Ternary Fe 3 O 4 /reduced graphene oxide/phytic acid doped polyaniline hybrid based supercapacitive electrode with high capacitance retention and good cycling stability

• Published in: New journal of chemistry Vol. 47; no. 19; pp. 9143 - 9152
• Main Authors: Zhao, Yaxiong, Zhou, Ming, Ni, Ruifeng, Li, Yi, Huang, Jiangyu, Li, Zhenyu, Chen, Jingyu
• Format: Journal Article
• Language: English
• Published: 16.05.2023
• ISSN: 1144-0546; 1369-9261
• DOI: 10.1039/D3NJ01150J

Pseudocapacitive electrodes with high rate retention and good cycling stability are highly desirable in constructing high-performance supercapacitors due to their rapid charge/discharge capacity and long service life, but they are still a challenge to realize. Herein, a ternary Fe 3 O 4 /reduced graphene oxide/phytic acid (PA)-doped polyaniline (F-RGO-p-PANI) hybrid has been prepared to address this challenge. Prompted by the multiple synergistic effects among RGO, Fe 3 O 4 , PA, and PANI, our F-RGO-p-PANI material exhibits a high specific capacitance ( C s ) of 459.1 F g −1 with a current density of 0.5 A g −1 . Interestingly, our supercapacitor displays both high capacitance retention (∼83.5%) under a broad current density range (from 0.25 to 20 A g −1 ) and high cycling stability (∼80.8%) over 10 000 cycles under a high current density (20 A g −1 ), better than previous results. Moreover, our supercapacitor also shows a high specific energy density of 58.1 W h kg −1 with a power density of 0.5 kW kg −1 . These results imply that our ternary F-RGO-p-PANI holds tremendous potential in fabricating rapidly charged/discharged supercapacitors.