纳米片
超级电容器
煅烧
材料科学
比表面积
多孔性
电容
化学工程
复合数
功率密度
堆积
碳纤维
介孔材料
电极
电化学
碳化
电解质
石墨烯
纳米技术
复合材料
化学
工程类
物理化学
作者
Zuo‐Xi Li,Bo Yang,Kangyu Zou,Lingjun Kong,Man-Li Yue,Hui-Hui Duan
出处
期刊:Carbon
[Elsevier]
日期:2019-04-01
卷期号:144: 540-548
被引量:117
标识
DOI:10.1016/j.carbon.2018.12.061
摘要
In this work, a novel Cu-MOF of translational 2D (4,4) layers has been designed and afforded as hierarchically stacking lamellae with interspace. Cu-MOF is initially employed as precursors to prepare the [email protected] composite through calcination-thermolysis procedure. Then [email protected] is etched with HCl, and subsequently activated by KOH to obtain APC with nanosheet morphology, which shows ultrahigh BET specific surface area (2491 m2 g−1) and pore volume of 1.50 cm3 g−1 (Vmirco = 0.12 cm3 g−1, Vmeso+macro = 1.38 cm3 g−1). Significantly, the APC nanosheet owns outstanding specific capacitance of 260.5 F g−1 at 0.5 A g−1 under a load of 8 mg/cm2. SSC based on APC achieves excellent specific energy density of 18.38 W h Kg−1 at specific power density of 350 W kg−1. Our SSC still retains 91.1% of original capacitance after 5000 cycles, exhibiting remarkable long-term cycle and reversibility. Amazingly, a red LED can be lighted up by three SSCs over 12 min. Therefore, the APC nanosheet is a competitive and promising candidate for preparing supercapacitor cells.
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