Enhanced energy storage properties of Bi0.5Na0.5TiO3-based ceramics via regulating the doping content and sintering temperature

Chen, Yanhong; Yang, Lingxiao; Zhao, Daen; Wang, Yuesha; Zheng, Qiaoji; He, Xuemei; Lin, Dunmin

doi:10.1016/j.ceramint.2023.07.214

Cited by 4 publications

(1 citation statement)

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“…It is noteworthy that the sample consistently exhibits slender P–E loops thanks to its robust thermal stability, the decrease in W rec and η remains below 3 and 4%, respectively, throughout the tested temperature range. In Figure i, a comparison of W rec and η between KBBNTP-2T GCs and various other tungsten bronze ceramics and glass ceramics is presented. − ,− Figure S13 also shows the stability of the KBBNTP-2T GCs sample in terms of different frequencies and cycle numbers. It can be seen that this sample shows a certain degree of stability.…”

Section: Resultsmentioning

confidence: 99%

Engineering Phase Separation in Niobate Glass through Ab Initio Molecular Dynamics for Enhanced Energy Storage Performance and Unprecedented Thermal Stability in Niobate-Based Glass Ceramics

Chen,

Wang,

Zhang

et al. 2024

ACS Appl. Mater. Interfaces

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The advancement of lead-free glass ceramics (GCs) possessing appropriate energy storage characteristics is crucial for the renewable energy and electronics industry. In this study, we synthesized lead-free GCs predominantly composed of the tungsten bronze phase, Ba 3.3 Nb 10 O 28.3 . Ab initio molecular dynamics initially reveal nonuniform distribution within the Ba/Nb−O regions in niobite glassy melts, offering valuable insights for the subsequent crystallization process. The proposal of a B-site engineering strategy is suggested, which entails the concurrent reduction of grain size and augmentation of the band gap in tungsten bronze GCs doped with Ta. This approach results in a substantial enhancement of the dielectric breakdown strength (BDS). Phase-field simulations have indicated that the refinement of grain sizes plays a pivotal role in augmenting the local electric field distribution and breakdown path, thereby contributing to the enhancement of BDS. As a consequence of these modifications, a notably high recoverable energy density (W rec ) of 5.23 J/cm 3 can be achieved, accompanied by an ultrahigh efficiency (η) of 94%, and superior thermal stability in energy storage. These outcomes are particularly evident in the case of 2 mol % Ta 2 O 5 -doped P 2 O 5 −K 2 O−BaO−Bi 2 O 3 −TeO 2 − Nb 2 O 5 (PKBBTN-T) GCs, where the W rec and η can be determined to be 2.87 ± 3% J/cm 3 and 95.46 ± 4%, respectively, over a temperature range spanning from 20 to 150 °C. Additionally, this specimen exhibits an exceptionally high discharge energy density (W dis ) of 4.01 J/cm 3 . This comprehensive investigation, comprising experimental and theoretical analyses, establishes an effective pathway and paradigm for the development of dielectric materials with ultrahigh energy storage properties.

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