气凝胶
超级电容器
石墨烯
材料科学
电极
氧化物
电化学
储能
纳米技术
化学工程
电容
化学
冶金
量子力学
物理
工程类
物理化学
功率(物理)
作者
Bingyan Guo,Jie Tian,Xianglu Yin,Guoqiang Xi,Wang Wu,Xiaofei Shi,Wei Wu
标识
DOI:10.1016/j.colsurfa.2020.124683
摘要
MXene, a new two-dimensional (2D) material, has been extensively studied in the field of energy storage. However, the restacking and inferior stability of MXene severely affect their development. Herein, we fabricated a Ti3C2Tx-rGO aerogel through ascorbic acid-assisted hydrothermal treatment. It could effectively reduce the restacking of MXene and enhance the electrochemical properties of electrode material. The redox kinetics of electrode materials were analyzed. The diffusion-controlled process contributions from Ti3C2Tx/rGO-4 were significantly higher than Ti3C2Tx owing to the more exposed active sites after reduced graphene oxide (rGO) intercalation and increased layer spacing. Ti3C2Tx/rGO-4 aerogel binder-free electrode achieved a special capacitance of 313 F g−1 (about 174 % of Ti3C2Tx) at 1 A g−1. Moreover, Ti3C2Tx/rGO-4 symmetric supercapacitor demonstrated an outstanding energy density of 7.5 Wh kg−1 at a power density of 500 W kg−1 when the operated potential was at 1 V, showing a good application prospect.
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