Activated carbon nanofiber webs made by electrospinning for capacitive deionization

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• 作者：Gang Wang^a ; Chao Pan^a ; ^b ; Liuping Wang^a ; Qiang Dong^a ; Chang Yu^a ; Zongbin Zhao^a ; Jieshan Qiu^a ; ^{jqiu@dlut.edu.cn}
• 关键词：Polyacrylonitrile ; Electrospinning ; Activated carbon fibers ; Desalination ; Capacitive deionization
• 刊名：Electrochimica Acta
• 出版年：2012
• 期刊代码：30_00134686
• 类别：ch
• 出版时间：1 May, 2012
• 卷：69
• 期：Complete
• 页码：65-70
• 文件大小：1205 K

摘要

Activated carbon fiber (ACF) webs with a non-woven multi-scale texture were fabricated from polyacrylonitrile (PAN), and their electrosorption performance in capacitive deionization for desalination was investigated. PAN nanofibers were prepared by electrospinning, followed by oxidative stabilization and activation with carbon dioxide at 750-900 掳C, resulting in the ACF webs that were characterized by X-ray diffraction, Raman spectroscopy, scanning electron microscopy and nitrogen adsorption. The results show that the as-made ACFs have a specific surface area of 335-712 m²/g and an average nanofiber diameter of 285-800 nm, which can be tuned by varying the activation temperature. With the ACF webs as an electrode, an electrosorption capacity as high as 4.64 mg/g was achieved on a batch-type electrosorptive setup operated at 1.6 V. The ACF webs made by electrospinning are of potential as an excellent electrode material for capacitive deionization for desalination.