Novel Na0.5Bi0.5TiO3 based, lead-free energy storage ceramics with high power and energy density and excellent high-temperature stability

AbstractThe growing demand for high-power-density electric and electronic systems has encouraged the development of energy-storage capacitors with attributes such as high energy density, high capacitance density, high voltage and frequency, low weight, high-temperature operability, and environmental friendliness. Compared with their electrolytic and film counterparts, energy-storage multilayer ceramic capacitors (MLCCs) stand out for their extremely low equivalent series resistance and equivalent series inductance, high current handling capability, and high-temperature stability. These characteristics are important for applications including fast-switching third-generation wide-bandgap semiconductors in electric vehicles, 5G base stations, clean energy generation, and smart grids. There have been numerous reports on state-of-the-art MLCC energy-storage solutions. However, lead-free capacitors generally have a low-energy density, and high-energy density capacitors frequently contain lead, which is a key issue that hinders their broad application. In this review, we present perspectives and challenges for lead-free energy-storage MLCCs. Initially, the energy-storage mechanism and device characterization are introduced; then, dielectric ceramics for energy-storage applications with aspects of composition and structural optimization are summarized. Progress on state-of-the-art energy-storage MLCCs is discussed after elaboration of the fabrication process and structural design of the electrode. Emerging applications of energy-storage MLCCs are then discussed in terms of advanced pulsed power sources and high-density power converters from a theoretical and technological point of view. Finally, the challenges and future prospects for industrialization of lab-scale lead-free energy-storage MLCCs are discussed.

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Excellent Energy Storage Properties with High-Temperature Stability in Sandwich-Structured Polyimide-Based Composite Films

ACS Sustainable Chemistry & Engineering ◽

10.1021/acssuschemeng.8b04370 ◽

2018 ◽

Vol 7 (1) ◽

pp. 748-757 ◽

Cited By ~ 19

Author(s):

Qingguo Chi ◽

Zhiyou Gao ◽

Tiandong Zhang ◽

Changhai Zhang ◽

Yue Zhang ◽

...

Keyword(s):

High Temperature ◽

Energy Storage ◽

Composite Films ◽

Temperature Stability ◽

High Temperature Stability ◽

Energy Storage Properties ◽

Storage Properties

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High temperature lead-free BNT-based ceramics with stable energy storage and dielectric properties

Journal of Materials Chemistry A ◽

10.1039/c9ta10347c ◽

2020 ◽

Vol 8 (2) ◽

pp. 683-692 ◽

Cited By ~ 20

Author(s):

Chaoqiong Zhu ◽

Ziming Cai ◽

Bingcheng Luo ◽

Limin Guo ◽

Longtu Li ◽

...

Keyword(s):

High Temperature ◽

Energy Storage ◽

Dielectric Properties ◽

Temperature Stability ◽

Lead Free ◽

Capacitance Variation

The designed 0.8BNTSZ–0.2NN ceramic demonstrates superb temperature stability with a capacitance variation <±15 from −55 °C to 545 °C.

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Remarkably enhanced dielectric stability and energy storage properties in BNT—BST relaxor ceramics by A-site defect engineering for pulsed power applications

Journal of Advanced Ceramics ◽

10.1007/s40145-021-0532-8 ◽

2022 ◽

Vol 11 (2) ◽

pp. 283-294

Author(s):

Zhipeng Li ◽

Dong-Xu Li ◽

Zong-Yang Shen ◽

Xiaojun Zeng ◽

Fusheng Song ◽

...

Keyword(s):

Energy Storage ◽

Electric Field ◽

Thermal Evolution ◽

Temperature Stability ◽

Electric Polarization ◽

Pulsed Power ◽

Lead Free ◽

High Temperature Stability ◽

Defect Engineering ◽

A Site

AbstractLead-free bulk ceramics for advanced pulsed power capacitors show relatively low recoverable energy storage density (Wrec) especially at low electric field condition. To address this challenge, we propose an A-site defect engineering to optimize the electric polarization behavior by disrupting the orderly arrangement of A-site ions, in which $${\rm{B}}{{\rm{a}}_{0.105}}{\rm{N}}{{\rm{a}}_{0.325}}{\rm{S}}{{\rm{r}}_{0.245 - 1.5x}}{_{0.5x}}{\rm{B}}{{\rm{i}}_{0.325 + x}}{\rm{Ti}}{{\rm{O}}_3}$$ Ba 0.105 Na 0.325 Sr 0.245 − 1.5 x □ 0.5 x Bi 0.325 + x TiO 3 ($${\rm{BN}}{{\rm{S}}_{0.245 - 1.5x}}{_{0.5x}}{{\rm{B}}_{0.325 + x}}{\rm{T}}$$ BNS 0.245 − 1.5 x □ 0.5 x B 0.325 + x T , x = 0, 0.02, 0.04, 0.06, and 0.08) lead-free ceramics are selected as the representative. The $${\rm{BN}}{{\rm{S}}_{0.245 - 1.5x}}{_{0.5x}}{{\rm{B}}_{0.325 + x}}{\rm{T}}$$ BNS 0.245 − 1.5 x □ 0.5 x B 0.325 + x T ceramics are prepared by using pressureless solid-state sintering and achieve large Wrec (1.8 J/cm3) at a low electric field (@110 kV/cm) when x = 0.06. The value of 1.8 J/cm3 is super high as compared to all other Wrec in lead-free bulk ceramics under a relatively low electric field (< 160 kV/cm). Furthermore, a high dielectric constant of 2930 within 15% fluctuation in a wide temperature range of 40–350 °C is also obtained in $${\rm{BN}}{{\rm{S}}_{0.245 - 1.5x}}{_{0.5x}}{{\rm{B}}_{0.325 + x}}{\rm{T}}$$ BNS 0.245 − 1.5 x □ 0.5 x B 0.325 + x T (x = 0.06) ceramics. The excellent performances can be attributed to the A-site defect engineering, which can reduce remnant polarization (Pr) and improve the thermal evolution of polar nanoregions (PNRs). This work confirms that the $${\rm{BN}}{{\rm{S}}_{0.245 - 1.5x}}{_{0.5x}}{{\rm{B}}_{0.325 + x}}{\rm{T}}$$ BNS 0.245 − 1.5 x □ 0.5 x B 0.325 + x T (x = 0.06) ceramics are desirable for advanced pulsed power capacitors, and will push the development of a series of Bi0.5Na0.5TiO3 (BNT)-based ceramics with high Wrec and high-temperature stability.

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