Achieving ultrahigh discharge energy and power density in niobate-based glass ceramics <i>via</i> A-site substitution modulation during crystallization

Qin, Yaoyi; Shang, Fei; Chen, Guohua; Xu, Jiwen; Wang, Yi; Li, Zhenchun; Zhai, Jiwei

doi:10.1039/d2ta02094g

Cited by 16 publications

(13 citation statements)

References 48 publications

(55 reference statements)

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“…Discharge time (t 0.9 ) is the time it takes for 90% of the stored energy to be released. 41 We can see that the trilayer film releases 0.357 J/ cm 3 of stored energy in an extremely short time (1.02 μs), which results in an ultrahigh power density of 0.35 MW/cm 3 , approximately 393% that of the commercial BOPP film.…”

Section: Resultsmentioning

confidence: 88%

“…For the charge/discharge test, the samples are charged with an electric field of 100 kV/mm and then the discharge is carried out across a 10 kΩ load resistor. Discharge time ( t 0.9 ) is the time it takes for 90% of the stored energy to be released . We can see that the trilayer film releases 0.357 J/cm 3 of stored energy in an extremely short time (1.02 μs), which results in an ultrahigh power density of 0.35 MW/cm 3 , approximately 393% that of the commercial BOPP film.…”

Section: Resultsmentioning

confidence: 94%

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Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Xia

Chen

Yan

et al. 2022

ACS Appl. Electron. Mater.

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Polymer dielectric composites are extensively used in modern electronic devices because of their extremely high power density. However, unfavorable coupling between breakdown strength and dielectric permittivity can make achieving high energy density a challenge. In this study, reduced graphene oxide @ barium titanate (RGO@BTO) hybrid nanosheets have been fabricated and utilized as fillers in the design of RGO@BTO/P(VDF-HFP) single-layer films. An increase in permittivity to 24.8@10 kHz, i.e., equivalent to 253% of the P(VDF-HFP) (∼9.8@10 kHz) matrix, has been achieved with only 1 wt % RGO@BTO nanofillers due to the formation of microcapacitors. Furthermore, the RGO@BTO/P(VDF-HFP) film is hot-pressed with a PEI film and a P(VDF-HFP) film, forming a trilayer structure. Consequently, this trilayer film displays a high breakdown strength of 478 kV/mm, a high energy density of 8.25 J/cm 3 , and a satisfactory efficiency of 64.3%. Thus, this study provides an efficient route for designing polymer composites that combine high energy density with high permittivity.

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Section: Resultsmentioning

confidence: 88%

Section: Resultsmentioning

confidence: 94%

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Xia

Chen

Yan

et al. 2022

ACS Appl. Electron. Mater.

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“…Dielectric capacitors are widely used as indispensable passive components in modern power electronics and electrical systems. A wide range of dielectric materials based on polymers, − glasses, − ceramics, − glass-ceramics, − and composites − have been studied extensively to develop dielectric capacitors exhibiting both a high power density and a high energy density. Dielectric capacitors store energy based on electrostatic charge without involving electrochemical reactions or mass transport that is required in rechargeable batteries and fuel cells.…”

Section: Introductionmentioning

confidence: 99%

“…Such high potentials have led to studies of the development of glass-ceramics for dielectric capacitors with high power and energy densities. Nevertheless, the energy density under charge–discharge test conditions for most glass-ceramics reported in the literature is still <1 J/cm 3 . − …”

Section: Introductionmentioning

confidence: 99%

Glass-Ceramic Capacitors with Simultaneously High Power and Energy Densities under Practical Charge–Discharge Conditions

