Synthesis of free‐standing flexible <scp>g‐C<sub>3</sub>N<sub>4</sub></scp>/<scp>MXene</scp> film as electrode materials for supercapacitors
Guanghu Xu, Duohu Gong, Liming Yang, Zheng Yi, Yunkai Yue, Biao Wu, Yuxuan Feng, Tong Li, Weixin Zhang, Xinhui Jiang
Abstract
Summary Flexible supercapacitors (SCs) have the advantages of high flexibility, high mechanical strength, easy assembly, and high power density, so SCs can be widely used in portable and wearable electronic devices. It is of great significance to research and develop high‐performance electrode materials in order to further improve the performance of SCs and expand their application fields. Here, we prepared a free‐standing flexible g‐C 3 N 4 /Ti 3 C 2 hybrid film as electrode material for SCs by inserting two‐dimensional g‐C 3 N 4 nanosheets between Ti 3 C 2 layers‐based vacuum suction filtration methods. The addition of g‐C 3 N 4 nanosheets effectively prevented the self‐stacking of MXene layers, significantly increasing the interlayer spacing of g‐C 3 N 4 /Ti 3 C 2 hybrid film. The electrochemical results show that the mass specific capacity of 10 wt% g‐C 3 N 4 /Ti 3 C 2 is as high as 552 F g −1 at the scanning rate of 2 mV s −1 , which is 3.29 times higher than 168 F g −1 of Ti 3 C 2 , the capacity retention rate of 10 wt% g‐C 3 N 4 /Ti 3 C 2 is 97% after 10 4 cycles at a current density of 3 A g −1 .