Facile synthesis of Mn2O3/Mn3O4 composites with superior zinc ion storage performance

Mn2O3/Mn3O4 composites are synthesized by a facile thermal decomposition strategy with MnCl2 center dot 4H(2)O and sucrose as raw materials. The addition of sucrose induces the phase structure of manganese oxides to transform from single Mn2O3 into Mn2O3/Mn3O4 composites, reduction of particle size, and much-enhanced zinc storage performances. The Mn2O3/Mn3O4 sample (MO-1.0) prepared with the Mn2+/sucrose molar ratio of 1:1 exhibits the best zinc storage performances, delivering a high specific capacity of 345 mA h g(-1) at 200 mA g(-1) after 120 discharge/charge cycles and 122 mA h g(-1) at 1000 mA g(-1) after 1000 discharge/charge cycles. At the current density of 2000 mA g(-1), it also delivers a high specific capacity of 143.3 mA h g(-1). The present work offers a facile and cost-efficient method for preparing high-performance Mn2O3/Mn3O4 composite cathode materials of ZIBs.

Automated summary

Mn2O3/Mn3O4 composites are synthesized by a facile thermal decomposition strategy using MnCl2 center dot 4H(2)O and sucrose as raw materials. The addition of sucrose transforms the phase structure of manganese oxides from single Mn2O3 to Mn2O3/Mn3O4 composites, reduces particle size, and enhances zinc storage performances. The Mn2O3/Mn3O4 sample (MO-1.0) prepared with a Mn2+/sucrose molar ratio of 1:1 exhibits the best zinc storage performances, delivering high specific capacities at different current densities. This study provides a simple and cost-efficient method for preparing high-performance Mn2O3/Mn3O4 composite cathode materials for ZIBs.