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Nanoelectrode design from microminiaturized honeycomb monolith with ultrathin and stiff nanoscaffold for high-energy micro-supercapacitors.
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-15 , DOI: 10.1038/s41467-019-14170-6 Zhendong Lei 1, 2 , Long Liu 1 , Huaping Zhao 1 , Feng Liang 3 , Shilei Chang 3 , Lei Li 4 , Yong Zhang 2 , Zhan Lin 4 , Jörg Kröger 1 , Yong Lei 1
Nature Communications ( IF 14.7 ) Pub Date : 2020-01-15 , DOI: 10.1038/s41467-019-14170-6 Zhendong Lei 1, 2 , Long Liu 1 , Huaping Zhao 1 , Feng Liang 3 , Shilei Chang 3 , Lei Li 4 , Yong Zhang 2 , Zhan Lin 4 , Jörg Kröger 1 , Yong Lei 1
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Downsizing the cell size of honeycomb monoliths to nanoscale would offer high freedom of nanostructure design beyond their capability for broad applications in different fields. However, the microminiaturization of honeycomb monoliths remains a challenge. Here, we report the fabrication of microminiaturized honeycomb monoliths-honeycomb alumina nanoscaffold-and thus as a robust nanostructuring platform to assemble active materials for micro-supercapacitors. The representative honeycomb alumina nanoscaffold with hexagonal cell arrangement and 400 nm inter-cell spacing has an ultrathin but stiff nanoscaffold with only 16 ± 2 nm cell-wall-thickness, resulting in a cell density of 4.65 × 109 cells per square inch, a surface area enhancement factor of 240, and a relative density of 0.0784. These features allow nanoelectrodes based on honeycomb alumina nanoscaffold synergizing both effective ion migration and ample electroactive surface area within limited footprint. A micro-supercapacitor is finally constructed and exhibits record high performance, suggesting the feasibility of the current design for energy storage devices.
中文翻译：
纳米电极设计采用超薄和坚固的纳米支架制成的超小型蜂窝整体材料，用于高能微型超级电容器。
将蜂窝状整料的单元尺寸减小至纳米级将提供纳米结构设计的高度自由度，而超出了它们在不同领域中的广泛应用的能力。然而，蜂窝整料的微小型化仍然是挑战。在这里，我们报道了微小型化的蜂窝状整体材料-蜂窝状氧化铝纳米支架的制造，因此，作为组装微型超级电容器活性材料的强大纳米结构平台。具有六边形单元排列和单元间间距为400 nm的代表性蜂窝状氧化铝纳米支架具有超薄但坚硬的纳米支架，单元壁厚度仅为16±2 nm，从而导致每平方英寸表面的密度为4.65×109个单元面积增强因子为240，相对密度为0.0784。这些特征允许基于蜂窝状氧化铝纳米支架的纳米电极在有限的占地面积内协同有效的离子迁移和充足的电活性表面积。最终构建了微型超级电容器，并展现了创纪录的高性能，这表明了当前储能设备设计的可行性。
更新日期：2020-01-15
中文翻译：
纳米电极设计采用超薄和坚固的纳米支架制成的超小型蜂窝整体材料，用于高能微型超级电容器。
将蜂窝状整料的单元尺寸减小至纳米级将提供纳米结构设计的高度自由度，而超出了它们在不同领域中的广泛应用的能力。然而，蜂窝整料的微小型化仍然是挑战。在这里，我们报道了微小型化的蜂窝状整体材料-蜂窝状氧化铝纳米支架的制造，因此，作为组装微型超级电容器活性材料的强大纳米结构平台。具有六边形单元排列和单元间间距为400 nm的代表性蜂窝状氧化铝纳米支架具有超薄但坚硬的纳米支架，单元壁厚度仅为16±2 nm，从而导致每平方英寸表面的密度为4.65×109个单元面积增强因子为240，相对密度为0.0784。这些特征允许基于蜂窝状氧化铝纳米支架的纳米电极在有限的占地面积内协同有效的离子迁移和充足的电活性表面积。最终构建了微型超级电容器，并展现了创纪录的高性能，这表明了当前储能设备设计的可行性。
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