Research of Zn---Mn spinel electrode material for aqueous secondary batteries

Zn---Mn complex oxides have been prepared by the organic acid complex method. X-ray diffraction (XRD) analyses show that the major product is a Zn---Mn spinel phase. The capacity of the sample is above 200 mAh g−1 on cycling in aqueous LiOH electrolyte, but deep-discharge has great influence on the cycling property of the sample. XRD analysis shows that Li+ ions are intercalated into and extracted from the Zn---Mn spinel lattice during the discharge and charge process.