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相关概念视频

MOS Capacitor01:25

MOS Capacitor

773
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
773

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低层V2C/MWCNT具有高离子可访问性,用于离子存储.

Shouchao Fu1, Xunpeng Zhang1, Bingxian Wu1

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几层V2C MXene与碳纳米管相结合,显著提高了离子电池的性能. 这种新的f-V2C/MWCNT材料为先进的能量存储提供了更好的离子可访问性和稳定性.

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科学领域:

  • 材料科学 材料科学 材料科学
  • 电化学 电化学 电化学
  • 纳米技术 纳米技术

背景情况:

  • 碳化瓦纳 (V2C) MXene在离子电池中具有较高的理论容量.
  • 堆叠的多层V2C结构存在较差的离子可访问性和循环稳定性.

研究的目的:

  • 合成少数层V2C (f-V2C) 并将其与多壁碳纳米管 (MWCNTs) 集成.
  • 改善V2C的离子可访问性,特定表面积和结构稳定性,以增强Li+存储.

主要方法:

  • 合成几个层的V2C (f-V2C) 材料.
  • 复合形成的f-V2C与多壁碳纳米管 (MWCNTs).
  • 在离子电池应用中对f-V2C/MWCNT复合物的电化学测试.

主要成果:

  • f-V2C/MWCNT复合材料显示出丰富的孔隙,提高了+离子的可访问性.
  • MWCNT提高了特定表面积,降低了电荷转移阻力,增加了结构稳定性.
  • 在100个循环后,在0.1Ag-1下达到531mAhg-1的特定容量,在5.0Ag-1下达到166mAhg-1.
  • 在1000个循环后以5.0A g-1的速度保持95%的容量,表现出极好的循环稳定性.

结论:

  • f-V2C/MWCNT复合材料显示出高性能离子电池应用的巨大潜力.
  • 增强的离子可访问性和结构完整性是优越电化学性能的关键.
  • 这种材料为先进的+存储解决方案提供了一个有前途的途径.