Back to Search
Start Over
Enhancing energy storage performance in Na0.5Bi0.5TiO3-based lead-free relaxor ferroelectric ceramics along a stepwise optimization route.
- Source :
- Journal of Materials Chemistry A; 2/14/2023, Vol. 11 Issue 6, p2641-2651, 11p
- Publication Year :
- 2023
-
Abstract
- Despite the fact that relaxor ferroelectrics (RFEs) have been extensively researched because of their various advantages, there are still barriers to simultaneously increasing their energy storage density (W<subscript>rec</subscript>) and efficiency (η). By substituting Bi(Mg<subscript>0.5</subscript>Sn<subscript>0.5</subscript>)O<subscript>3</subscript> (BMS) and optimizing the formation process, this study follows a stepwise optimization route to achieve comprehensive exceptional energy storage performance (ESP) in Na<subscript>0.5</subscript>Bi<subscript>0.5</subscript>TiO<subscript>3</subscript>-Sr<subscript>0.85</subscript>Bi<subscript>0.1</subscript>TiO<subscript>3</subscript> (NBT-SBT)-based ceramics. On the premise of constructing a Sr<superscript>2+</superscript>–Sr<superscript>2+</superscript> ion pair at the A-site to ensure a large polarization, the introduction of Mg<superscript>2+</superscript> and Sn<superscript>4+</superscript> ions at the B-site further induces a local disordered field and promotes polar nanoregions. Following that, the viscous polymer process (VPP) used to synthesize NBT-SBT-BMS ceramics can thin the thickness, reduce defects, and boost compactness, hence improving the polarization difference (ΔP) and breakdown strength (E<subscript>b</subscript>). Using the stepwise optimization route, we were able to attain a high ΔP of 64.6 μC cm<superscript>−2</superscript> and an E<subscript>b</subscript> of 440 kV cm<superscript>−1</superscript> in 0.92(0.65NBT-0.35SBT)-0.08BMS-VPP ceramics. More crucially, an ultrahigh W<subscript>rec</subscript> of 7.5 J cm<superscript>−3</superscript> and a high η of 85% are simultaneously achieved, together with excellent temperature adaptability between 20 and 120 °C. Our superb ESP exceeds the majority of previously reported NBT-based ceramics, confirming the applicability of this stepwise optimization route to other similar high-performance dielectric ceramic designs. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 20507488
- Volume :
- 11
- Issue :
- 6
- Database :
- Complementary Index
- Journal :
- Journal of Materials Chemistry A
- Publication Type :
- Academic Journal
- Accession number :
- 161762204
- Full Text :
- https://doi.org/10.1039/d2ta09395b