Nanoarchitectonics of mesoporous carbon from C60/PCBM hybrid crystals for supercapacitor
Nanoarchitectonics of mesoporous carbon from C60/PCBM hybrid crystals for supercapacitor
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用于超级电容器的 C60/PCBM 杂化晶体介孔碳的纳米结构
DOI：
10.1016/j.carbon.2022.09.051
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发表时间：
2022-09
期刊：
影响因子：
10.9
通讯作者：
Hongguang Li
中科院分区：
文献类型：
--
作者：
Jinrui Li;Kaipeng Zhuang;Yanfen Mao;Chong Liu;Minghao Pang;Hongguang Li
富勒烯具有高度对称的几何结构，是纳米结构中很受欢迎的基本材料。各种尺寸的富勒烯超结构的成功制备为其应用奠定了基础。然而，大多数富勒烯超结构缺乏孔隙度和有限的导电性阻碍了它们在超级电容器等能源相关领域的应用。本文以富勒烯c60及其衍生物[6,6]-苯基c61 -丁酸甲酯（PCBM）为原料，通过改进的液-液界面沉淀法，构建了具有交叉管状和六方密堆积（hcp）晶格的杂化晶体。随后的煅烧可以大大改善该杂化晶体的孔隙度，制备的介孔碳的BET表面积增加了近30倍（从13.91增加到432.41 m2 - 1），作为超级电容器的电极材料表现出良好的性能，循环2000次后电容保持率为87.3%，比电容分别为~ 213 F g−1at 5 mV s−1和~ 158 F g−1at 1a g−1。与单纯由富勒烯形成的晶体相比，PCBM的存在降低了煅烧温度，诱导了氧的自掺杂。此外，溶剂蚀刻可以在超结构上产生粗糙的表面，从而提高了材料在超级电容器中的性能。我们的工作为富勒烯衍生功能材料在储能领域的应用提供了一种新的设计策略，并扩展了在超级电容器中用作电极材料时调节其性能因素的知识。
Owning a highly symmetric geometry, fullerenes are popular building blocks in nanoarchitectonics. The successful preparation of fullerene superstructures with various sizes and dimensions forms the basis for their applications. However, the lack of porosity and the limited electrical conductivity of most fullerene superstructures prevent their applications in energy-related fields such as supercapacitors. Herein, hybrid crystals with a crossed-tubular morphology and a hexagonal close packed (hcp) lattice were constructed by fullerene C60and its derivative, [6,6]-phenyl-C61-butyric acid methyl ester (PCBM), through a modified liquid-liquid interfacial precipitation method. Subsequent calcination can greatly improve the porosity of this hybrid crystals and produce mesoporous carbon with an increased BET surface area nearly 30 times (from 13.91 to 432.41 m2g−1), which exhibited a good performance as an electrode material in supercapacitor with a capacitance retention rate of 87.3% after 2000 cycles and specific capacitances of ∼213 F g−1at 5 mV s−1and ∼158 F g−1at 1 A g−1, respectively. Compared to the crystals formed solely by fullerenes, the presence of PCBM lowered the calcination temperature and induced self-doping of oxygen. In addition, rough surfaces could be produced on the superstructures by solvent etching, which increased as well the performance of the material in supercapacitor. Our work provided a new strategy to engineer fullerene-derived functional materials for applications in energy storage and expanded the knowledge on the factors regulating their performance when using as electrode materials in supercapacitors.
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影响因子：
64.8
作者：
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作者：
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影响因子：
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作者：
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