Observation of electrocaloric effect, thermal energy harvesting and energy storage density capabilities in Eu3+ and Nb5+ co-substituted lead-free Na0.5Bi0.5TiO3 ceramics

2020 ◽  
Vol 20 (9) ◽  
pp. 1066-1072
Author(s):  
Kumara Raja Kandula ◽  
Radha Yanamandra ◽  
Posidevi bandi ◽  
Saket Asthana ◽  
Tirupathi Patri
Keyword(s):  
Energy Storage ◽  
Energy Harvesting ◽  
Thermal Energy ◽  
Lead Free ◽  
Energy Storage Density ◽  
Electrocaloric Effect ◽  
Storage Density ◽  
Thermal Energy Harvesting

Thermo-mechanical energy harvesting and storage analysis in 0.6BZT-0.4BCT ceramics

2021 ◽  
Author(s):  
Satyanarayan Patel ◽  
Manish Kumar ◽  
Yashwant Kashyap
Keyword(s):  
Energy Storage ◽  
Energy Harvesting ◽  
Thermal Energy ◽  
Mechanical Energy ◽  
Energy Storage Density ◽  
Storage Density ◽  
Thermal Energy Harvesting ◽  
Polarization Electric Field ◽  
And Storage ◽  
Olsen Cycle

Present work shows waste energy (thermal/mechanical) harvesting and storage capacity in bulk lead-free ferroelectric 0.6Ba(Zr0.2Ti0.8)O3-0.4(Ba0.7Ca0.3)TiO3 (0.6BZT-0.4BCT) ceramics. The thermal energy harvesting is obtained by employing the Olsen cycle under different stress biasing, whereas mechanical energy harvesting calculated using the thermo-mechanical cycle at various temperature biasing. To estimate the energy harvesting polarization-electric field loops were measured as a function of stress and temperatures. The maximum thermal energy harvesting is obtained equal to 158 kJ/m3 when the Olsen cycle operated as 25-81 °C (at contact stress of 5 MPa) and 0.25-2 kV/mm. On the other hand, maximum mechanical energy harvesting is calculated as 158 kJ/m3 when the cycle operated as 5-160 MPa (at a constant temperature of 25 °C) and 0.25-2 kV/mm. It is found that the stress and temperature biasing are not beneficial for thermal and mechanical energy harvesting. Further, a hybrid cycle, where both stress and temperature are varied, is also studied to obtain enhanced energy harvesting. The improved energy conversion potential is found as 221 kJ/m3 when the cycle operated as 25-81 °C, 5-160 MPa and 0.25-2 kV/mm. The energy storage density varies from 43 to 66 kJ/m3 (increase in temperature: 25-81 °C) and 43 to 80 kJ/m3 (increase in stress: 5 to 160 MPa). Also, the pre-stress can be easily implemented on the materials, which improve energy storage density almost 100% by domain pining and ferroelastic switching. The results show that stress confinement can be an effective way to enhance energy storage.

Enhanced Electrocaloric Effect and Energy Storage Density of Nd-Substituted 0.92NBT-0.08BT Lead Free Ceramic

2018 ◽  
Vol 215 (7) ◽  
pp. 1700915 ◽  
Author(s):  
Kumara R. Kandula ◽  
Krishnarjun Banerjee ◽  
Sai Santosh Kumar Raavi ◽  
Saket Asthana
Keyword(s):  
Energy Storage ◽  
Lead Free ◽  
Energy Storage Density ◽  
Electrocaloric Effect ◽  
Storage Density ◽  
Lead Free Ceramic

Large energy-storage density and positive electrocaloric effect in xBiFeO3–(1 − x)BaTiO3 relaxor ferroelectric ceramics

2022 ◽  
Author(s):  
Hui Tang ◽  
Xiang Niu ◽  
Peng-Fei Zhao ◽  
Xin-Gui Tang ◽  
Xiao-Dong Jian ◽  
...  
Keyword(s):  
Energy Storage ◽  
Relaxor Ferroelectric ◽  
Ferroelectric Ceramics ◽  
Large Energy ◽  
Energy Storage Density ◽  
Electrocaloric Effect ◽  
Storage Density ◽  
Relaxor Ferroelectric Ceramics

Large energy storage density and big electrocaloric strength in the BiFeO3–BaTiO3 system.

Lead‐free Ag 1−3 x La x NbO 3 antiferroelectric ceramics with high‐energy storage density and efficiency

2019 ◽  
Vol 102 (8) ◽  
pp. 4640-4647 ◽  
Author(s):  
Nengneng Luo ◽  
Kai Han ◽  
Laijun Liu ◽  
Biaolin Peng ◽  
Xinpeng Wang ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Energy ◽  
Lead Free ◽  
Energy Storage Density ◽  
Storage Density ◽  
High Energy Storage Density ◽  
High Energy Storage
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