From core-shell Ba 0.4 Sr 0.6 TiO 3 @SiO 2 particles to dense ceramics with high energy storage performance by spark plasma sintering

Yu Hui Huang, Yong Jun Wu, Bing Liu, Tian Nan Yang, Jian Jun Wang, Juan Li, Long Qing Chen, Xiang Ming Chen

Research output: Contribution to journalArticle

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Abstract

Electrostatic capacitors with high charge/discharge speed and long cycle lifetime play an essential role in advanced electronic and electrical power systems. However, their low energy density (usually less than 1 J cm -3 ) has limited their development. In this study, core-shell structured Ba 0.4 Sr 0.6 TiO 3 @SiO 2 nanoparticles were synthesized by a wet-chemical method, and dense ceramics with enhanced energy storage density were fabricated by spark plasma sintering (SPS). In situ TEM and DSC techniques were used to investigate the interface reaction between Ba 0.4 Sr 0.6 TiO 3 and SiO 2 . The results revealed that the secondary phase ((Ba,Sr) 2 TiSi 2 O 8 ) was unavoidable, but it could be suppressed due to the low sintering temperature and short sintering period used in the SPS technique. With the increasing SiO 2 coating amount, the polarization decreased monotonously, whereas the dielectric breakdown strength increased to a maximum of 400 kV cm -1 and then decreased slightly. The enhancement in the dielectric breakdown strength was ascribed to the formation of nanosized (Ba,Sr) 2 TiSi 2 O 8 coating on Ba 0.4 Sr 0.6 TiO 3 grains, whereas the subsequent degradation of performance might have been caused by the sub-micrometric secondary phase precipitated at the grain boundaries. The effect of microstructure on the breakdown strength was further confirmed by numerical simulation using COMSOL. As a result, the Ba 0.4 Sr 0.6 TiO 3 ceramics with 8 mol% SiO 2 showed a maximum energy storage density of 1.60 J cm -3 at 400 kV cm -1 with an ultrahigh energy efficiency of 90.9%. This study opens an effective way for the design of high-performance dielectric ceramics.

Original languageEnglish (US)
Pages (from-to)4477-4484
Number of pages8
JournalJournal of Materials Chemistry A
Volume6
Issue number10
DOIs
StatePublished - Mar 14 2018

Fingerprint

Spark plasma sintering
Electric breakdown
Energy storage
Sintering
Coatings
Energy efficiency
Electrostatics
Grain boundaries
Capacitors
Polarization
Nanoparticles
Transmission electron microscopy
Degradation
Microstructure
Computer simulation
Temperature

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

Cite this

@article{d181458226164215a7c1cfd037afd7aa,
title = "From core-shell Ba 0.4 Sr 0.6 TiO 3 @SiO 2 particles to dense ceramics with high energy storage performance by spark plasma sintering",
abstract = "Electrostatic capacitors with high charge/discharge speed and long cycle lifetime play an essential role in advanced electronic and electrical power systems. However, their low energy density (usually less than 1 J cm -3 ) has limited their development. In this study, core-shell structured Ba 0.4 Sr 0.6 TiO 3 @SiO 2 nanoparticles were synthesized by a wet-chemical method, and dense ceramics with enhanced energy storage density were fabricated by spark plasma sintering (SPS). In situ TEM and DSC techniques were used to investigate the interface reaction between Ba 0.4 Sr 0.6 TiO 3 and SiO 2 . The results revealed that the secondary phase ((Ba,Sr) 2 TiSi 2 O 8 ) was unavoidable, but it could be suppressed due to the low sintering temperature and short sintering period used in the SPS technique. With the increasing SiO 2 coating amount, the polarization decreased monotonously, whereas the dielectric breakdown strength increased to a maximum of 400 kV cm -1 and then decreased slightly. The enhancement in the dielectric breakdown strength was ascribed to the formation of nanosized (Ba,Sr) 2 TiSi 2 O 8 coating on Ba 0.4 Sr 0.6 TiO 3 grains, whereas the subsequent degradation of performance might have been caused by the sub-micrometric secondary phase precipitated at the grain boundaries. The effect of microstructure on the breakdown strength was further confirmed by numerical simulation using COMSOL. As a result, the Ba 0.4 Sr 0.6 TiO 3 ceramics with 8 mol{\%} SiO 2 showed a maximum energy storage density of 1.60 J cm -3 at 400 kV cm -1 with an ultrahigh energy efficiency of 90.9{\%}. This study opens an effective way for the design of high-performance dielectric ceramics.",
author = "Huang, {Yu Hui} and Wu, {Yong Jun} and Bing Liu and Yang, {Tian Nan} and Wang, {Jian Jun} and Juan Li and Chen, {Long Qing} and Chen, {Xiang Ming}",
year = "2018",
month = "3",
day = "14",
doi = "10.1039/c7ta10821d",
language = "English (US)",
volume = "6",
pages = "4477--4484",
journal = "Journal of Materials Chemistry A",
issn = "2050-7488",
publisher = "Royal Society of Chemistry",
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From core-shell Ba 0.4 Sr 0.6 TiO 3 @SiO 2 particles to dense ceramics with high energy storage performance by spark plasma sintering . / Huang, Yu Hui; Wu, Yong Jun; Liu, Bing; Yang, Tian Nan; Wang, Jian Jun; Li, Juan; Chen, Long Qing; Chen, Xiang Ming.

