Synthesis of Nanoflakes-like Bi2Se3@rGO composite and study on electrochemistry properties for high performance as the anode in lithium ion batteries

Abstract

Metal selenides have gained attention as alternative anode materials for lithium-ion batteries, with increasing demand for electro-vehicles and appliances. Bismuth selenide has significant potential as anode materials in lithium-ion batteries. Nevertheless, metal selenides have essential drawbacks, such as volume expansion and poor cycle performance. In this paper, bismuth selenide synthesized homogeneous morphology-like nanoflakes (NFs) using the wet chemical method. We combined these nanoflakes with reduced graphene oxide to improve their structural stability. The Bi2Se3-NFs@rGO composite showed enhanced specific capacity from 750 mAhg- 1 to 1100 mAhg- 1 at 100 mAg-1. Furthermore, at a current density of 500 mAg-1, it reached a specific capacity (819 mAhg- 1) after 300 cycles and demonstrated a coulombic efficiency of 96 %.