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A MXene‐Coated Activated Carbon Cloth for Flexible Solid‐State Supercapacitor
Energy Technology ( IF 3.6 ) Pub Date : 2020-01-09 , DOI: 10.1002/ente.201901003
Li Wang 1 , Danni Shao 1 , Jianyu Guo 1 , Siyong Zhang 1 , Yan Lu 2
Affiliation  

Herein, a new electrode material HHK‐CC@Ti3C2TX (HHK‐CC = activated carbon cloth, TX = F, O, or OH) for a flexible solid‐state supercapacitor (SSC) is prepared by a simple method. The activated carbon cloth (HHK‐CC) is obtained by treating with potassium permanganate beforehand. The specific area, oxygen‐containing functional group, hydrophilicity, and electrical conductivity of the activated CC are increased significantly after the potassium permanganate treatment. A few layers of Ti3C2TX flakes are coated directly on the HHK‐CC. When the loading Ti3C2TX on the HHK‐CC@Ti3C2TX electrode is 3 mg cm−2, the prepared electrode achieves a high capacitance of 1033 mF cm−2 at the current density of 1 mA cm−2. After assembling as a symmetrical SSC, the flexibility and mechanical strength of the CC are still preserved and no significant capacitance decreasing is observed under the conditions of bending and deformation. The capacitance value remains at 94.2% after 1000 cycles, and a high power density of 0.779 W cm−2 is obtained at the energy density of 4.5 μWh cm−2. This work gives a new strategy for designing flexible supercapacitors.

中文翻译:

用于柔性固态超级电容器的MXene涂层活性炭布

在本文中,一个新的电极材料HHK-CC @的Ti 3 c ^ 2 Ť X(HHK-CC =活性炭布,T X  =  楼O,或 OH)用于柔性固态超级电容器(SSC)是准备通过一种简单的方法。活性炭布(HHK-CC)是通过预先用高锰酸钾处理而获得的。高锰酸钾处理后,活性炭的比表面积,含氧官能团,亲水性和电导率显着增加。几层Ti 3 C 2 T X薄片直接涂在HHK-CC上。当加载Ti 3 C 2时Ť X上HHK-CC @的Ti 3 c ^ 2 Ť X电极为3mg厘米-2,将制备的电极实现了1033μF的厘米高电容-2在1毫安厘米的电流密度-2。组装成对称的SSC后,CC的柔韧性和机械强度仍然得以保留,并且在弯曲和变形的条件下没有观察到明显的电容减小。电容值保持在94.2%1000次循环之后,以及0.779W¯¯cm的高功率密度-2是在4.5厘米μWh的能量密度得到-2。这项工作为设计柔性超级电容器提供了新的策略。
更新日期:2020-01-09
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