Ultrafine β-FeOOH: the Influence of Synthesis Conditions on the Morphological, Magnetic and Electrochemical Properties

Abstract

Ultrafine sol-gel synthesized iron oxy-hydroxides -FeOOH was investigated by XRD, TEM, Mossbauer and impedance spectroscopies and low temperature nitrogen adsorption. The influence of precursor molar concentration on the material morphology, crystalline and magnetic microstructures was studied. The model of initial precursors (FeCl36H2O) molarity influence on the mesoporous -FeOOH formation is proposed. The electrochemistry performance of obtained materials in aqueous electrolyte (1 M Li2SO4) was tested and lithium ions diffusion coefficients were calculated. The work is aimed to identify the optimal conditions for obtaining the perspective electrode material for supercapacitors.