Mn_3O_4 nanorods with secondary plate-like nanostructures; preparation, characterization and application as high performance electrode material in supercapacitors

摘要

Mn_3O_4 nanorods with secondary plate-like structures were prepared through precipitation from a 0.005 M manganese chloride bath, under the applying direct current mode (i = 2 mA cm~(-2)). The structural analysis through XRD and FTIR confirmed that the deposited nanopowder has pure monoclinic phase of Mn_3O_4. Further morphological assessment through SEM proved the product to have the Mn_3O_4 nanorods in large quantity, which constructed the secondary plate-like building blocks. Cyclic voltammetric and charge-discharge experiments on the product indicated the prepared Mn_3O_4 to possess high specific capacitance (SC) values of 298 F g~(-1), as well as an outstandingly durable cycling stability (95.1 % of initial capacity after discharging 1000 cycles).