Enhanced energy storage properties in lead-free BaTiO@NaKNbO nano-ceramics with nanodomains: Via a core-shell structural design
Journal of Materials Chemistry C, ISSN: 2050-7526, Vol: 8, Issue: 15, Page: 5248-5258
2020
- 49Citations
- 6Captures
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Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
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Article Description
Achieving lead-free bulk ceramics with high energy storage densities has been a long-term goal pursued by researchers. Using a core-shell structural strategy, we achieved high comprehensive energy storage properties in relaxor ferroelectric BaTiO@NaKNbO (BT@KNN) nano-ceramics (194 nm) with rhombohedral and tetragonal nanodomains. The breakdown field strength (211 kV cm) was effectively enhanced by ultrafine-grains. Maximum polarization (21.3 μC cm) was increased and remanent polarization (3.3 μC cm) was reduced by the nanodomain. As a result, the polarization difference reached 18.0 μC cm, thus achieving a large energy storage density of 2.24 J cm and a recoverable energy storage density of 1.90 J cm with a high energy storage efficiency of 84.8%. The ceramics exhibit excellent dielectric properties and temperature stability over a wide temperature range (-60-130 °C). This work may provide a theoretical basis for the realization of next generation BT-based lead-free energy storage ceramics in the future.
Bibliographic Details
Royal Society of Chemistry (RSC)
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