Core–sheath structured bacterial cellulose/polypyrrole nanocomposites with excellent conductivity as supercapacitors

Abstract

Core-sheath structured conductive nanocomposites were prepared by wrapping a homogenous layer of polypyrrole (PPy) around bacterial cellulose (BC) nanofibers via in situ polymerization of self-assembled pyrrole. By manipulating the ordered core-sheath nanostructure, BC/PPy nanocomposites were achieved and outstanding electrical conductivity as high as 77 S cm À1 was obtained with the optimized reaction protocols, i.e., feeding mass ratio of BC/Py 1 : 10, molar ratio of FeCl 3 /Py 0.5 : 1, molar ratio of HCl/Py 1.2 : 1, volume ratio of DMF-H 2 O 1 : 2, reaction temperature 0 C, and reaction time 6 h. The BC/PPy nanocomposites demonstrated promising potential for supercapacitors, with a highest mass specific capacitance hitting 316 F g À1 at 0.2 A g À1 current density. The whole-optimized protocol in preparing highly conductive PPy/BC composites may be readily extended to the preparation of new conductive materials based on core-sheath structured BC nanocomposites for various technological applications.

High performance supercapacitor based on Ni3S2/carbon nanofibers and carbon nanofibers electrodes derived from bacterial cellulose

“…Typically, 15 then transferred into a Teflon-lined stainless steel autoclave and maintained at 180 C for 12 h. After that, the autoclave was naturally cooled to room temperature. Finally, the precipitate was filtered off, washed with distilled water and dried at 60 C for 12 h.…”

Polypyrrole/nickel sulfide/bacterial cellulose nanofibrous composite membranes for flexible supercapacitor electrodes

“…For example, CdS, CdSe, and Fe 3 O 4 nanoparticles have been synthesized and stabilized on BC nanofibers using the in situ precipitation method Zhang et al 2011;Yang et al 2012). The in situ production of PPy (Müller et al 2011(Müller et al , 2013Wang et al 2013;Xu et al 2013) and PANI Marins et al 2011;Lee et al 2012;Müller et al 2012;Wang et al 2012a) nanoparticles on the BC surface has been widely reported. In our recent work , the core-sheath-structured PPy/BC nanocomposite membranes were prepared via in situ polymerization of pyrrole and could be directly used as flexible supercapacitor electrodes with a high massspecific capacitance of 459.5 F g -1 at 0.16 A g -1 current density.…”

Three-Dimensional, Chemically Bonded Polypyrrole/Bacterial Cellulose/Graphene Composites for High-Performance Supercapacitors

“…14,15 In these GE-conductive polymer and GEmetal-oxide composites, GE acts as support matrix for the growth of the electroactive species at nanoscale, which results in a larger surface area and further enhances the electrochemical performance by increasing the electrical conductivity and mechanical stability. [16][17][18][19][20][21] The exploitation of GE's potential in pseudocapacitors significantly relies on the composites development to take full advantage of the synergistic effect of GE substrate and the electroactive components, along with morphology optimization of both spatial orientation of GE sheets and other components. [15][16][17][18][19][20][21] Morphology well-controlled composites have been successfully developed through in-situ chemical or electrochemical polymerization, where conducting polymers (ca.…”