Graphene oxide coated polyaminoanthraquinone@MXene based flexible film electrode for high-performance supercapacitor. (January 2023)

• Record Type: Journal Article
• Authors: An, Ning; Li, Wenli; Shao, Zhuhang; Zhou, Lei; He, Yuanyuan; Sun, Daming; Dong, Xiuyan; Hu, Zhongai
• Is Part Of: Journal of energy storage. Volume 57(2023)
• Publication Date: 2023-01
• Subjects: Supercapacitor -- Poly (1, 5-diaminoanthraquinone) -- MXene -- Flexible film electrode -- Electrochemical performance; Energy storage -- Periodicals; Energy storage -- Research -- Periodicals; 621.3126
• DOI: 10.1016/j.est.2022.106180
• Languages: English
• ISSNs: 2352-152X

Abstract

Abstract: The diversified development of electronic products stimulates the great demand for flexible energy storage devices with high energy density. Poly (1, 5-diaminoanthraquinone) (PDAAQ) is considered as a highly promising electrode material due to its unique π-conjugated structure and high theoretical capacitance. Herein, we first prepare cetyltrimethylammonium bromide (CTAB) modified graphite oxide (GO) coated poly (1, 5-diaminoanthraquinone) (PDAAQ) nanotubes@Ti3 C2 TX flexible film (CGO/PDAAQ@MXene) by electrostatic self-assembly. After modification with cationic surfactant, CTAB modified GO coated PDAAQ nanotubes (CGO/PDAAQ) exhibits overall positive charge, and then polymer nanotubes are uniformly inserted into negatively charged layered MXene to effectively avoid self-stacking of MXene layers. Under the synergistic effect, the ordered 1D nanotubes structure of CGO/PDAAQ and excellent intrinsic conductivity of MXene can greatly enhance the electron transfer and ion migration rates for electrode. The flexible self-supporting CGO/PDAAQ@MXene has good mechanical properties and can be completely recovered after 500 bending tests. Electrochemical tests of the flexible electrode exhibit the specific capacitance of 346 F g at 1 A g −1 (865 mF cm −2 at 2.5 mA cm −2 ), good rate performance and excellent cyclic stability. The as-fabricated flexible asymmetric supercapacitor exhibits high energy density of 41 Wh kg −1 at 404 W kg −1, which can successfully light 35 small LED bulbs. Graphical abstract: Unlabelled Image Highlights: CGO/PDAAQ@MXene was got by electrostatic self-assembly between negatively charged MXene and positively charged CGO/PDAAQ. The nanotubes structure of CGO/PDAAQ and excellent conductivity of MXene can enhance the electron and ion migration rates. The CGO/PDAAQ@MXene film exhibits the area specific capacitance of 865 mF cm -2 at 2.5 mA cm -2 . The assembled flexible asymmetric supercapacitor shows high energy density of 41 Wh kg -1 at 404 W kg -1 .