (lead magnesium niobate-lead antimony-manganese-lead zirconate titanate: PMN-PMS-PZT) ceramic matrix. Due to the vibrations of whole chain and phonon scattering, heat transfer through the hybrid crystalline chain is more efficient than that of unfilled PMN-PMS-PZT. It is demonstrated that the harvested power was increased by up to 65.6%. This work paved an efficient and cost-effective way to largely improve the traditional pyroelectric ceramic for thermal energy harvesting.

Original languageEnglish
Pages (from-to)144-152
Number of pages9
JournalNano Energy
Volume60
Early online date13 Mar 2019
DOIs
Publication statusPublished - 30 Jun 2019

Keywords

  • Hexagonal boron nitride
  • Pyroelectric ceramic
  • Thermal conductivity
  • Thermal energy harvesting

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)
  • Electrical and Electronic Engineering

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