Preparation of High Capacity Porous Mn3O4/rGO Composite Materials by Hydrogen Reduction
Mn3O4 has abundant resources,a stable structure,and high theoretical capacitance,making it a promising supercapacitor material.However,the poor conductivity hinders its application in this field.In this work,solid-form ε-MnO2 micron powders and hydrophilic GO powders were used as raw materials to prepare MnO2/GO composite powders with good contact by magnetic stirring and freeze drying in deionized water.Then,through a one-step hydrogen reduction treatment,the solid ε-MnO2 and GO were synchronously converted into porous Mn3O4 and rGO with nanoporous structures,thereby obtaining high-performance Mn3O4/rGO composite powders with uniform dispersion,high specific surface area,and excellent conductivity.The electrochemical test showed that the specific capacitance of Mn3O4/rGO composite powder is 25.2 F/g at the scanning rate of 2 mV/s,and it has a good capacitance retention rate.
NETL
NSTL
万方数据
