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YANG, Hui-Jing, LU, Zhilun, LI, Linhao, BAO, Weichao, JI, Hongfen, LI, Jinglei, FETEIRA, Antonio, XU, Fangfang, ZHANG, Yong, SUN, Huajun, HUANG, Zhichao, LOU, Weichao, SONG, Kaixin, SUN, Shikuan, WANG, Ge, WANG, Dawei and REANEY, Ian M (2020). Novel BaTiO3-based, Ag/Pd compatible lead-free relaxors with superior energy storage performance. ACS Applied Materials and Interfaces.
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Abstract
Ceramic dielectrics are reported with superior energy storage performance for applications, such as power electronics in electrical vehicles. A recoverable energy density (Wrec) of ∼4.55 J cm–3 with η ∼ 90% is achieved in lead-free relaxor BaTiO3-0.06Bi2/3(Mg1/3Nb2/3)O3 ceramics at ∼520 kV cm–1. These ceramics may be co-fired with Ag/Pd, which constitutes a major step forward toward their potential use in the fabrication of commercial multilayer ceramic capacitors. Compared to stoichiometric Bi(Mg2/3Nb1/3)O3-doped BaTiO3 (BT), A-site deficient Bi2/3(Mg1/3Nb2/3)O3 reduces the electrical heterogeneity of BT. Bulk conductivity differs from the grain boundary only by 1 order of magnitude which, coupled with a smaller volume fraction of conducting cores due to enhanced diffusion of the dopant via A-site vacancies in the A-site sublattice, results in higher breakdown strength under an electric field. This strategy can be employed to develop new dielectrics with improved energy storage performance.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | 03 Chemical Sciences; 09 Engineering; Nanoscience & Nanotechnology |
| Identification Number: | https://doi.org/10.1021/acsami.0c13057 |
| SWORD Depositor: | Symplectic Elements |
| Depositing User: | Symplectic Elements |
| Date Deposited: | 22 Sep 2020 13:08 |
| Last Modified: | 17 Mar 2021 22:45 |
| URI: | https://shura.shu.ac.uk/id/eprint/27278 |
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