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Perovskite Srx(Bi1-xNa0.97-xLi0.03)0.5TiO3 ceramics with polar nano regions for high power energy storage
Wu, Jiyue Mahajan, Amit Riekehr, Lars Zhang, Hangfeng Yang, Bin Meng, Nan Zhang, Zhen Yan, Haixue
Wu, Jiyue
Mahajan, Amit
Riekehr, Lars
Zhang, Hangfeng
Yang, Bin
Meng, Nan
Zhang, Zhen
Yan, Haixue
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Other Contributors
EPub Date
Publication Date
2018-06-06
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Abstract
Dielectric capacitors are very attractive for high power energy storage. However, the low energy density of these capacitors, which is mainly limited by the dielectric materials, is still the bottleneck for their applications. In this work, lead-free single-phase perovskite Srx(Bi1-xNa0.97-xLi0.03)0.5TiO3 (x=0.30 and 0.38) bulk ceramics, prepared using solid-state reaction method, were carefully studied for the dielectric capacitor application. Polar nano regions (PNRs) were created in this material using co-substitution at A-site to enable relaxor behaviour with low remnant polarization (Pr) and high maximum polarization (Pmax). Moreover, Pmax was further increased due to reversible electric field induced phase transitions. Comprehensive structural and electrical studies were performed to confirm the PNRs and the reversible phase transitions. And finally a high energy density (1.70 J/cm3) with an excellent efficiency (87.2%) was achieved using the contribution of PNRs and field-induced transitions in this material, making it among the best performing lead-free dielectric ceramic bulk material for high energy storage.
Citation
J.Wu, A.Mahajan, L.Riekehr, H.Zhang, B.Yang, N.Meng, Z.Zheng, HX.Yan, Perovskite Srx(Bi1-xNa0.97-xLi0.03)0.5TiO3 ceramics with polar nano regions for high power energy storage, Nano Energy, 50 (2018), 723-732.
Publisher
Elsevier
Journal
Nano Energy
Research Unit
DOI
10.1016/j.nanoen.2018.06.016
PubMed ID
PubMed Central ID
Type
Article
Language
en
Description
Series/Report no.
ISSN
2211-2855