Electrophoretic deposition (EPD) of hydrous ruthenium oxides with PTFE and their supercapacitor performances
Electrophoretic deposition (EPD) of hydrous ruthenium oxides with PTFE and their supercapacitor performances
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DOI：
10.1016/j.electacta.2006.01.075
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发表时间：
2006-12-01
影响因子：
6.6
通讯作者：
Naoi, Katsuhiko
中科院分区：
文献类型：
--
作者：
Jang, Jong H.;Machida, Kenji;Naoi, Katsuhiko
研究了添加PTFE对水合氧化钌电极电泳沉积的影响。电极层的机械稳定性，连同沉积产率，通过使用水合氧化钌/PTFE分散体得到增强。用2%PTFE和10%水制备的电极获得了高的超级电容器性能。当PTFE含量较高时，倍率性能变差，电子电导率低;含水量高于10%导致沉积不均匀，循环性能和功率性能差。当电极在200 ℃下热处理10 h时，基于单个电极（在200 W/kg下）的比能量高达17.6 Wh/kg;而热处理时间为1和50 h时，可利用能量较低，这分别是由于高电阻和逐渐结晶。添加PTFE并在200 ℃下热处理10 h后，比电容增加了31%（约460 -> 599 F/g）。0.6在10 mV/s时，沉积量增加到1.7 mg/cm（2），初始电容为350 F/g。(c)2006爱思唯尔有限公司版权所有。
The effect of PTFE addition was investigated for the electrophoretic deposition (EPD) of hydrous ruthenium oxide electrodes. Mechanical stability of electrode layers, together with deposition yield, was enhanced by using hydrous ruthenium oxide/PTFE dispersions. High supercapacitor performance was obtained for the electrodes prepared with 2% PTFE and 10% water. When PTFE content was higher, the rate capability became poor with low electronic conductivity; higher water content than 10% resulted in non-uniform depositions with poor cycleability and power capability. When electrodes were heat treated at 200 degrees C for 10 h, the specific energy was as high as 17.6 Wh/kg based on single electrode (at 200 W/kg); while utilizable energy was lower with heat treatment time of I and 50 h, due to the high resistance and gradual crystallization, respectively. With PTFE addition and heat treatment at 200 degrees C for 10 h, the specific capacitance was increased by 31% (460 -> 599 F/g at ca. 0.6 mg/cm(2)) at 10 mV/s, and the deposition weight was increased up to 1.7 mg/cm(2) with initial capacitance of 350F/g. (c) 2006 Elsevier Ltd. All rights reserved.