Pine-Fiber-Derived Carbon@MnO@rGO as Advanced Anodes for Improving Lithium Storage Properties

Abstract

Fiber carbon (FC) is a potential fast-chargeable anode, which is attributable to the many nanopores in the cell wall. Herein, a strategy for an FC@MnO@rGO composite is proposed to combine pine-based FCs with suitable MnO nanoparticles, which are enfolded by the reduced graphene oxide (rGO). The magic conception is performed to join the advantages of conductive FC skeleton, high theoretical capacity of MnO and high flexibility and conductivity of rGO. Compared to FC, FC@MnO@rGO composite materials have presented superior lithium storage properties, exhibiting an initial discharge capacity of 1191.8 mAh g−1 and charge capacity of 643.5 mAh g−1. It is worth attention that the FC@MnO@rGO shows a reversible capacity of 304.2 mAh g−1 at a current density of 2 A g−1. Furthermore, it delivers an improved capacity retention of 67% at 400 mA g−1 over 400 cycles.