Nanotubular materials for supercapacitors
Nanotubular materials for supercapacitors
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DOI：
10.1016/s0378-7753(01)00736-4
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发表时间：
2001-07-01
影响因子：
9.2
通讯作者：
Béguin, F
中科院分区：
文献类型：
--
作者：
Frackowiak, E;Jurewicz, K;Béguin, F
不同类型的多壁纳米管（MWNTs）和单壁纳米管（SWNTs）已经被认为是用于超级电容器中能量存储的活性电极材料。由于其独特的介孔性，这些材料具有在电极/电解质界面中积累电荷的高能力。与SWNT相比，MWNT提供两倍高的电容值。高纯度的纳米管材料指出了一个盒子状的伏安特性，证明了一个完全的静电吸引力。赝电容效应观察到，如果金属颗粒：本和额外的功能化后的纳米管或导电聚吡咯（PPy）的沉积。由PPy改性的纳米管获得的电容值达到170 F/g，约为纳米管（约80 F/g）或纯PPy（约100 F/g）的两倍。90 F/g）。纳米复合材料的开放缠结网络似乎有利于在PPy中形成电层的更好效率。(C)2001 Elsevier Science B. V.保留所有权利。
Different types of multi-walled (MWNTs) and single-walled nanotubes (SWNTs) have been considered as active electrode materials for the storage of energy In supercapacitors. Due to their unique mesoporosity, these materials have a high ability for the accumulation of charges in the electrode/electrolyte interface. MWNTs supply twice higher values of capacitance in comparison to SWNTs. The nanotubular materials of high purity point out a box-like shape of voltammetry characteristics that proves an entirely electrostatic attraction. Pseudocapacitance effects are observed if metallic particles are: present and after additional functionalization of the nanotubes or deposition of conducting polypyrrole (PPy). The value of capacitance obtained from nanotubes modified by PPy reaches 170 F/g, about twice that given either by the nanotubes (ca, 80 F/g) or by pure PPy (ca. 90 F/g). The open entangled network of the nanocomposite seems to favour a better efficiency for the formation of the electrical layer in PPy. (C) 2001 Elsevier Science B.V. All rights reserved.