Electrochemical energy storage by polyaniline nanofibers: high gravity assisted oxidative polymerization vs. rapid mixing chemical oxidative polymerization

Abstract

Polyaniline (PANI) nanofibers prepared by high gravity chemical oxidative polymerization in a rotating packed bed (RPB) have demonstrated a much higher specific capacitance of 667.6 F g(-1) than 375.9 F g(-1) of the nanofibers produced by a stirred tank reactor (STR) at a gravimetric current of 10 A g(-1). Meanwhile, the cycling stability of the electrode is 62.2 and 65.9% for the nanofibers from RPB and STR after 500 cycles, respectively.

Preparation and application of polyaniline nanofibers: an overview

“…Moreover, PANI nanofibers prepared at aniline concentrations of 48 mmol L −1 in alkaline medium and 0.2 mol L −1 in acidic medium exhibit the best electrochemical performance among all PANI products, owing to relatively small diameter, high degree of doping, long conjugated length, high crystallinity and high conductivity. The largest specific capacitance is about 857.2 F g −1 at a scan rate of 5 mV s −1 in 1.0 mol L −1 H 2 SO 4 aqueous solution, larger than those for PANI nanofibers prepared by high‐gravity chemical oxidative polymerization or interfacial polymerization . Furthermore, its specific capacitance still retains 63.8% of the initial value after 500 cycles.…”

Flexible hollow nanofibers: Novel one-pot electrospinning construction, structure and tunable luminescence–electricity–magnetism trifunctionality

“…Wang et al [31] prepared Fe 2 O 3 /[Eu(DBM) 3 (Bath)] (DBM = dibenzoylmethanate, Bath = bathophenanthroline)/PVP m agnetic-photoluminescent bifunctional composite nanofibers. Polyaniline (PANI) is one of the most important conducting polymers due to its high conductivity, good processibility and environmental stability, as well as its potential for a variety of applications [32][33][34][35][36][37][38][39][40][41]. Huang et al [42] synthesized Fe 3 O 4 /PANI composite nanofibers via micro-emulsion polymerization of aniline in the presence of Fe 3 O 4 NPs.…”

Freestanding CNT–WO3hybrid electrodes for flexible asymmetric supercapacitors

“…1 SCs can be classied into two different kinds according to their charge storage mechanisms: electrical double-layer capacitors (EDLCs) and pseudocapacitors. [5][6][7][8][9][10][11][12][13][14] CNTs, owing to their outstanding conductive ability and good capacitive performance, have been studied for a long time and applied in various elds involving exible electronic and energy storage. [2][3][4] Pseudocapacitors, however, based on a fast redox reaction, commonly consisting of diverse transition metal oxides such as ruthenium oxide (RuO 2 ), manganese oxide (MnO 2 ) and tungsten oxide (WO 3 ) or conducting polymers like polypyrrole (PPy) and polyaniline (PANI), exhibit higher specic capacitance.…”