Superior energy storage BaTiO3-based amorphous dielectric film with polymorphic hexagonal and cubic nanostructures

Xuewen Jiang, Jiahao Lv, Zibin Chen, Zhonghui Shen, Jian Wang, Zhao Deng, Minghe Cao, Zhonghua Yao, Shujun Zhang, Hanxing Liu, Hua Hao

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

An effective route to improve the energy storage performance by constructing polymorphic nanostructures in (1-x)BaTiO3-xBi(Zn1/2Zr1/2)O3 (BT-BZZ) films was proposed. The finite element simulation method was used to simulate the impacts of amorphous/crystalline phase and volume fraction on the electric field and polarization distributions. Together with the experimental observation, it is confirmed that an appropriate amorphous/crystalline structure volume fraction is conducive to the energy storage properties. Of particular significance is that Mn dopant in the 0.94BT-0.06BZZ films induces hexagonal BT phase with higher polarization compared with that of cubic phase, leading to a high energy density of 85 J/cm3 and greatly improved energy efficiency of 84% in 3Mn-0.94BT-0.06BZZ film. The existence of the amorphous structure and local polymorphic hexagonal/cubic nanostructures is confirmed by the aberration-corrected scanning transmission electron microscopy, which synergistically contribute to the greatly enhanced energy storage properties, providing a new design paradigm for high performance dielectric materials.

Original languageEnglish
Article number133447
JournalChemical Engineering Journal
Volume431
Issue number4
DOIs
Publication statusAccepted/In press - 2021
Externally publishedYes

Keywords

  • Amorphous structure
  • BaTiO-based
  • Dielectric film
  • Energy storage property
  • Nanocrystalline

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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