Evaluation of composite-MnO2 as cathode material for rechargeable Li/MnO2 batteries

Composite manganese dioxide is developed from electrochemical manganese dioxide (EMD) and LiOH·H2O in the temperature range 350–450 °C. To evaluate its performance as a cathode material, several experiments were carried out. In AA-size cells, it works for about 100 cycles at 62.5 mAh/g DOD, while about 300 cycles are achieved at 58.3 mAh/g DOD in prototype cells. During discharge, the d values of Li2MnO3 become larger and shift to the low angle area with the insertion of lithium. The characteristics of the crystal lattice structure of the material in the charge process are also given and analyzed with the help of X-ray diffraction patterns.