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Yolk–Shell [email protected] Organic Network: A Smart Template with Thermally Disassemblable Yolk To Engineer Hollow MoS2/C Composites for High-Performance Supercapacitors
ACS Omega ( IF 3.7 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1021/acsomega.7b01426
Hyunjae Lee 1 , Jaewon Choi 1 , Yoon Myung 2 , Sang Moon Lee 3 , Hae Jin Kim 3 , Yoon-Joo Ko 4 , MinHo Yang 5 , Seung Uk Son 1
Affiliation  

Yolk–shell-type [email protected] organic network ([email protected]) materials were prepared by the Sonogashira coupling of tetra(4-ethynylphenyl)methane and 1,4-diiodobenzene on the surface of [email protected]2 and by the etching of SiO2. The diameter of PS yolk spheres and the thickness of MON shells were 150 and ∼10 nm, respectively. The thickness of the void space between the PS yolk and the MON shell was ∼30 nm. [email protected] were used as templates for the synthesis of MoS2/C composite materials. Because of the microporosity of the MON shells and the void space between the yolk and the shell, MoS2 precursor compounds were efficiently incorporated into [email protected] The heat treatment under argon resulted in the formation of hollow MoS2/C composites. The contents of MoS2 in the composites were systematically controlled by changing the amounts of precursor. MoS2/C with 58 wt % of MoS2 showed the best energy storage performance with a capacitance of 418 F/g at a 0.5 A/g current density as an electrode material of a coin cell supercapacitor, which is attributable to its hollow structure, high surface area, and the good distribution of the sliced MoS2 in the carbon matrix. Also, the MoS2/C-58 composite showed excellent retention of capacitances during 5000 cycles.

中文翻译:


蛋黄-壳 [email protected] 有机网络:一种具有热可拆卸蛋黄的智能模板,用于设计用于高性能超级电容器的空心 MoS2/C 复合材料



通过四(4-乙炔基苯基)甲烷和1,4-二碘苯在[email protected] 2表面上的Sonogashira偶联制备了蛋黄-壳型[email protected]有机网络([email protected])材料,并通过SiO 2的蚀刻。 PS蛋黄球的直径和MON壳的厚度分别为150和~10 nm。 PS 蛋黄和 MON 壳之间的空隙空间厚度约为 30 nm。 [email protected]被用作MoS 2 /C复合材料合成的模板。由于MON壳的微孔性以及蛋黄和壳之间的空隙空间,MoS 2前体化合物被有效地结合到[email protected]中。在氩气下的热处理导致中空MoS 2 /C复合材料的形成。通过改变前驱体的量来系统地控制复合材料中MoS 2的含量。 MoS 2 /C(MoS 2含量为 58 wt%)作为纽扣电池超级电容器的电极材料表现出最佳的储能性能,在 0.5 A/g 电流密度下电容为 418 F/g,这归因于其中空结构、高表面积以及切片MoS 2在碳基体中的良好分布。此外,MoS 2 /C-58复合材料在5000次循环期间表现出优异的电容保持能力。
更新日期:2017-11-07
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