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Molecular Foundry

HIGHLIGHTSExploring the Pb1-xSrxHfO3 System: High Capacitive Energy Storage Density and Efficiency
January 23, 2022

Scientific Achievement

Fig. (A) Crystal structure of CsGeX3; (B) Charge density map of a CsGeBr3 unit cell; (C) Ferroelectric domain imaging by piezo-response force microscopy; (D) Ferroelectric hysteresis loops.   

Full study of the Pb1-xSrxHfO3 system and identification of Pb0.5Sr0.5HfO3 as an exciting energy-storage material

Significance and Impact

Computational studies suggested PbHfO3 and SrHfO3 as potentially interesting polar materials, this work studied both and solid solutions between them and identified the best performance antiferroelectric for capacitive energy storage to date

Research Details

  • PbHfO3 -> readily produced, robust antiferroelectric material, likely to be a standard for the field
  • SrHfO3 -> Despite some studies suggesting it was ferroelectric, work here found that it was not
  • Pb0.5Sr0.5HfO3 ->Strontium alloying increases electrical breakdown strength, decreases hysteretic loss, and drives up capacitive energy storage density/efficiency
    M. Acharya, E. Banyas, M. Ramesh, Y. Jiang, A. Fernandez, A. Dasgupta, H. Ling, B. Hanrahan, K. Persson, J.B. Neaton, L.W. Martin, Adv. Mater. 34, 2105967 (2021) 10.1002/adma.202105967

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