Facile Synthesis of Flower‐Like MnCo₂O₄@PANi‐rGO: A High‐Performance Anode Material for Lithium‐Ion Batteries

Abstract

Flower‐like MnCo2O4 was prepared in a self‐assembly process and used in the formation of MnCo2O4@polyaniline (MnCo2O4@PANi) that proceeds by a simple in situ polymerization. The MnCo2O4@PANi‐reduced graphite oxide (MnCo2O4@PANi‐rGO) composite was then synthesized by introducing rGO into MnCo2O4@PANi. This modification improves the overall electronic conductivity of the MnCo2O4@PANi‐rGO because of the dual conductive functions of rGO and PANi; it also provides a buffer for the changes in electrode volume during cycling, thus improving the lithium‐storage performance of MnCo2O4@PANi‐rGO. The electrochemical performance of the samples was evaluated by charge/discharge cycling testing, cyclic voltammetry, and electrochemical impedance spectroscopy. MnCo2O4@PANi‐rGO delivers a discharge capacity of 745 mAh g−1 and a Coulombic efficiency of 100 % after 1050 cycles at a current density of 500 mA g−1, and is a promising anode material for lithium‐ion batteries.

Multifunctional spinel MnCo2O4 based materials for energy storage and conversion: a review on emerging trends, recent developments and future perspectives

“…Fan et al 142 reported the synthesis of MnCo 2 O 4 /rGO composites with an initial discharge capacity of 1657 mA h g −1 at a current density of 0.1 A g −1 , and a reversible capacity of 791 mA h g −1 at 0.2 A g −1 for 100 cycles. A MnCo 2 O 4 @PANi-rGO composite was also synthesized by Huang et al , 143 with a discharge capacity of 745 mA h g −1 and a coulombic efficiency of 100% after 1050 cycles at a current density of 500 mA g −1 .…”