Preparation, Characterization and Electrochemical Lithium Insertion Into the New Organic–Inorganic Poly(3,4‐Ethylene Dioxythiophene)/V₂O₅Hybrid

Abstract

Poly(3,4-ethylene dioxythiophene) (PEDOT) has been inserted between the layers of crystallineV2O5via the in situ polymerization of EDOT within the framework of the oxyde. The insertion increases the bidimensionality of theV2O5host by the layer separation but results in a random layer stacking structure, leading to broadening of the energy state distribution. According to electrochemical measurements, the hybrids showed reversible specific capacities up to∼330mAh/g at 15mA/g between 2 and 4.4V vs.Li+/Li.

Electrochemical Impedance Analysis of V2O5 and PEDOT Composite Film Cathodes

“…In the IR spectra shown in Figure 1, the characteristic peaks of PEDOT and V 2 O 5 in the composite films appear. As indicated in the IR spectra of the nanobeam‐V 2 O 5 /PEDOT composites, the three main vibration bands of V 2 O 5 clearly appear at about 1020, 850, and 525 cm −1 corresponding to the terminal oxygen symmetric stretching mode ( v s ) of VO, the bridge oxygen asymmetricstretching mode ( v as ) of VOV, and symmetric stretching mode ( v s ) of VOV, respectively 4, 8. Also, the characteristic bands of PEDOT in the spectra confirm the presence of PEDOT in the composites 8.…”

“…The conductive polymer, poly‐3,4‐ethylenedioxythiophene (PEDOT), is one of the most successful conjugated conductive polymers. Recent improvements in the characteristics of PEDOT have led to its actual usage in various electronic devices and it has become an excellent candidate for making composite films with inorganic nanostructures 8–11. The high redox potential of PEDOT allows it to be used as a cathode material in Li‐batteries.…”

Microwave-assisted hydrothermal synthesis and characterization of tremella-like polyaniline–vanadium oxide nanocomposite nanosheets

“…inorganic host, that is auto-recovery of V 5+ from V 4+ , and the postpolymerization of the organic intercalate [1,17,18].…”

Vanadium-oxide-based electrode materials for Li-ion batteries

“…The weight loss between 150 °C and 400 °C was ascribed to the decomposition of the ethylenedioxy groups of the PEDOT. [197] The loss after 400 °C was caused by the combustion of polymer components. The TGA curve of VC5P10 combined all features of both VC5 and VP10.…”

“…[187] Therefore, designing hybrid composites of V2O5 with conducting polymers can realize great improvements in the battery performance of V2O5 for LIBs. There are three conducting polymers widely used in developing V2O5-based cathode materials, such as polypyrrole (PPy), [188][189][190][191] polyaniline (PANI), [192][193][194] and polythiophene, [195][196][197][198] The easy synthesis and the commercial availability of both polymers and monomers are the driving forces for the extensive research on these conducting polymers.…”