Preparation and Electrochemical Performance of Novel Ordered Mesoporous Carbon with an Interconnected Channel Structure

• Published in: Langmuir Vol. 25; no. 14; pp. 7783 - 7785
• Main Authors: Liang, Yeru, Wu, Dingcai, Fu, Ruowen
• Format: Journal Article
• Language: English
• Published: Washington, DC American Chemical Society 21-07-2009
• Subjects: Chemistry; Colloidal state and disperse state; Electrochemistry; Exact sciences and technology; General and physical chemistry; Physical and chemical studies. Granulometry. Electrokinetic phenomena; Porous materials; Surface physical chemistry; Self assembly; Binary compound; Micropore; Nanoparticle; Channel structure; Ion transport; Ions; Carbon; Porous material; Silica; Mesoporosity; Thickness; Triblock copolymer; Microporosity; Silicon oxides; Preparation; Electrochemistry; Diffusion; Impedance; Diameter
• ISSN: 0743-7463; 1520-5827
• DOI: 10.1021/la9016646

A novel ordered mesoporous carbon with an interconnected channel structure (OMC-IC) has been successfully fabricated by adding proper hydrophilic SiO2 nanoparticles to the solution of triblock copolymer F127 and phenol-formaldehyde resol. Experimental results show that the presence of SiO2 nanoparticles does not hamper the self-assembly of F127 and resol to form an ordered two-dimensional hexagonal mesostructure. The neighboring channels of the OMC-IC are interconnected after removing SiO2 nanoparticles with a diameter larger than the thickness of the carbon wall. Such an interconnectivity of channels is beneficial in improving ion diffusion properties. The as-prepared OMC-IC exhibits much lower impedance to ion transport within both the channels and the micropores in the carbon wall, and thus has better electric double layer performance as compared to the conventional OMC with an unconnected channel structure.