CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Renzhong Xue,Xiaosong Liu,Xiang Zhu,Tao Li,Haiyang Dai,Jing Chen
It is always a challenging problem to simultaneously obtain a large dielectric constant ( ɛ ′), low dielectric loss (tan δ ), and good nonlinear performance in the ACu 3 Ti 4 O 12 (ACTO) ceramic family. In this study, Y 3+ -doped Bi 2/3 Cu 3 Ti 4 O 12 ceramics with a giant ɛ ′, low tan δ , high breakdown field strength ( E b ), and high nonlinearity coefficient ( α ) were successfully prepared via the solid-state method. The (Bi 0.5 Y 0.5 ) 2/3 Cu 3 Ti 4 O 12 ceramic exhibited a huge ɛ ′ (∼12660), very small tan δ (∼0.019), high E b (∼15.7 kV/cm), high α (∼7.61), and high energy storage density (∼140.2 mJ/cm 3 ). The impedance spectra and electrical modulus results show that the dielectric properties of the prepared ceramics follow the internal barrier layer capacitor model. The enhanced tan δ and improved nonlinear properties of the doped samples are associated with the increased grain boundary resistance and Schottky barrier. These results provide important clues and valuable insights for realizing bifunctional ACTO materials with a giant ɛ ′, low tan δ , and excellent nonlinear properties.
研究领域:
材料科学
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电子材料
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Yu Huifen,Hu Tengfei,Wang Haoyu,Qi He,Wu Jie,Zhang Ruonan,Fang Weisan,Shi Xiaoming,Fu Zhengqian,Chen Liang,Chen Jun
Relaxor antiferroelectrics are considered promising candidate materials for achieving excellent energy storage capabilities. However, the trade-off between high recoverable energy density and high efficiency remains a major challenge in relaxor antiferroelectrics for practical applications. Herein, guided by phase-field simulation, we propose a strategy of designing polymorphic heterogeneous shell in core-shell dual-phase dielectrics to synergistically control micro and local heterostructures, resulting in comprehensive improvements in breakdown electric field, polarization fluctuation and saturation behaviors. Leveraging the core-shell effect and polarization heterogeneity, an ultrahigh recoverable energy density of 12.7 J cm -3 and an impressive efficiency of 87.2% are achieved in lead-free relaxor antiferroelectrics, making a performance breakthrough in core-shell dielectrics. This work opens up a new avenue to efficiently develop high-performance energy storage dielectrics and is expected to be popularized in other fields.
研究领域:
材料科学
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介电物理
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功能陶瓷
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能源存储
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相场模拟
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Mingge Zhu,Xiaopei Zhu,Mengdi Zhang,Hangjian Wang,Wenjing Qiao,Yangfei Gao,Ruirui Kang,Mei Bai,Junwen Mei,Na Tian,Caiyin You,Xiaojie Lou
Lead-free ferroelectric ceramics show promising applications in environmentally friendly optoelectronic devices, yet conventional Bi 0.5 Na 0.5 TiO 3 -based materials face challenges in achieving balanced enhancement of energy storage density and photoluminescence properties. In this study, the influence mechanism of the structural evolution of Bi 0.5 Na 0.5 TiO 3 -based ceramics on their energy storage and photoluminescence properties was systematically studied. It was found that the doping of BaTiO 3 and SrTiO 3 caused local structural distortion and oxygen octahedral tilt, and the introduction of larger radius ions in A-site significantly refined grain size and improved breakdown electric field, endowing 0.75Bi (703/1500) Dy (47/1500) Na 0.5 TiO 3 -0.25BaTiO 3 with a high recoverable energy density of 3.73 J/cm 3 and an outstanding efficiency of 85.62 % under 350 kV/cm, while 0.75Bi (703/1500) Dy (47/1500) Na 0.5 TiO 3 -0.25SrTiO 3 exhibited strong photoluminescence properties, suggesting its potential as a yellow-green phosphor for warm white LEDs. Besides, SrTiO 3 doping enhanced crystal field symmetry to suppress thermal quenching via reduced phonon coupling, simultaneously improving Dy 3+ 6 H 15/2 → 4 I 13/2 transitions through optimized parity-forbidden relaxation. These findings elucidate the pivotal role of structural engineering strategies in tailoring the energy storage and photoluminescence properties of Bi 0.5 Na 0.5 TiO 3 ceramics, thereby will be beneficial for advancing the development of high-performance multifunctional dielectric capacitors.
研究领域:
材料科学
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铁电性
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光电子学
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固体物理学
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陶瓷工程
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-8
·
IF 17.694
Chen Liang,Deng Shiqing,Liu Hui,Wu Jie,Qi He,Chen Jun
Next-generation advanced high/pulsed power capacitors rely heavily on dielectric ceramics with high energy storage performance. However, thus far, the huge challenge of realizing ultrahigh recoverable energy storage density ( W rec ) accompanied by ultrahigh efficiency ( η ) still existed and has become a key bottleneck restricting the development of dielectric materials in cutting-edge energy storage applications. Here, we propose a high-entropy strategy to design “local polymorphic distortion” including rhombohedral-orthorhombic-tetragonal-cubic multiphase nanoclusters and random oxygen octahedral tilt, resulting in ultrasmall polar nanoregions, an enhanced breakdown electric field, and delayed polarization saturation. A giant W rec ~10.06 J cm −3 is realized in lead-free relaxor ferroelectrics, especially with an ultrahigh η ~90.8%, showing breakthrough progress in the comprehensive energy storage performance for lead-free bulk ceramics. This work opens up an effective avenue to design dielectric materials with ultrahigh comprehensive energy storage performance to meet the demanding requirements of advanced energy storage applications.
研究领域:
材料科学
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能量存储
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介电材料
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2022
·Vol. 34
·期 44
·2205787
·
IF 32.086
Liang Chen,Na Wang,Zhifei Zhang,Huifen Yu,Jie Wu,Shiqing Deng,Hui Liu,He Qi,Jun Chen
Lead-free dielectric ceramics with ultrahigh energy-storage performance are the core components used in next-generation advanced pulse power capacitors. However, the low energy storage density largely hinders their development towards miniaturization, lightweight, and integration. Here, an effective strategy of constructing local diverse polarization is designed in superparaelectrics to realize an ultrahigh energy storage density of ≈10.59 J cm −3 as well as a large efficiency of ≈87.6%. The excellent comprehensive energy-storage performance is mainly attributed to the design of ultrasmall polar nanoregions with local diverse polarization configuration, confirmed by scanning transmission electron microscopy, leading to the reduced heat loss, substantially enhanced polarization, and breakdown electric field compared to ceramics with single polarization configuration. Benefiting from these features, outstanding temperature/frequency/cycling stability and superior charge/discharge performance (power density ≈187.5 MW cm −3 , discharge energy density ≈3.52 J cm −3 , discharge rate ≈77 ns) are also achieved. This work demonstrates that local diverse polarization is a super strategy to design new dielectric materials with high energy-storage performance.
研究领域:
材料科学
·
介电材料
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储能
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陶瓷
·
极化工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）