Mn3O4-Graphene Hybrid as a High Capacity Anode Material for Lithium Ion Batteries

TL;DR

This paper presents a novel Mn3O4-graphene hybrid material with high capacity and stability for lithium-ion battery anodes, achieved through a two-step solution process that enhances electrical connectivity and performance.

Contribution

The study introduces a new synthesis method for Mn3O4-graphene hybrids that improves capacity, rate capability, and cycling stability for battery applications.

Findings

High specific capacity of ~900 mAh/g near theoretical limit

Good rate capability and cycling stability

Effective growth of Mn3O4 on graphene enhances electrical connectivity

Abstract

We developed two-step solution-phase reactions to form hybrid materials of Mn3O4 nanoparticles on reduced graphene oxide (RGO) sheets for lithium ion battery applications. Mn3O4 nanoparticles grown selectively on RGO sheets over free particle growth in solution allowed for the electrically insulating Mn3O4 nanoparticles wired up to a current collector through the underlying conducting graphene network. The Mn3O4 nanoparticles formed on RGO show a high specific capacity up to ~900mAh/g near its theoretical capacity with good rate capability and cycling stability, owing to the intimate interactions between the graphene substrates and the Mn3O4 nanoparticles grown atop. The Mn3O4/RGO hybrid could be a promising candidate material for high-capacity, low-cost, and environmentally friendly anode for lithium ion batteries. Our growth-on-graphene approach should offer a new technique for design and synthesis of battery electrodes based on highly insulating materials.