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3D MICRO-SUPERCAPACITORS BASED ON GRAPHENE/RUTHENIUMOXIDES HYBRID ELECTRODES

机译:基于石墨烯/ UT r n氧化物混合电极的3D微超级电容器

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摘要

We pioneered the fabrication of a high-performance 3D micro-supercapacitors (MSCs) comprised with graphene nanowall (GNW)/ruthenium oxides (RuOx) core-shell hybrids that grown on etched silicon microstructures through a full MEMS process. The unique strategy includes that effective harnessing the sidewall of the etched Si deep trench and the supported GNW/RuOx to render an ultra-large active electrode surface at the footprint area. The orderly aligned graphene nanowall can facilitate ions and electron transfer while the coated pseudocapacitive RuOx can contribute to a capacitance enhancement. The MSCs device proved a high areal energy, power densities of 3.55 ^Wh/cm2 and 0.89 mW/cm2, respectively, and along-term cycling stability with 90.2% capacitance retention after 3000 circles charge-discharge operation. The embedment of active electrode nanostructures within the substrate may help protect the electrode nanomaterials and make a subsequent encapsulation process with ease.
机译:我们率先制造了包含石墨烯纳米壁(GNW)/氧化钌(RuOx)核壳混合体的高性能3D微型超级电容器(MSC),该混合体通过完整的MEMS工艺在蚀刻的硅微结构上生长。独特的策略包括有效利用蚀刻后的Si深沟槽的侧壁和所支撑的GNW / RuOx,以在覆盖区提供超大的有源电极表面。有序排列的石墨烯纳米壁可以促进离子和电子转移,而涂覆的伪电容RuOx可以有助于电容的增强。 MSCs装置具有很高的面能,经过3000次充放电操作后,功率密度分别为3.55 ^ Wh / cm2和0.89 mW / cm2,并且具有90.2%的电容保持率的长期循环稳定性。有源电极纳米结构在基板内的嵌入可以帮助保护电极纳米材料并容易地进行后续的封装过程。

著录项

  • 来源
    《》|2017年|1-3|共3页
  • 会议地点
  • 作者

    Jinhua Li; Takahito Ono;

  • 作者单位

    Graduate School of Engineering, Tohoku University;

    Graduate School of Engineering, Tohoku University;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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