High-Capacitance Hybrid Supercapacitor Based on Multi-Colored Fluorescent Carbon-Dots.
High-Capacitance Hybrid Supercapacitor Based on Multi-Colored Fluorescent Carbon-Dots.
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DOI：
10.1038/s41598-017-11347-1
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发表时间：
2017-09-11
影响因子：
4.6
通讯作者：
Erdem E
中科院分区：
文献类型：
--
作者：
Genc R;Alas MO;Harputlu E;Repp S;Kremer N;Castellano M;Colak SG;Ocakoglu K;Erdem E
使用过期可乐饮料，通过简单的热合成方法合成了多克量子产率从 4.6% 到 18.3% 的多色水溶性荧光碳纳米点（C-Dots），并将其用作导电和离子供给超级电容器组件。通过荧光和电子特性分析和比较了碳点的各种特性，包括尺寸、晶体结构、形态和表面特性以及拉曼和电子顺磁共振光谱。进一步将碳点修饰的α-氧化锰-聚吡咯（PPy）纳米棒用作超级电容器的阳极材料。还原氧化石墨烯与双咪唑基离子液体一起用作阴极，以增强电极表面的电荷转移和润湿能力。为此，我们使用通过N-烷基化反应合成的辛基双(3-甲基咪唑鎓)二碘化物(C8H16BImI)作为液体离子膜电解质。为了更深入地了解混合电容器性能的起源，已经进行了顺磁共振和阻抗谱。特别是，我们获得了高电容值（C = 17.3 μF/cm2），这不仅与合成质量密切相关，还与电极和电解质材料的选择密切相关。此外，混合超级电容器构造中使用的每个组件对于实现高电容值也发挥着关键作用。
Multi-colored, water soluble fluorescent carbon nanodots (C-Dots) with quantum yield changing from 4.6 to 18.3% were synthesized in multi-gram using dated cola beverage through a simple thermal synthesis method and implemented as conductive and ion donating supercapacitor component. Various properties of C-Dots, including size, crystal structure, morphology and surface properties along with their Raman and electron paramagnetic resonance spectra were analyzed and compared by means of their fluorescence and electronic properties. α-Manganese Oxide-Polypyrrole (PPy) nanorods decorated with C-Dots were further conducted as anode materials in a supercapacitor. Reduced graphene oxide was used as cathode along with the dicationic bis-imidazolium based ionic liquid in order to enhance the charge transfer and wetting capacity of electrode surfaces. For this purpose, we used octyl-bis(3-methylimidazolium)diiodide (C8H16BImI) synthesized by N-alkylation reaction as liquid ionic membrane electrolyte. Paramagnetic resonance and impedance spectroscopy have been undertaken in order to understand the origin of the performance of hybrid capacitor in more depth. In particular, we obtained high capacitance value (C = 17.3 μF/cm2) which is exceptionally related not only the quality of synthesis but also the choice of electrode and electrolyte materials. Moreover, each component used in the construction of the hybrid supercapacitor is also played a key role to achieve high capacitance value.
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