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首页> 美国卫生研究院文献>Scientific Reports >All-solid-state high performance asymmetric supercapacitors based on novel MnS nanocrystal and activated carbon materials
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All-solid-state high performance asymmetric supercapacitors based on novel MnS nanocrystal and activated carbon materials

机译：基于新型MnS纳米晶体和活性炭材料的全固态高性能不对称超级电容器

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All-solid-state high-performance asymmetric supercapacitors (ASCs) are fabricated using γ-MnS as positive electrode and porous eggplant derived activated carbon (EDAC) as negative electrode with saturated potassium hydroxide agar gel as the solid electrolyte. The laminar wurtzite nanostructure of γ-MnS facilitates the insertion of hydroxyl ions into the interlayer space, and the manganese sulfide nanowire offers electronic transportation channels. The size-uniform porous nanostructure of EDAC provides a continuous electron pathway as well as facilitates short ionic transportation pathways. Due to these special nanostructures of both the MnS and the EDAC, they exhibited a specific capacitance of 573.9 and 396 F g−1 at 0.5 A g−1, respectively. The optimized MnS//EDAC asymmetric supercapacitor shows a superior performance with specific capacitance of 110.4 F g−1 and 89.87% capacitance retention after 5000 cycles, a high energy density of 37.6 Wh kg−1 at a power density of 181.2 W kg−1 and remains 24.9 Wh kg−1 even at 5976 W kg−1. Impressively, such two assembled all-solid-state cells in series can light up a red LED indicator for 15 minutes after fully charged. These impressive results make these pollution-free materials promising for practical applications in solid aqueous electrolyte-based ASCs.
机译：以γ-MnS为正极，多孔茄子衍生活性炭（EDAC）为负极，饱和氢氧化钾琼脂凝胶为固体电解质，制备了全固态高性能不对称超级电容器（ASC）。 γ-MnS的层状纤锌矿纳米结构有助于将氢氧根离子插入层间空间，硫化锰纳米线提供了电子传输通道。 EDAC的尺寸均一的多孔纳米结构提供了连续的电子路径，并促进了短的离子传输路径。由于MnS和EDAC的这些特殊的纳米结构，它们在0.5 A g -1 下的比电容分别为573.9和396 F g -1 。经过优化的MnS // EDAC不对称超级电容器具有优越的性能，在5000次循环后的比电容为110.4 F g -1 ，电容保持率为89.87％，能量密度为37.6 Wh kg -1 的功率密度为181.2 W kg -1 ，即使在5976 W kg -1 时仍保持24.9 Wh kg -1 。令人印象深刻的是，这样的两个组装好的全固态电池串联后，充满电后可以点亮红色LED指示灯15分钟。这些令人印象深刻的结果使这些无污染的材料有望在基于固体电解质的ASC中实际应用。

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