Novel BaTiO3-Based, Ag/Pd-Compatible Lead-Free Relaxors with Superior Energy Storage Performance

Yang, Huijing; 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; Reaney, Ian M.

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.

Citation

Yang, H., Lu, Z., Li, L., Bao, W., Ji, H., Li, J., Feteira, A., Xu, F., Zhang, Y., Sun, H., Huang, Z., Lou, W., Song, K., Sun, S., Wang, G., Wang, D., & Reaney, I. M. (2020). Novel BaTiO3-Based, Ag/Pd-Compatible Lead-Free Relaxors with Superior Energy Storage Performance. ACS applied materials & interfaces, 12(39), 43942-43949. https://doi.org/10.1021/acsami.0c13057

• Journal Article Type: Article
• Acceptance Date: Sep 4, 2020
• Online Publication Date: Sep 4, 2020
• Publication Date: Sep 30, 2020
• Deposit Date: Oct 23, 2021
• Publicly Available Date: Oct 25, 2021
• Journal: ACS Applied Materials & Interfaces
• Print ISSN: 1944-8244
• Electronic ISSN: 1944-8252
• Publisher: American Chemical Society
• Peer Reviewed: Peer Reviewed
• Volume: 12
• Issue: 39
• Pages: 43942-43949
• DOI: https://doi.org/10.1021/acsami.0c13057
• Keywords: Electrodes, Ceramics, Grain boundaries, Insulators, Electrical conductivity
• Public URL: http://researchrepository.napier.ac.uk/Output/2815612