Surfactant-Free Assembly of Mesoporous Carbon Hollow Spheres with Large Tunable Pore Sizes

详细信息    查看全文

• 作者：Hongwei Zhang ; Owen Noonan ; Xiaodan Huang ; Yannan Yang ; Chun Xu ; Liang Zhou ; Chengzhong Yu
• 刊名：ACS Nano
• 出版年：2016
• 出版时间：April 26, 2016
• 年：2016
• 卷：10
• 期：4
• 页码：4579-4586
• 全文大小：431K
• 年卷期：0
• ISSN：1936-086X

文摘

Mesoporous carbon hollow spheres (MCHS) have wide applications, including catalysis, absorption, and energy storage/conversion. Herein, we report a one-pot, surfactant-free synthesis of MCHS using three molecules: resorcinol, formaldehyde, and tetrapropyl orthosilicate. The co-condensation process between the in situ generated silica primary particles and the polymer oligomers is regulated, leading to monodispersed MCHS with adjustable pore sizes from micropores to 13.9 nm. The resultant MCHS shows excellent performance for electrochemical double-layer capacitors with high capacitance (310 F g<sup>–1sup> at 1 A g<sup>–1sup>), excellent rate capability (157 F g<sup>–1sup> at 50 A g<sup>–1sup>), and outstanding cycling stability (98.6% capacity retention after 10 000 cycles at 10 A g<sup>–1sup>). Our one-pot synthesis strategy is versatile and can be extended to fabricate metal oxide@mesoporous carbon yolk–shell structures in the absence of surfactant, paving the way toward designed synthesis of nanostructured mesoporous carbon composites for various applications.