Comparative Electroadsorption Study of Mesoporous Carbon Electrodes with Various Pore Structures

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• 作者：Zheng Peng ; Dengsong Zhang ; Liyi Shi ; Tingting Yan ; Shuai Yuan ; Hongrui Li ; Ruihua Gao ; Jianhui Fang
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：September 1, 2011
• 年：2011
• 卷：115
• 期：34
• 页码：17068-17076
• 全文大小：1114K
• 年卷期：v.115,no.34(September 1, 2011)
• ISSN：1932-7455

文摘

Mesoporous carbons with various porous structures, such as 2-D hexagonal (P6m), 3-D cubic symmetry (Im3̅m), and 3-D bicontinuous (Ia3̅d) space groups, were used to prepare electrodes in desalinating capacitors which were used to remove ions from the saltwater solution. The parallel analysis was conducted with nitrogen adsorption鈥揹esorption, small-angle X-ray diffraction, transmission electron microscopy, and so on. The influence of pore structure and size of mesoporous carbon electrodes and ion types on the electroadsorption processes were investigated. The hydrophilic characteristics of the carbon electrodes surface were compared by water contact angle. It is demonstrated that electroadsorption characteristics of mesoporous carbon electrodes vary for the different mesopores and different types of ions. The relationship between the electrochemical capacitive ability and ion dimensions was established. These mesoporous carbons have been proved to be promising electrode materials with good reversibility and high stability, which can be potentially used for capacitive deionization.