Synthesis and Performance of Nano Phase α-MnO_2

A nano-grade α-MnO2 was prepared by a sol-gel method. The optimum condition to form α-MnO2 was discussed. The measurements such as XRD, TG, SEM, ICP, TEM, chemical analysis, constant current discharge, cyclic voltammetry test, were performed and compared with that of I.C.No.1 (international common MnO2 sample No.IEMD). Although the discharge performance of the nano-grade α-MnO2 is not better, the discharge capacity of the nano-grade a-MnO2 mixed with I.C.No.1 at a certain weight ratio is higher than that of I.C.No.1 in shallow and deep discharge stages.