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Efficient electrophoretic deposition of MXene/reduced graphene oxide flexible electrodes for all-solid-state supercapacitors
Journal of Energy Storage ( IF 8.9 ) Pub Date : 2020-11-12 , DOI: 10.1016/j.est.2020.102070
Keliang Wang , Bocong Zheng , Madeline Mackinder , Nina Baule , Elias Garratt , Hong Jin , Thomas Schuelke , Qi Hua Fan

MXene has been considered as a promising electrode materials for energy storage devices. This work reports using an electrophoresis effect to efficiently deposit Ti3C2Tx/rGO composite on flexible substrates, which are subsequently used as the electrodes of all-solid-state supercapacitors. The electrophoresis deposition does not require a binder in the fabrication of the Ti3C2Tx/rGO electrodes. The structures and properties of the MXene/graphene electrode materials are characterized using Zeta potential, scanning electronic microscope, X-ray powder diffraction, Fourier-transform infrared and X-ray photoelectron spectroscopy. The performance of the all-solid-state flexible supercapacitors are evaluated using cyclic voltammetry, galvanostatic charge/discharge, electrochemical impedance spectroscopy, and cycle life tests. The devices show high areal specific capacitance of ~12 mF cm−2, small resistance, and excellent cycling stability at different current densities for over 4,000 cycles. Moreover, the all-solid-state flexible supercapacitors exhibit superior mechanical flexibility under different deformations.



中文翻译:

用于全固态超级电容器的MXene /还原氧化石墨烯柔性电极的高效电泳沉积

MXene被认为是用于能量存储设备的有前途的电极材料。这项工作报道了利用电泳效应在柔性基板上有效沉积Ti 3 C 2 T x / rGO复合材料,然后将其用作全固态超级电容器的电极。电泳沉积在Ti 3 C 2 T x的制造中不需要粘合剂/ rGO电极。利用Zeta电位,扫描电子显微镜,X射线粉末衍射,傅立叶变换红外光谱和X射线光电子能谱对MXene /石墨烯电极材料的结构和性能进行表征。使用循环伏安法,恒电流充/放电,电化学阻抗谱和循环寿命测试来评估全固态柔性超级电容器的性能。这些器件在超过4000个循环中显示出约12 mF cm -2的高面积比电容,小的电阻以及在不同电流密度下的出色循环稳定性。而且,全固态柔性超级电容器在不同变形下表现出优异的机械柔性。

更新日期:2020-11-12
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