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.

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

Layered manganese dioxide nanoflowers with Cu2+and Bi3+ intercalation as high-performance cathode for aqueous zinc-ion battery.

Rechargeable aqueous zinc ion battery (ZIB) is reviving as a promising energy storage device with respect to its distinguished safeness, cost-effectiveness, and eco-friendliness. However, its practical application is still challenged...

Electrochemical reaction behavior of MnS in aqueous zinc ion battery

Although zinc-ion batteries are regarded as important alternatives for Li-ion batteries, the dendrite issues and side reactions are major obstacles for their development. Here, inspired by the idea of electrolyte modification, a simple and low-cost approach, that methanol is used as additive into Zn2+-containing electrolyte for long-life Zn ion batteries, was developed. Methanol can mix with water in any ratio through the formation of hydrogen bonds, which participates in the solvation shell of Zn2+ ion in a manner of forming the [Zn(OH2)x(CH3OH)y]2+ cations. The interaction between Zn2+, methanol and water can effectively suppress the side reactions. As a result, Zn/Zn symmetric cell shows a long-term stability for over 480 h at 1 mA cm−2 with 1 mAh cm−2. In addition, full battery based on the MnO2 cathode exhibits an improved capacity retention after 100 cycles at 0.1 A g−1 and an excellent electrochemical performance at low temperature. 

Electrolyte Modification for Long‐Life Zn Ion Batteries: Achieved by Methanol Additive

Spreading the full spectrum of layer-structured compounds for kinetics-enhanced aqueous multivalent metal-ion batteries

Copper-doped manganese tetroxide composites with excellent electrochemical performance for aqueous zinc-ion batteries

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Copper-doped manganese tetroxide composites with excellent electrochemical performance for aqueous zinc-ion batteries