The novel electrode material with NixB/RGO composite for enhanced rechargeable batteries

Abstract

Rechargeable lithium ion batteries (LIBs) have dominated many portable devices due to their high theoretical energy density and good cycle life. Nevertheless, LIBs require higher energy density and stability for power electrical vehicles (EVs). To achieve higher energy density in LIBs, lithiumsulfur (Li-S) batteries with a high theoretical capacity up to 1672mAh/g are receiving considerable interest. However, practical applications of Li-S batteries still have barriers such as poor electronic conductivity and dissolution of polysulfide during charge/discharge process that bring about fast capacity decay and poor cycle performance. A variety of strategies such as combination with conductive materials and composing sulfur with support materials have been devoted to overcome aforementioned drawbacks. Herein, we successfully synthesized the novel NixB/RGO composites as host materials through a simple solution-based synthetic route. The morphology and chemical composition of newly synthesized material was successfully analyzed by SEM, TEM, XRD, and EDS mapping. In addition, the effect of NixB/RGO was characterized by electrochemical analysis and it exhibits enhanced reversible capacity property in the application to Li-S batteries.