Pseudocapacitive performance of phenothiazine functionalized graphene aerogel

• Main Authors: Lee, Soon Poh, Ali, Gomaa A.M., Assiri, Mohammed Ali, Kong, Kien Voon, Teo, Ellie Yi Lih, Chong, Kwok Feng
• Format: Article
• Language: English; English
• Published: Elsevier B.V. 2023
• Subjects: HD Industries. Land use. Labor; Q Science (General); T Technology (General)
• Online Access: http://umpir.ump.edu.my/id/eprint/40731/1/Pseudocapacitive%20performance%20of%20phenothiazine%20functionalized.pdf; http://umpir.ump.edu.my/id/eprint/40731/2/Pseudocapacitive%20performance%20of%20phenothiazine%20functionalized_ABS.pdf; http://umpir.ump.edu.my/id/eprint/40731/; https://doi.org/10.1016/j.apsusc.2022.156069; https://doi.org/10.1016/j.apsusc.2022.156069

This study utilizes light adsorbing molecule, phenothiazine (PTZ) to reduce graphene oxide (GO) and functionalize into PTZ-rGO aerogel (PTZ-rGO). The UV excited PTZ reduces GO via electron transfer while PTZ is simultaneously oxidized and functionalized onto rGO to produce PTZ-rGO aerogel. The optimum incorporation of PTZ on rGO sheets renders good electrochemical active surface area of 495.71 m2 g−1 and enhances the diffusion behavior up to 41.92%. This pseudocapacitive effect and the excellent surface property provide promising charge storage results of 235.5 F g−1 at 0.5 A g−1. Furthermore, the stable charge-discharge cycles with 92% capacitance retention after 10,000 cycles render it an excellent electrode material for supercapacitor fabrication.