A binder-free electrode based on Ti3C2Tx-rGO aerogel for supercapacitors

被引：66
作者：
Guo, Bingyan [1 ,2 ]
Tian, Jie [1 ,2 ]
Yin, Xianglu [1 ,2 ]
Xi, Guoqiang [1 ,2 ]
Wang, Wu [1 ,2 ]
Shi, Xiaofei [1 ,2 ]
Wu, Wei [1 ,2 ]
机构：
[1] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China
[2] Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
来源：
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 2020年 / 595卷
基金：
中国国家自然科学基金;
关键词：
Energy storage; Ti3C2Tx; Aerogel; Reduced graphene oxide; Binder-Free; Symmetric supercapacitors; ENHANCED ELECTROCHEMICAL PERFORMANCES; PSEUDOCAPACITIVE ELECTRODES; ENERGY-STORAGE; CARBIDE MXENE; GRAPHENE; COMPOSITE; CARBON; NANOSHEETS; NETWORKS; SILICATE;
D O I：
10.1016/j.colsurfa.2020.124683
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
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 500W kg(-1) when the operated potential was at 1 V, showing a good application prospect.
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页数：9
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