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March 8, 2026Scientia Sinica Technologica0 citations

Hierarchically porous 3D Y-branched carbon tube grids for high-performance filter capacitors

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GCGan ChenFHFangming HanGMGelei Meng

Key Points

  • This research aims to develop a high-performance filter capacitor using a novel 3D carbon tube structure.
  • Created Y-branched carbon tube grids with a hierarchically porous structure
  • Systematically controlled parameters like branching algebra and anodization time
  • Optimized height ratios of coarse and fine carbon tubes for enhanced performance.
  • Achieved a high area-specific capacitance of 3.6 mF cm-2 at 120 Hz
  • Maintained a phase angle of -80°
  • Outperformed most existing filter double-layer capacitors.

Abstract

滤波电容器在交流/直流电能转换中发挥关键作用。使用电化学双电层电容器替代体积庞大的铝电解电容器，有望实现电子设备的小型化。然而，在双电层电容器的电荷存储能力与离子/电子传输速度之间取得平衡面临挑战。本文创制了具有分级多孔结构的Y型分枝碳管三维互连网格膜（3D-YCT）作为滤波双电层电容器的电极。通过系统调控分枝代数、各阶段阳极氧化时间等关键参数, 实现了对碳管的直径与密度的精确调控, 并优化了粗、细碳管在垂直方向上的高度比例, 实现了离子迁移动力学与电荷存储空间的协同提升。基于3D-YCT的双电层电容器在120 Hz下实现了3.6 mF cm-2的高面积比电容，且相位角保持在-80°，性能优于大多数已报道的滤波双电层电容器。以上研究成果为构建高性能小型化滤波电容器提供了新思路与方案。

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Cite This Study

Chen et al. (2026) studied this question.

synapsesocial.com/papers/69acc56732b0ef16a404f6d5https://doi.org/10.1360/sst-2026-0028
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