Na0.44MnO2 nanorods were prepared from KMnO4

MnSO4 and NaOH as initial raw materials by hydrothermal soft chemical method. XRD confirmed that the products have S-shaped channel structure

and TEM characterization indicates that Na0.44MnO2 nanorods is single-crystal structure

which can be suited for preparation of high performance cathode material. Graphene prepared by hummer method were used as conductive agent. Electrochemical test research shows that the capacity

cycle and rate performance of Na0.44MnO2 nanorods/graphene are improved with the increase of the amount of graphene. When the content of graphene reached to 45%

the capacity of electrode is up to 192.5 mAh·g-1 at the current density of 0.1 A·g-1. In the rate test

the capacity of electrode is still located at 123.4 mAh·g-1 at the current density of 2.0 A·g-1

and it indicates that these electrode materials have potential application in the next generation of advanced batteries.