Synthesis and Characterization of Nanostructured Electrode Materials for Li and Mg Ion Battery Application

Abstract

In this report, a novel procedure to synthesize nanostructured electrode materials for newlinelithium-ion batteries and suitable spinel electrode materials for magnesium ion batteries has newlinebeen reported. This report has been divided into two parts. The first part focuses on two newlinedifferent electrode materials: one is olivine cathode, and the other is carbon anode. Among newlinecathodes, lithium iron phosphate (LFP) is one of the most prominent cathode materials for newlinelithium-ion batteries, and carbon coating of the LFP nanoparticle is one of the critical and newlineexpensive processes. A natural porous fiber material, Bombyx mori silk cocoon, has been used newlineto obtain uniform carbon coating on LFP nanoparticles without the use of any expensive newlinepolymer material. And a 2D carbon electrode was also prepared with the help of carbonized newlinekapok fiber silk (KFCS). It is one of the simplest processes to prepare 2D carbon sheets. The newlineelectrochemical properties of LFP carbonized silk (LFP-CS) shows a capacity of 163mAh/g at newline0.1C rate and retain a capacity of 140 mAh/g at 1 C rate after 200 cycles. KFCS material newlineexhibited electrochemical property of 465mAh/g after 50 cycles at 0.1 C rate and 239mAh/g newlineat 1C rate. Both materials showed very good results, and the materials prepared for carbon newlinecoating or preparation of carbon sheet does not involve any polymer materials. newlineThe other part of this report concentrates on developing and testing materials as cathode newlineand anode for Magnesium ion batteries (MIBs). MgFe2O4 and MnFe2O4 materials were newlineprepared by solvothermal and supercritical fluid processes, respectively. The MgFe2O4 newlinematerial prepared by the solvothermal process exhibited promising results as a cathode for newlineMIBs. The electrochemical study reveals that at 0.1C rate the material exhibited a capacity of newline52mAh/g and at higher C rates the material capacity deteriorated, which might be due to the newlineMg2+ ion, This can be indicated towards the surface reaction on cathode or electrolyte newlinedecomposition due to large volume expansion-contraction i