Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy
Based on the B-site modification strategy, excellent energy storage properties were achieved in this work by substituting Nb with Ta of the same valence in niobate-based glass ceramics. Ta substitution was found to lead to the transformation of crystal structures, and the space point group evolved f...
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2025-05-01
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| author | Kexin Gao Fei Shang Yaoyi Qin Guohua Chen |
| author_facet | Kexin Gao Fei Shang Yaoyi Qin Guohua Chen |
| author_sort | Kexin Gao |
| collection | DOAJ |
| description | Based on the B-site modification strategy, excellent energy storage properties were achieved in this work by substituting Nb with Ta of the same valence in niobate-based glass ceramics. Ta substitution was found to lead to the transformation of crystal structures, and the space point group evolved from the non-centrosymmetric P4bm to the centrosymmetric P4/mbm, resulting in a transition from relaxor ferroelectric to paraelectric glass ceramics. Furthermore, the addition of Ta led to a significant decrease in grain size and interfacial activation energy, as well as an increase in the optical band gap, resulting in a dramatic increase in BDS from 800 kV/cm to 1300 kV/cm. The KBSN-4.0mol%Ta<sub>2</sub>O<sub>5</sub> glass ceramic exhibited optimal energy storage properties, including a discharge energy density of ~5.62 J/cm<sup>3</sup> and a superfast discharge rate of ~9.7 ns, resulting in an ultrahigh discharge power density of about ~1296.9 MW/cm<sup>3</sup> at 1300 kV/cm. Furthermore, this KBSN-Ta glass ceramic also displayed good thermal stability over a temperature range of 20–120 °C, with the <i>W<sub>d</sub></i> decreasing by 9.0% at 600 kV/cm. B-site modification engineering in glass ceramics has proved to be an important way to effectively optimize energy storage performance. |
| format | Article |
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| institution | OA Journals |
| issn | 2073-4352 |
| language | English |
| publishDate | 2025-05-01 |
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| spelling | doaj-art-dd02c6effb1d45e8a245a3382fd95e4e2025-08-20T01:56:31ZengMDPI AGCrystals2073-43522025-05-0115544410.3390/cryst15050444Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution StrategyKexin Gao0Fei Shang1Yaoyi Qin2Guohua Chen3Electronical Information Materials and Devices Engineering Research Center of Ministry of Education, Guangxi Key Laboratory of Information Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaElectronical Information Materials and Devices Engineering Research Center of Ministry of Education, Guangxi Key Laboratory of Information Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaElectronical Information Materials and Devices Engineering Research Center of Ministry of Education, Guangxi Key Laboratory of Information Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaElectronical Information Materials and Devices Engineering Research Center of Ministry of Education, Guangxi Key Laboratory of Information Materials, School of Material Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, ChinaBased on the B-site modification strategy, excellent energy storage properties were achieved in this work by substituting Nb with Ta of the same valence in niobate-based glass ceramics. Ta substitution was found to lead to the transformation of crystal structures, and the space point group evolved from the non-centrosymmetric P4bm to the centrosymmetric P4/mbm, resulting in a transition from relaxor ferroelectric to paraelectric glass ceramics. Furthermore, the addition of Ta led to a significant decrease in grain size and interfacial activation energy, as well as an increase in the optical band gap, resulting in a dramatic increase in BDS from 800 kV/cm to 1300 kV/cm. The KBSN-4.0mol%Ta<sub>2</sub>O<sub>5</sub> glass ceramic exhibited optimal energy storage properties, including a discharge energy density of ~5.62 J/cm<sup>3</sup> and a superfast discharge rate of ~9.7 ns, resulting in an ultrahigh discharge power density of about ~1296.9 MW/cm<sup>3</sup> at 1300 kV/cm. Furthermore, this KBSN-Ta glass ceramic also displayed good thermal stability over a temperature range of 20–120 °C, with the <i>W<sub>d</sub></i> decreasing by 9.0% at 600 kV/cm. B-site modification engineering in glass ceramics has proved to be an important way to effectively optimize energy storage performance.https://www.mdpi.com/2073-4352/15/5/444glass ceramicdielectric energy storageenergy densitypower densityB-site modification |
| spellingShingle | Kexin Gao Fei Shang Yaoyi Qin Guohua Chen Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy Crystals glass ceramic dielectric energy storage energy density power density B-site modification |
| title | Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy |
| title_full | Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy |
| title_fullStr | Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy |
| title_full_unstemmed | Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy |
| title_short | Optimized Breakdown Strength and Crystal Structure for Boosting the Energy Storage Performance of Niobate-Based Glass Ceramics via a B-Site Substitution Strategy |
| title_sort | optimized breakdown strength and crystal structure for boosting the energy storage performance of niobate based glass ceramics via a b site substitution strategy |
| topic | glass ceramic dielectric energy storage energy density power density B-site modification |
| url | https://www.mdpi.com/2073-4352/15/5/444 |
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