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相关概念视频

MOS Capacitor01:25

MOS Capacitor

752
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...
752

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Ni3V2O8 带有rGO涂层的玛丽戈德结构,用于增强超级电容器性能.

Manesh A Yewale1, Pritam J Morankar2, Vineet Kumar1

  • 1School of Mechanical Engineering, Yeungnam University, Gyeongsan 38541, Republic of Korea.

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概括

这项研究为超级电容器合成了Ni3V2O8减少的石墨烯氧化物 (NVO-rGO). NVO-rGO表现出卓越的电化学性能,显示出作为高性能电极材料的潜力.

关键词:
这就是FESEM.Ni3V2O8 的使用方法在Ni3V2O8-rGO纳米粒子中.这就是TEMEM.这是XPSXPS.热水合成的热水合成超级电容器是一个超级电容器.

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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:

  • 超级电容器是重要的储能装置.
  • 开发高性能电极材料对于推进超级电容器技术至关重要.
  • -氧化物和减少的石墨烯氧化物是超级电容电极的有希望的候选者.

研究的目的:

  • 为了合成和表征Ni3V2O8 (NVO) 和NVO减少的石墨烯氧化物 (NVO-rGO) 复合材料.
  • 评估NVO-rGO作为超级电容器电极材料的电化学性能.
  • 使用NVO-rGO构建和测试一个不对称的超级电容器装置.

主要方法:

  • 为NVO和NVO-rGO进行热水合成.
  • 用于晶体结构分析的X射线衍射 (XRD).
  • 场辐射扫描电子显微镜 (FESEM) 用于形态学.
  • 化学状态的X射线光电子光谱 (XPS) 检测.
  • 电化学阻抗光谱 (EIS),电静电电荷放电 (GCD) 和循环电压计 (CV) 用于性能评估.

主要成果:

  • NVO-rGO的特定电容为132 F/g,能量密度为5.04 Wh/kg,功率密度为187 W/kg.
  • 使用NVO-rGO和活性炭的不对称超级电容器实现了7.85 F/g的特定电容,能量密度为3.52 Wh/kg,功率密度为225 W/kg.
  • 非对称超级电容器在循环稳定性测试中显示了99%的哥伦布效率和87%的能量保留.

结论:

  • NVO-rGO是超级电容器的一个有前途的高性能电极材料.
  • 复合结构增强了电化学性能,与裸体NVO相比.
  • 开发的非对称超级电容器显示出良好的能量和功率密度,具有稳定的循环性能.