Improved breakdown strength and energy storage density of a Ce doped strontium titanate core by silica shell coating

Qi, Junlei; Cao, Minghe; Heath, James P.; Dean, J.; Hao, Hua; Yao, Zhonghua; Yu, Zhiyong; Liu, Hanxing

doi:10.1039/c8tc03181a

Cited by 57 publications

(10 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For K 0.5 Na 0.5 NbO 3 –Bi(Mg 2/3 Nb 1/3 )O 3 (KNN–BMN), small amounts of CuO help densify ceramics through the formation of a transient liquid phase, as reported by Qu and co-workers ( Figure 5 ). 64 The sintering temperature was also reduced from 1150 to 930 °C, allowing compatibly with Cu or Ag/Pd internal electrode in MLs and giving rise to W rec ∼ 4.02 J cm –3 at 400 kV cm –1 for 0.9KNN-0.1BMN with 1% mol CuO. 66 …”

Section: Principles Of Energy Storage In Electroceramicsmentioning

confidence: 99%

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

et al. 2021

View full text Add to dashboard Cite

Materials exhibiting high energy/power density are currently needed to meet the growing demand of portable electronics, electric vehicles and large-scale energy storage devices. The highest energy densities are achieved for fuel cells, batteries, and supercapacitors, but conventional dielectric capacitors are receiving increased attention for pulsed power applications due to their high power density and their fast charge–discharge speed. The key to high energy density in dielectric capacitors is a large maximum but small remanent (zero in the case of linear dielectrics) polarization and a high electric breakdown strength. Polymer dielectric capacitors offer high power/energy density for applications at room temperature, but above 100 °C they are unreliable and suffer from dielectric breakdown. For high-temperature applications, therefore, dielectric ceramics are the only feasible alternative. Lead-based ceramics such as La-doped lead zirconate titanate exhibit good energy storage properties, but their toxicity raises concern over their use in consumer applications, where capacitors are exclusively lead free. Lead-free compositions with superior power density are thus required. In this paper, we introduce the fundamental principles of energy storage in dielectrics. We discuss key factors to improve energy storage properties such as the control of local structure, phase assemblage, dielectric layer thickness, microstructure, conductivity, and electrical homogeneity through the choice of base systems, dopants, and alloying additions, followed by a comprehensive review of the state-of-the-art. Finally, we comment on the future requirements for new materials in high power/energy density capacitor applications.

show abstract

Section: Principles Of Energy Storage In Electroceramicsmentioning

confidence: 99%

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

et al. 2021

View full text Add to dashboard Cite

show abstract

“…With the depletion of fossil fuels, − scientists have never stop developing renewable and eco-friendly energy sources that can replace the conventional polluting energy sources. , Electrochemical capacitors (also known as supercapacitors), which can accommodate well with these intermittent energy sources, have attracted considerable attention among researchers. , Compared with traditional energy devices, supercapacitors possess prominent merits including fast recharging ability and high power density, which can satisfy the ever developing demands for electric vehicles. Theoretically, one trait of supercapacitors lies in that they stabilize over an extremely long lifespan even at a high charging/discharging rate with negligible volume change .…”

Section: Introductionmentioning

confidence: 99%

NiCo₂S₄ Nanotubes Anchored 3D Nitrogen-Doped Graphene Framework as Electrode Material with Enhanced Performance for Asymmetric Supercapacitors

Chen

Liu

Zhang

et al. 2019

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

NiCo2S4 is considered as a promising candidate for high-performance supercapacitors as it stores energy through fast surface redox reactions. However, it suffers from severe aggregation which deteriorates their stability. Herein, uniformly distributed NiCo2S4 nanotubes anchored on a 3D ultrathin nitrogen (N)-doped graphene framework (NGF) are obtained via a facile hydrothermal method, followed by a sulfurization process. The NGF composed of conductive three-dimensional graphene scaffolds can not only ensure even distribution of NiCo2S4 but also facilitate electron transport. Meanwhile, NiCo2S4 nanotubes with hollow structures can shorten the diffusion pathway of electrolyte ions. The strong synergistic effect between NiCo2S4 nanotubes and the NGF substrate helps to obtain satisfactory electrochemical properties. Accordingly, the as-prepared NiCo2S4/NGF composite exhibits a specific capacitance of 1240 F g–1 (558 C g–1) at 1 A g–1, almost 2-fold of its counterpart NiCo2S4 (688.9 F g–1/310 C g–1). Moreover, the corresponding hybrid energy device (NiCo2S4/NGF\\AC) demonstrates a superb energy density of 36.8 Wh kg–1 and outstanding cycling stability. This admirable design of the NiCo2S4/NGF composite holds great promise as an electrode material in supercapacitor application.

