Composition and strain engineered AgNbO3-based multilayer capacitors for ultra-high energy storage capacity

Li Feng Zhu, Lei Zhao, Yongke Yan, Haoyang Leng, Xiaotian Li, Li Qian Cheng, Xiangming Xiong, Shashank Priya

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Antiferroelectric (AFE) materials owing to their double-loop-shaped electric-field (E) dependent polarization (P) are considered quite promising for energy-storage capacitors. Among the large family of AFE materials, the AgNbO3composition is attractive not only because it is environmentally friendly, but also because it has high recoverable energy storage density (Wrec). However, the reported values ofWrec< 4 J cm−3in Ag(Nb0.85Ta0.15)O3multilayer capacitors are lower than that of the corresponding monolithic ceramic. This is attributed to high leakage current density (J) and inferior breakdown strength (BDS) in multilayer structures. Here we demonstrate that MnO2doping not only effectively reduces theJvalue and results in slimP-Eloops, but also enhances the breakdown strength (BDS). Multilayer capacitors with composition Ag(Nb0.85Ta0.15)O3+ 0.25 wt% MnO2(ANT + Mn) demonstrated an excellentWrec= 7.9 J cm−3and efficiencyη= 71%. Extensive investigations were conducted on ANT + Mn multilayer capacitors to demonstrate the role of strain engineering in enhancing the maximum polarization (Pmax) and ΔPvalues. Results reveal the effect of built-in stress in the active layers of multilayer capacitors on the magnitude ofPmax, remanent polarization (Pr) andWrec, and provide guidance towards the development of high energy storage density in multilayer capacitors.

Original languageEnglish (US)
Pages (from-to)9655-9664
Number of pages10
JournalJournal of Materials Chemistry A
Volume9
Issue number15
DOIs
StatePublished - Apr 21 2021

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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