In: Journal of Materials Chemistry A, Vol. 6, No. 10, 14.03.2018, p. 4477-4484.

Research output: Contribution to journalArticle

TY - JOUR

T1 - From core-shell Ba 0.4 Sr 0.6 TiO 3 @SiO 2 particles to dense ceramics with high energy storage performance by spark plasma sintering

AU - Huang, Yu Hui

AU - Wu, Yong Jun

AU - Liu, Bing

AU - Yang, Tian Nan

AU - Wang, Jian Jun

AU - Li, Juan

AU - Chen, Long Qing

AU - Chen, Xiang Ming

PY - 2018/3/14

Y1 - 2018/3/14

N2 - Electrostatic capacitors with high charge/discharge speed and long cycle lifetime play an essential role in advanced electronic and electrical power systems. However, their low energy density (usually less than 1 J cm -3 ) has limited their development. In this study, core-shell structured Ba 0.4 Sr 0.6 TiO 3 @SiO 2 nanoparticles were synthesized by a wet-chemical method, and dense ceramics with enhanced energy storage density were fabricated by spark plasma sintering (SPS). In situ TEM and DSC techniques were used to investigate the interface reaction between Ba 0.4 Sr 0.6 TiO 3 and SiO 2 . The results revealed that the secondary phase ((Ba,Sr) 2 TiSi 2 O 8 ) was unavoidable, but it could be suppressed due to the low sintering temperature and short sintering period used in the SPS technique. With the increasing SiO 2 coating amount, the polarization decreased monotonously, whereas the dielectric breakdown strength increased to a maximum of 400 kV cm -1 and then decreased slightly. The enhancement in the dielectric breakdown strength was ascribed to the formation of nanosized (Ba,Sr) 2 TiSi 2 O 8 coating on Ba 0.4 Sr 0.6 TiO 3 grains, whereas the subsequent degradation of performance might have been caused by the sub-micrometric secondary phase precipitated at the grain boundaries. The effect of microstructure on the breakdown strength was further confirmed by numerical simulation using COMSOL. As a result, the Ba 0.4 Sr 0.6 TiO 3 ceramics with 8 mol% SiO 2 showed a maximum energy storage density of 1.60 J cm -3 at 400 kV cm -1 with an ultrahigh energy efficiency of 90.9%. This study opens an effective way for the design of high-performance dielectric ceramics.

AB - Electrostatic capacitors with high charge/discharge speed and long cycle lifetime play an essential role in advanced electronic and electrical power systems. However, their low energy density (usually less than 1 J cm -3 ) has limited their development. In this study, core-shell structured Ba 0.4 Sr 0.6 TiO 3 @SiO 2 nanoparticles were synthesized by a wet-chemical method, and dense ceramics with enhanced energy storage density were fabricated by spark plasma sintering (SPS). In situ TEM and DSC techniques were used to investigate the interface reaction between Ba 0.4 Sr 0.6 TiO 3 and SiO 2 . The results revealed that the secondary phase ((Ba,Sr) 2 TiSi 2 O 8 ) was unavoidable, but it could be suppressed due to the low sintering temperature and short sintering period used in the SPS technique. With the increasing SiO 2 coating amount, the polarization decreased monotonously, whereas the dielectric breakdown strength increased to a maximum of 400 kV cm -1 and then decreased slightly. The enhancement in the dielectric breakdown strength was ascribed to the formation of nanosized (Ba,Sr) 2 TiSi 2 O 8 coating on Ba 0.4 Sr 0.6 TiO 3 grains, whereas the subsequent degradation of performance might have been caused by the sub-micrometric secondary phase precipitated at the grain boundaries. The effect of microstructure on the breakdown strength was further confirmed by numerical simulation using COMSOL. As a result, the Ba 0.4 Sr 0.6 TiO 3 ceramics with 8 mol% SiO 2 showed a maximum energy storage density of 1.60 J cm -3 at 400 kV cm -1 with an ultrahigh energy efficiency of 90.9%. This study opens an effective way for the design of high-performance dielectric ceramics.

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