Simultaneously achieved high energy-storage and superior charge–discharge performance in K0.5Bi0.5TiO3-based lead-free ceramics by A-site defect engineering

Chen, Pengfei; Li, Tianyu; Cao, Wanlu; Cheng, Chao; Wang, Chunchang

doi:10.1007/s10854-021-05840-7

Cited by 11 publications

(3 citation statements)

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“…(m) ε r of BKTBFO- x NSN ceramics as a function of temperature at 10 kHz. (n) Comparison of Δε/ε150 °C for different materials. ,,− …”

Section: Resultsmentioning

confidence: 99%

“…For example, Chen et al prepared pure BKT ceramic and obtained a P max of only 41 μC/cm 2 at the highest electric field. 17 Li et al successfully synthesized Ba(Mg 1/3 Nb 2/3 )O 3 modified BKT ceramic with a low P max of 28 μC/cm 2 . 18 Based on this, the recently investigated BKTbased ceramics exhibit poor energy storage properties (P max < 40 μC/cm 2 , W rec < 3 J/cm 3 , η < 70% and BDS <300 kV/ cm).…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, due to the volatilization of Bi and K, it is difficult to prepare BKT-based ceramics with high P max . For example, Chen et al prepared pure BKT ceramic and obtained a P max of only 41 μC/cm 2 at the highest electric field . Li et al successfully synthesized Ba(Mg 1/3 Nb 2/3 )O 3 modified BKT ceramic with a low P max of 28 μC/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

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Significantly Enhanced Energy Storage Performance in High Hardness BKT-Based Ceramic via Defect Engineering and Relaxor Tuning

Wang

Wei

et al. 2022

ACS Appl. Mater. Interfaces

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Hybrid electric cars and pulsed power technologies have increased the demand for capacitors with high energy density, wide temperature stability, high operating voltage, and good mechanical qualities. In this work, (1 − x) (0.6Bi 0.5 K 0.5 TiO 3 -0.4BiFeO 3 )-x(Na 0.4 Sm 0.2 NbO 3 ) ((1 − x) (BKTBF)-xNSN) relaxor ceramics were prepared by constructing morphotropic phase boundary (MPB) combined with oxygen vacancy defect engineering. It is worth noting that the 0.6BKT-0.4BFO ceramics at MPB have a high P max ∼ 60 μC/cm 2 . The ultra-hard (H V = 10.7 GPa) BKTBFO-0.16NSN relaxor ferroelectric ceramic achieves a high W rec of 6.52 J/cm 3 , a working temperature of 20−120 °C, and a working frequency of 1−1000 Hz. Additionally, the BKTBFO-0.16NSN ceramic demonstrates comprehensive pulse charge−discharge performance (I max = 17.2 A, C D = 546.7 A/cm 2 , P D = 54.7 MW/cm 3 , and t 0.9 = 59 ns) and excellent stability (25−125 °C and 10 4 charge−discharge cycles). This study offers a novel approach for the practical implementation of high-performance pulse capacitors, which will undoubtedly stimulate further research and development of high-P max energy storage dielectrics (such as BNT, BKT, and BFO).

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“…(m) ε r of BKTBFO- x NSN ceramics as a function of temperature at 10 kHz. (n) Comparison of Δε/ε150 °C for different materials. ,,− …”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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