Preparation and sodium storage properties of CoFe2O4 composite S N co-doped RGO

Abstract

The application value of iron-base binary oxide in sodium-ion batteries has been widely concerned by researchers, and CoFe2O4 has a better development prospect because of its cost efficiency. However, the CoFe2O4 will produce volume expansion during the reaction, resulting in the collapse of the material structure. This paper created the ground-breaking CFO/SNRGO nanocomposite structure by using a microwave approach. This intricate arrangement entails CoFe2O4 nanoparticles firmly adhering to S and N co-doped graphene hybrid nanosheets. The prepared CFO/SNRGO nanocomposite showcased remarkable electrochemical capabilities. Through the uniform integration of CoFe2O4 nanoparticles onto the SNRGO hybrid nanosheets, we managed to minimize the stacking between SNRGO nanosheets and reduce the size of the CoFe2O4 nanoparticles. Additionally, the SNRGO serves as a buffer layer, allowing it to adjust to variations in volume and stop the CoFe2O4 nanoparticles from collapsing while Na+ is being embedded or removed. This cooperative amalgamation of SNRGO and CoFe2O4 contributes to the outstanding electrochemical performance observed in the CFO/SNRGO nanocomposites. After 200 cycles at an electrical concentration of 0.05 A g−1, the CFO/SNRGO nanotechnology demonstrated a notable 357.3 mAh g−1 bidirectional ability. and sustained excellent rate performance. Even when subjected to an increased electrical concentration of 1.5 A g−1, the reversible capacity remained steady at 174 mAh g−1. These impressive outcomes are due to the robust coupling between the CoFe2O4 nanoparticles and SNRGO within the nanocomposites.