show abstract

“…With a high degree of hydrolysis, 99.8−100% (mol/mol), poly(vinyl alcohol) (PVA) holds a bright potential as a binder for dielectric ceramics by preparing a 5 wt % solution in 95 wt % deionized water. 24 The concentration was stirred for 2−4 h and kept at 95 °C temperature to obtain a soluble binder. The slurry of the final formulated batch (0.9BTC x −0.1BA) was oven-dried at 100 °C for 72 h; afterward, the ceramic powders were reground with 1.5 drops/g PVA-binder.…”

Section: Methodsmentioning

confidence: 99%

“…With a high degree of hydrolysis, 99.8–100% (mol/mol), poly(vinyl alcohol) (PVA) holds a bright potential as a binder for dielectric ceramics by preparing a 5 wt % solution in 95 wt % deionized water . The concentration was stirred for 2–4 h and kept at 95 °C temperature to obtain a soluble binder.…”

Section: Experimental Sectionmentioning

confidence: 99%

A Unique Mechanism for Dielectric-Temperature Stability of BaTiO₃-Based Ceramics Using Ba(OH)₂/TiO₂ Suspension

et al. 2020

Self Cite

View full text Add to dashboard Cite

A comparison between poly(vinyl alcohol) (PVA)-formed (TYPE-I), Ba(OH) 2 /TiO 2 [Ba/Ti] suspension-formed (TYPE-II), and cold isostatic pressed (CIP) pellets (TYPE-II+CIP) of 0.9BaTi 1−x Ca x O 3-x − 0.1BiAlO 3 (x = 0.005−0.03) was investigated. The nominal composition of BiAlO 3 was kept constant at a limit of 0.1 in order to resolve the effect of Casubstitution to the Ti-site. The experimental interpretations of the processing structure−property relationship explicitly support the effectiveness of Ba-(OH) 2 /TiO 2 suspension, as expounded by efficient characterizations with regard to the thermal properties, phase structures, density developments, dielectric properties, microstructure progressions, and impedance analysis response to temperature. Thus, we present XRD analyses and SEM and TEM images that relate the basic underlying dielectric-temperature stability mechanism to the evolutionary dynamics of B-site substitution and core− shell morphology in a densified microstructure (TYPE-II: 5.723−5.919 g/cm 3 , TYPE-II+CIP: 5.784−5.938 g/cm 3 ) of a submicrometer grain size (TYPE-II: 0.32−0.8 μm, TYPE-II+CIP: 0.23−0.71 μm). Apart from enhancing low-temperature sintering, this is the first time a Ba(OH) 2 /TiO 2 precursor suspension has been incorporated as a unique mechanism to effect a wide-range X8R dielectric material.

show abstract

Improved breakdown strength and energy storage density of a Ce doped strontium titanate core by silica shell coating

Abstract: Improved breakdown strength and energy storage density of a core–shell structure with a high permittivity core and a highly insulating shell.

Cited by 57 publications

References 43 publications

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

NiCo₂S₄ Nanotubes Anchored 3D Nitrogen-Doped Graphene Framework as Electrode Material with Enhanced Performance for Asymmetric Supercapacitors

A Unique Mechanism for Dielectric-Temperature Stability of BaTiO₃-Based Ceramics Using Ba(OH)₂/TiO₂ Suspension

Contact Info

Product

Resources

About

Improved breakdown strength and energy storage density of a Ce doped strontium titanate core by silica shell coating

Abstract: Improved breakdown strength and energy storage density of a core–shell structure with a high permittivity core and a highly insulating shell.

Cited by 57 publications

References 43 publications

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

Electroceramics for High-Energy Density Capacitors: Current Status and Future Perspectives

NiCo2S4 Nanotubes Anchored 3D Nitrogen-Doped Graphene Framework as Electrode Material with Enhanced Performance for Asymmetric Supercapacitors

A Unique Mechanism for Dielectric-Temperature Stability of BaTiO3-Based Ceramics Using Ba(OH)2/TiO2 Suspension

Contact Info

Product

Resources

About

NiCo₂S₄ Nanotubes Anchored 3D Nitrogen-Doped Graphene Framework as Electrode Material with Enhanced Performance for Asymmetric Supercapacitors

A Unique Mechanism for Dielectric-Temperature Stability of BaTiO₃-Based Ceramics Using Ba(OH)₂/TiO₂ Suspension