Shang

Wei

et al. 2022

ACS Appl. Mater. Interfaces

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Developing dielectric capacitors with both a high power density and a high energy density for application in power electronics has been a long-standing challenge. Glass-ceramics offer the potential of retaining the high relative permittivity of ceramics and at the same time of exhibiting the high dielectric breakdown strength and fast charge/discharge rate of glasses, thus producing concurrently high power and energy densities in a single material. In this work, glass-ceramics are fabricated to achieve simultaneously high power and energy densities, high efficiency, and thermal stability by tuning the glass crystallization process via a suitable nucleating agent and a high oxygen partial pressure. Under the same practical charge−discharge test conditions, the asprepared glass-ceramics combine the high energy density of ceramics and ultrafast discharge rate of glasses, producing the highest power density among glass-and ceramic-based dielectric materials. This work demonstrates the significant potential of achieving both high power and energy densities in glass-ceramics by optimizing the glass crystallization process.

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“…Moreover, for polymer composites, the low permittivity and poor thermal stability also limit their wide applications 12 . However, glass–ceramics can combine the advantages of both ceramic and glass, such as high applied electric field, moderate dielectric constant, ultrafast charge/discharge time, and great temperature stability, due to controllable crystallization from amorphous glass matrix 13–15 . Therefore, it is hopeful to realize high power and energy storage density in the dielectric capacitor of glass–ceramics simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Influences of crystallization temperature on the structure, dielectric, and energy storage characteristics of KBaSrNb₅O₁₅‐based glass–ceramics

et al. 2022

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Glass-ceramics capacitors have great application potential in pulsed power systems, due to ultrafast discharge speed and high dielectric breakdown strength (BDS). Here, lead-free niobate glass-ceramic dielectric materials were synthesized, and the effects of heat treatment temperature on the dielectric, ferroelectric, and energy storage properties of glass-ceramics were investigated comprehensively. The results exhibit that the dielectric permittivity first increases and then decreases as the crystallinity increases; however, the dielectric BDS diminishes. At the optimum crystallization temperature of 740 • C, the maximum value of discharge energy density is 2.2 J/cm 3 at 600 kV/cm, which is about 7.6 times that of mother glass. Furthermore, an ultrahigh power density of about 380.9 MW/cm 3 and ultrafast discharge speed of about 11.2 ns were achieved simultaneously. Meanwhile, great thermal stability of charge-discharge property was verified in this glass-ceramics. According to P-E loops and dielectric test result, a high dielectric constant (∼207) and low dielectric loss (<0.005) as well as high energy storage efficiency of about 94.9% were achieved for G740 sample. The previous results make the obtained glass-ceramic as potential candidates in dielectric capacitors.

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Achieving ultrahigh discharge energy and power density in niobate-based glass ceramics via A-site substitution modulation during crystallization

Abstract: High discharge power density and energy density are the key to the application of dielectric capacitors in pulsed power systems. Glass ceramics, exhibiting the high dielectric breakdown strength and fast...

Cited by 16 publications

References 48 publications

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Glass-Ceramic Capacitors with Simultaneously High Power and Energy Densities under Practical Charge–Discharge Conditions

Influences of crystallization temperature on the structure, dielectric, and energy storage characteristics of KBaSrNb₅O₁₅‐based glass–ceramics

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Achieving ultrahigh discharge energy and power density in niobate-based glass ceramics via A-site substitution modulation during crystallization

Abstract: High discharge power density and energy density are the key to the application of dielectric capacitors in pulsed power systems. Glass ceramics, exhibiting the high dielectric breakdown strength and fast...

Cited by 16 publications

References 48 publications

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Improved Dielectric Permittivity and Energy Density of Layered Polymer Composites through the Incorporation of Ultralow Amounts of RGO@BTO Hybrid Nanosheets

Glass-Ceramic Capacitors with Simultaneously High Power and Energy Densities under Practical Charge–Discharge Conditions

Influences of crystallization temperature on the structure, dielectric, and energy storage characteristics of KBaSrNb5O15‐based glass–ceramics

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Influences of crystallization temperature on the structure, dielectric, and energy storage characteristics of KBaSrNb₅O₁₅‐based glass–ceramics