Electrochemical performance of Bi₂Te₃/GO composite anode for LIB application

Abstract

Present investigation deals with the study of electrochemical properties of Bi 2 Te 3 / GO composite for its use as anode material in Li-ion batteries. The Bi 2 Te 3 /GO composite has been synthesized via polyol route. The surface morphology and structural properties of the as-prepared samples have been studied by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and Raman spectroscopy techniques. The phase of as-synthesized composite was found out to be rhombohedral as has been characterized by X-ray diffractometer. The presence of GO in the Bi 2 Te 3 matrix has been confirmed by the presence of characteristic D and G bands in the Raman spectra. The as-synthesized composite showed the first cycle discharge/charge capacity of 752/514 mAh g −1 at the current density of 0.1 Ag −1 , superior rate capability (~50 mAh g −1 at 2 Ag −1 ), and excellent cycling stability over 500 cycles at 0.1 Ag −1 . The presence of GO in the matrix helps to enhance the electronic conductivity due to the rapid Li-ion diffusion and helps to shield the changes in volume during the cycling processes.

Implementation of Bismuth Chalcogenides as an Efficient Anode: A Journey from Conventional Liquid Electrolyte to an All-Solid-State Li-Ion Battery

“…Tu et al prepared Bi2Te3 nanoplates and graphene nanocomposites to provide a higher electrical conductivity to graphite to enhance the electrochemical performance [78]. Graphene is a monolayer of sp 2 -bonded To enhance the cyclic stability of Bi 2 Te 3 , Masood et al prepared Bi 2 Te 3 and graphene oxide (GO) composites [31]. The adopted method for synthesis was the polyol method, which signified the distribution of Bi 2 Te 3 into the GO matrix.…”

“…To enhance the cyclic stability of Bi 2 Te 3 , Masood et al prepared Bi 2 Te 3 and graphene oxide (GO) composites [ 31 ]. The adopted method for synthesis was the polyol method, which signified the distribution of Bi 2 Te 3 into the GO matrix.…”

“…The development of alternative anode materials for Li-ion batteries is continuously in progress to satisfy the industrial requirements. Bi and their chalcogenides are promising anodes for Li-ion batteries owing to their high volumetric energy density [29][30][31]. Bismuth (Bi) and its binary chalcogenides (Bi 2 X 3 , X = Te, Se, and S) are known for their various applications like thermoelectric [32][33][34], sensors [35], photodetectors [36][37][38], photoelectrochemical sensors [39,40], etc.…”