Prominent energy storage density and efficiency of Na0.5Bi0.5TiO3‐based ceramics via multiscale amelioration strategy

• DOI: 10.1111/jace.19556
• Publication Date: 2023-11-16T10:49:09Z
• Authors: Zhemin Chen; Yongping Pu; Yating Ning; Yiting Hui; Chunhui Wu; Lei Zhang; Xuqing Zhang; Bo Wang
• Keywords: Power density; Pulsed Power; Thermal Stability

Abstract Eco‐friendly ceramic capacitors gradually become an important section of pulsed power devices. However, the synchronous realization ultra‐high energy storage density ( W rec > 6 J/cm 3 ) and efficiency η 90%) is difficult. Thus, a novel multiscale amelioration strategy in Na 0.5 Bi TiO ‐based ceramics proposed to achieve efficiency. The for (Na 0.47 La 0.03 0.94 Ba 0.06 (NBLBT) focuses on grain size, bandgap width, dielectric relaxor behavior, which can be regulated by introducing Sr(Al Nb 0.25 Ta )O (SANT). On one hand, refined size increased width are conducive improving breakdown strength. other optimized relaxation behavior beneficial suppress remanent polarization. Accordingly, ultrahigh = 6.89 90.1% simultaneously achieved 0.84NBLBT‐ 0.16SANT ceramic. In addition, sample synchronously possesses excellent thermal frequency stability (a variation within 5% ), transient discharge rate t 0.9 ∼ 78.8 ns high‐power P D 114.5 MW/cm . This study provides effective further develop