Challenge between sequence presences of conductive additives on flexibility, dielectric and supercapacitance behaviors of nanofibrillated template of bacterial cellulose aerogels. (June 2019)

• Record Type: Journal Article
• Authors: Hosseini, Hadi; Teymouri, Mohsen; Saboor, Sajad; Khalili, Alireza; Goodarzi, Vahabodin; Poudineh Hajipoor, Fatemeh; Khonakdar, Hossein Ali; Shojaei, Shahrokh; Asefnejad, Azadeh; Bagheri, Hasan
• Is Part Of: European polymer journal. Volume 115(2019)
• Page Start: 335
• Page End: 345
• Publication Date: 2019-06
• Subjects: Bacterial cellulose -- Electrical conductivity -- Flexible aerogel -- Bio-nanocomposite -- Supercapacitor; Polymers -- Periodicals; Polymerization -- Periodicals; Polymères -- Périodiques; Polymérisation -- Périodiques; Polymerization; Polymers; Periodicals; Electronic journals; 547.705
• DOI: 10.1016/j.eurpolymj.2019.03.033
• Languages: English
• ISSNs: 0014-3057

Abstract

Graphical abstract: Highlights: Introducing ternary BC based aerogels containing sequence additives ( Ag and PANI ). The order of addition of PANI and Ag had significant effects on aerogel properties. Ternary aerogel of BC/Ag/PANI showed high flexibility and conductivity properties. BC/Ag/PANI revealed energy density of 34 Wh kg −1 at a power density of 459 Wh kg −1 . The capacitance behavior of BC/Ag/PANI was excellence than that of BC/PANI/Ag. Abstract: The fabrication of flexible, freestanding, lightweight, renewable, low cost and also the high performance of novel supercapacitors is pivotal in electronic fields. In this work, two series of ternary bio-nanocomposite flexible aerogels based on bacterial cellulose ( BC ) as a template and containing silver nanoparticles ( AgNPs ) and polyaniline ( PANI ) as conductive agents facilely fabricate using an in situ method, in which Ag and PANI embedded within BC matrix as sequences. Morphology of ternary aerogels reveals the core-shell and branch-grape microstructures for BC/Ag/PANI and BC/PANI/Ag samples, respectively. BET analysis exhibits that specific surface area of BC/Ag/PANI (145 m 2 g −1 ) is higher than BC/PANI/Ag (130 m 2 g −1 ) aerogel. Electrical conductivity measurements indicated that BC/Ag/PANI (1.25 S cm −1 ) possesses higher electrical conductivity than BC/PANI/Ag (0.00693 S cm −1 ) aerogels. The coexistence of PANI and Ag within BC texture, significantly altered the interfacial polarization and relaxation spectra of ternary system. A specific capacitance 357 F g −1 at 0.5 A g −1 associated with 83% cyclic stability over 2000 cycles is observed for BC/Ag/PANI, while BC/PANI/Ag showed specific capacitance of 232 F g −1 at 0.5 A g −1 as well as 74% capacitance retention. Furthermore, in symmetrical supercapacitor setup for BC/Ag/PANI, a high energy density of 34 Wh kg −1 at a power density of 459 Wh kg −1 is obtained. These findings indicated that BC/Ag/PANI aerogel as a flexible and lightweight electrode could be highly used in the field of electrical energy storage.