Integration of Hexacyanoferrate as an Active Species in a Molecular Hybrid Material. Transport Properties and Application of Polyaniline/Hexacyanoferrate as a Cathode in Rechargeable Lithium Batteries

Abstract

The hybrid organic−inorganic material formed by polyaniline and the hexacyanoferrate anion (PAni/HCF) constitutes a molecular hybrid where the anchoring of the electroactive anion within the polymer leads to its application as a functional material that harnesses the activity of the molecular species. Transport measurements of the hybrid have been carried out, both by cyclic voltammetry at different scan rates and ac impedance spectroscopy. An apparent diffusion coefficient of 5 × 10-8 cm2/s and an activation energy of 15.5 kJ/mol (0.16 eV) have been obtained. The particular application of these hybrids to energy storage is shown here through their use as cathodes in lithium rechargeable cells. In this respect, the PAni/HCF hybrids show very good cyclabilities and high specific charges of up to 140 A·h/kg, unprecedented for this type of hybrid materials.

Recent advances in conjugated polymer energy storage

“…69,71,72 Low capacities can be mitigated to a limited extent through choice of dopant ion, electrolyte, or polymer structure. 69,[73][74][75][76][77][78] There is evidence that strong interactions between the highly charged or doped conjugated polymer and a complementary polyion can serve to stabilize highly oxidized conjugated polymers. 79 Deficiencies associated with oxidative stability over many charge cycles have seen improvements with select composite materials such as graphene or carbon nanotubes.…”

Electrostatic assembly of polyaniline and platinum-poly(amidoamine) dendrimers hybrid nanocomposite multilayer, and its electrocatalysis towards CO and O2

“…It is derived mainly from its promising applications in sensors [1][2][3][4][5], electrochromic materials [6,7], photovoltaic devices [8], rechargeable battery [9], etc. In general, electropolymerization [10] and spinning/dip-casting methods [11,12] are used to fabricate PANI films.…”

Capacitive characteristics of nanocomposites of conducting polypyrrole and functionalized carbon nanotubes: pulse current synthesis and tailoring

“…The ultrafast charging/discharging ability of PCD PPy-TOS/FSWNT composites can be explained by Eq. (1) [34]:…”