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储能系统技术
★ 5.0
钨青铜结构Sr5LaTi3Ta7O30改性BNBT陶瓷储能性能的提升
Enhancement of energy storage properties of BNBT ceramics modified by tungsten bronze-structured Sr5LaTi3Ta7O30
| 作者 | National Nature Science Foundation of China · Grant No. 52062007 · Jiwen Xu · Specific Research Project of Guangxi for Research Bases · Talents |
| 期刊 | Journal of Materials Science: Materials in Electronics |
| 出版日期 | 2025年1月 |
| 卷/期 | 第 36.0 卷 |
| 技术分类 | 储能系统技术 |
| 相关度评分 | ★★★★★ 5.0 / 5.0 |
| 关键词 | 陶瓷 复合材料 钨青铜结构 弛豫铁电体 储能效率 |
语言:
中文摘要
陶瓷作为电容器的介电层是获得高性能电容器的关键材料。复合材料是改性陶瓷的重要方法。本文提出了一种钨青铜结构Sr5LaTi3Ta7O30（SLTT）掺杂的0.93Bi0.5Na0.5TiO3-0.07BaTiO3（BNBT）钙钛矿陶瓷复合材料。该复合陶瓷在室温下实现了从铁电体到弛豫铁电体的相变。在SLTT含量为0.2 mol、外加电场为100 kV/cm时，获得了高达94.04%的优异效率；在SLTT含量为0.11 mol、外加电场为100 kV/cm时，获得了1.21 J/cm³的优异可恢复储能密度。因此，由钙钛矿相与钨青铜相构建的复合陶瓷在高功率脉冲电容器领域具有广阔的应用前景。
English Abstract
Ceramics as the dielectric layer of capacitors are the key materials for obtaining high-performance capacitors. Composite materials are an important method for modifying ceramics. The tungsten bronze-structured Sr 5 LaTi 3 Ta 7 O 30 (SLTT)-doped 0.93Bi 0.5 Na 0.5 TiO 3 -0.07BaTiO 3 (BNBT) perovskite ceramics were proposed. The phase transition of the composite ceramics from ferroelectric to relaxor ferroelectric was achieved at room temperature. An excellent efficiency of 94.04% was obtained at 0.2 mol SLTT and 100 kV/cm. An excellent recoverable energy storage density of 1.21 J/cm 3 was obtained at 0.11 mol SLTT and 100 kV/cm. Therefore, the composite ceramics constructed by perovskite and tungsten bronze phases have great application prospects in the field of high-power pulse capacitors.
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SunView 深度解读
该钨青铜结构复合陶瓷技术对阳光电源储能系统具有重要价值。其94.04%的高效率和1.21 J/cm³的储能密度可应用于ST系列PCS的直流支撑电容和PowerTitan系统的高压母线电容,提升功率密度和循环寿命。弛豫铁电特性带来的温度稳定性可优化储能变流器在宽温域工况下的性能。该材料技术可为三电平拓扑中的高频脉冲电容提供更小型化方案,助力阳光电源储能产品向高功率密度和高可靠性方向发展。