Fabrication of carbon nanotube/NiOx(OH)y nanocomposite by pulsed electrodeposition for supercapacitor applications
Fabrication of carbon nanotube/NiOx(OH)y nanocomposite by pulsed electrodeposition for supercapacitor applications
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DOI：
10.1016/j.jpowsour.2013.06.144
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发表时间：
2014-01-01
影响因子：
9.2
通讯作者：
Mabuchi, Mamoru
中科院分区：
文献类型：
--
作者：
Hakamada, Masataka;Moriguchi, Akitoshi;Mabuchi, Mamoru
采用电泳沉积碳纳米管（CNT）、脉冲电沉积镍（Ni）和空气中退火的方法制备了CNT/Ni纳米复合薄膜。NiO/Ni（OH）（2）粒子的直径为7 +/-4 nm，均匀分散在CNT网络上。循环伏安法显示CNT/NiOx（OH）（y）纳米复合膜在1、10、30、50和100 mV s（-1）下分别具有每质量活性Ni物质1451、1158、998、896和851 F g（-1）的高比电容，在523 K下退火1 h，Ni（OH）（2）脱水生成NiO，从而提高了沉积Ni物种的赝电容。较长的退火时间降低了电容，因为烧结和随后的表面积的Ni沉积物的减少。所制造的CNT/NiOx（OH）（y）纳米复合材料的电容在20，000次电位扫描循环后保持不变。(C)2013爱思唯尔有限公司版权所有。
Nanocomposite films based on carbon nanotubes (CNTs)/nicicel (Ni)-species were fabricated by electrophoretic deposition (EPD) of CNT, followed by pulsed electrodeposition of Ni and annealing in air. NiO/Ni(OH)(2) particles with 7 +/- 4 nm diameters were uniformly dispersed on the CNT networks. Cyclic voltammetry revealed that the CNT/NiOx(OH)(y) nanocomposite films had high specific capacitances of 1451, 1158, 998, 896 and 851 F g(-1) per mass of active Ni species at 1, 10, 30, 50 and 100 mV s(-1), respectively, in the potential window of 0.4 V. An annealing time of 1 h (at 523 K) enhanced the pseudocapacity of deposited Ni species by the dehydration of Ni(OH)(2) to form NiO. Longer annealing time reduced the capacitance because of sintering and subsequent decrease in surface area of Ni deposits. The capacitance of the fabricated CNT/NiOx(OH)(y) nanocomposite was maintained after 20,000 cycles of potential sweeping. (C) 2013 Elsevier B.V. All rights reserved.