Polyaniline nanofibers confined into graphene oxide architecture for high-performance supercapacitors. (20th November 2018)

• Record Type: Journal Article
• Authors: Zhou, Qihang; Wei, Tong; Yue, Jingming; Sheng, Lizhi; Fan, Zhuangjun
• Is Part Of: Electrochimica acta. Volume 291(2018)
• Page Start: 234
• Page End: 241
• Publication Date: 2018-11-20
• Subjects: Polyaniline -- Graphene oxide -- Rate performance -- Supercapacitors; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.08.104
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Due to its chemical stability, excellent reversibility and high pseudocapacitance, polyaniline (PANI) has attracted extensive attention for supercapacitors. However, the poor rate performance of PANI-based materials limits their large-scale application. Here, we report a facile strategy to fabricate PANI nanofibers confined into graphene oxide architecture (PGA50) through the adsorption of aniline onto stacked graphene oxide sheets and consequent in-situ polymerization. Benefited from the synergistic effect of PANI nanofibers and graphene oxide sheets, the sandwiched PGA50 has efficient electron/ion transfer pathways with stable structural framework. As a result, PGA50 electrode shows a high capacitance of 780 F g −1 at 0.5 A g −1 and excellent rate performance (521 F g −1 at 50 A g −1 ) compared to PANI (323 F g −1 at 0.5 A g −1 and 120 F g −1 at 50 A g −1 ). Significantly, the assembled PGA50//PGA50 supercapacitor achieves a high energy density of 30 Wh kg −1 at a power density of 216 W kg −1 . Graphical abstract: PANI nanofibers confined into graphene oxide architecture (PGA50) is synthesized through the adsorption of aniline onto stacked GO sheets and in-situ polymerization. Interestingly, the PGA50 shows interconnected GO-PANI structure with stable conducting network and excellent electrical conductivity. As a result, PGA50 electrode exhibits a high specific capacitance of 780 F g −1 at 0.5 A g −1 with excellent rate capability (remains 521 F g −1 at 50 A g −1 ). Highlights: The sandwiched PGA50 composited with stacked GO exhibits interconnected structure and stable structural framework. The PGA50 exhibits high capacitance of 780 F g −1 at 0.5 A g −1 and superior rate performance remains 521 F g −1 at 50 A g −1 . The current density I and scan rate v of PGA50 shows a linear response with fast electrolyte ions transportation.