1. ELECTROSTATIC ENERGY STORAGE IN ANTIFERROELECTRIC LIKE PEROVSKITE
Tunisian Chemical Society
8th International Solid State Chemistry Conference
December 2017 –
Royal Thalassa Monastir Hotel, Skanes-Monastir, Tunisia
ELECTROSTATIC ENERGY STORAGE IN ANTIFERROELECTRIC LIKE PEROVSKITE
PRESENTED BY
ZANNEN Moneim
Co-authors : A. Lahmar, Z. Kutnjak, J. Belhadi , H. Khemakhem, M. El Marssi
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2. Outline ISSCC2017 Introduction Applications
Choice of N0.5Bi0.5TiO3 (NBT)
Experimental procedure
Results and discussions
Conclusions
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3. Introduction
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4. Perovskite structure (ABO3)
Why the Perovskite?
The flexibility of the possible ionic substitutions.
The simplicity of their crystallographic structure.
The remarkable versatility of the perovskite structure (the A- and B Sites can accommodate nearly every element of the periodic table) leads to a huge range of properties.[1]
[1]Schlom, D. G.; Chen, L.-Q.; Pan, X.; Schmehl, A.; Zurbuchen, M.A. “A Thin Film Approach to Engineering Functionality into Oxides”. J.Am. Ceram. Soc. 2008, 91, 2429−245
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5. Ferroelectricity/antiferroelectricity
antiferroelectric materials have a double hysterisis P-E loop.
Ferroelectric materials have permanent dipoles
A ferroeletric is generally defined as one of which exhibits hysterisis loop.
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6. Ferroelectricity vs Perovskite
The ferroelectricity in perovskite materials is due to B-cation center off
antiferroelectric materials have a double hysterisis P-E loop.
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7. Applications
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8. Applications
Microelectronic components
Multilayer capacitors
Electromechanical transducers
Infrared detectors
Ferroelectric-Perovskite materials presents a large wide domain of applications
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9. Energy Storage
[2] Xihong Hao , «A review on the dielectric materials for high energy-storage application », jOURNAL OF ADVANCED DIELECTRICS, Vol. 3, No. 1 (2013)
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10. Calculations
[3]
[3] X.H. Hao, Y. Wang, L. Zhang, L.W. Zhang, S.L. An, Appl. Phys. Lett. 102 (2013)
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11. Choice of Ba0.5Na0.5TiO3 (NBT)
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12. Most Studied Material PZT (Pb(ZrxTi1−x)O3 )
PLZT (Pb1−xLax(ZryTi1−y)1−x/4O3)
PMN (Pb(Mg1/3Nb2/3O3)- PT(PbTiO3)
Lead (Pb) release into the environment at time of processing and remain for a long time in the environment and accumulates in living tissues which damages the brain and nervous system.
It could introduce to the ecosystem and cause “acid rain”.
Restoring and recycling of lead-based materials is an extensive environmental issues.
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13. Why Ba0.5Na0.5TiO3 (NBT)? ISSCC2017
[4] Jürgen Rödel, Wook Jo, Klaus T. P. Seifert, Eva-Maria Anton, and Torsten Granzow, J. Am. Ceram. Soc., 92 [6] 1153–1177 (2009).
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14. Why Ba0.5Na0.5TiO3 (NBT)? Lead free compound.
Ferroelectric at room temperature.
Large Remnant polarization. Pr  38 C.cm-2
Bi3+ ions are isoelectronic configuration with Pb2+ , both showing a lone pair effect.
High coercive electrical field Ec  73 kV.mm−1
High conductivity
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15. Rare earth elements doped-NBT
Na1/2 Bi1/2 TiO3
Ln3+
Na1/2 (Bi1-xLnx)1/2TiO3
Ln3+: Ho3+, Er3+
Reduction of conductivity due to Bismuth volatilization.
Optical activities of rare earth elements.
Multifunctional Materials.
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16. Experimental procedure
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17. Experimental procedure Ferroelectric measurement
XRD
SEM
Ceramics/Films
Ferroelectric measurement
Photoluminescence
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18. Results and Discussions
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19. Results and discussions Pure Perovskite structure with R3c space group
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20. Results and discussions Reduction of grain size with dopant elements
NBT ceramic
NBT-Er ceramic
NBT-Ho ceramic
NBT thin film
NBT-Er thin film
NBT-Ho thin film.
Reduction of grain size with dopant elements
No evidence change
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21. Results and discussions Saturated P-E hysteresis loops for doped-NBT
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22. Results and discussions Antiferroelectric-like character
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23. Results and discussions
Material nature
composition
Pmax
(C. cm-2) E
(Kv/cm) W1
(J.cm-3) W2
η (%)
Ceramics
NBT
31.23 80
0.19
0.37
33.92
NBT- Er
26.41 95
0.18
0.11
62.06
NBT-Ho
21.06
0.13
0.09
59.09
Films
NBT (film)
61.03
500
12.31
10.87
53.1
NBT- Er (film)
40.25
9.26
6.98 57
NBT-Ho (film)
42.16
9.43
7.7
55.04
Interesting values of energy storage density for thin films
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24. Results and discussions
Many applications such as reprographics, holography, medical diagnostics, etc.
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25. Conclusions
Pure Perovskite structure without any symmetry change for doped samples.
The microstructure analysis of both ceramics and thin films showed high microstructure density for all specimens.
The stored and delivered energies were found to depend on the form and the
composition of the sample. Such type of material, already compatible with electronic application and thermally stable, can be used in the electric or hybrid vehicles and in parallel with the battery to supply a maximal power.
The trivalent holmium Ho3+ and Erbium Er3+emissions opens a great potential for application in photonics or optoelectronic devices.
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26. THANKS