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The role of carbon nanotubes in enhanced charge storage performance of VSe2: experimental and theoretical insight from DFT simulations

机译:碳纳米管在增强VSE的电荷存储性能中的作用:DFT模拟的实验和理论洞察

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Herein, we report the hybrid structure of metallic VSe _(2) and multi-walled carbon nanotube (MWCNT) based hybrid materials for high performance energy storage and high power operation applications. The dominance of capacitive energy storage performance behaviour of VSe _(2) /MWCNT hybrids is observed. A symmetric supercapacitor cell device fabricated using VSe _(2) /80 mg MWCNT delivered a high energy density of 46.66 W h kg ~(?1) and a maximum power density of 14.4 kW kg ~(?1) with a stable cyclic operation of 87% after 5000 cycles in an aqueous electrolyte. Using density functional theory calculations we have presented structural and electronic properties of the hybrid VSe _(2) /MWCNT structure. Enhanced states near the Fermi level and higher quantum capacitance for the hybrid structure contribute towards higher energy and power density for the nanotube/VSe _(2) .
机译:这里,我们报告了金属VSE _(2)和多壁碳纳米管(MWCNT)的混合材料的混合结构,用于高性能储能和高功率操作应用。观察到VSE _(2)/ MWCNT杂种的电容能量存储性能行为的优势。使用VSE _(2)/ 80mg MWCNT制造的对称超电卡池装置,具有46.66WH kg〜(α1)的高能密度,最大功率密度为14.4kW kg〜(α1),具有稳定的循环操作在水性电解质中5000次循环后87%。使用密度泛函理论计算,我们已经呈现了混合VSE _(2)/ MWCNT结构的结构和电子性质。用于混合结构的FERMI水平和更高量子电容附近的增强状态有助于纳米管/ VSE _(2)的更高能量和功率密度。

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