Zn-Mn complex oxides have been prepared by the organic acid complex me
thod. 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 Lion electrolyte, but deep-discharge has great
influence on the cycling property of the sample. XRD analysis shows t
hat Li+ ions are intercalated into and extracted from the Zn-Mn spinel
lattice during the discharge and charge process.