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中文摘要：
有各种各样的 Li/Mn 比率的 Li_(1+x )Mn_(2-y ) O_4 尖晶石被 asolid 状态反应综合。由 X 光检查衍射分析， Li_2MnO_3 与增加 Li/Mn 比率作为第二个阶段被检测；并且在 Li_(1+x )Mn_(2-y ) O_4 尖晶石的 Li_2MnO_3 的角色被讨论。以 0.1 mV/s 的率扫描循环伏安法(CV ) 的 Aslow 被采用描绘 4 V 的进化和 Li_(1+x )Mn_(2-y ) O_4 尖晶石的 5 个 V 高原。在 4V 区域的另外的 Li~+ 插入在 3.95 V 在 Li 缺乏和 Li 富有的尖晶石被观察，它与有弱 Li-Li 相互作用和强壮的 Li-Li 相互作用的一般 Li~+ 插入不同；并且这个高原消失在随后的周期。到 Li~+ 插入和 Li_2MnO_3 的抽取的 4.4 V/3.8 V 高原通信员被讨论，并且这些高原与骑车有高可逆性。5 V 高原仅仅在 Li 富有的样品被发现，并且这个高原有一个趋势与增加 Li/Mn 比率出现在更高的电压区域。
英文摘要：
Li1＋xMn2-yO4 spinels with various Li/Mn ratios were synthesized by a solid-state reaction. By X-ray diffraction analysis, Li2MnO3 was detected as a second phase with increasing the Li/Mn ratio; and the role of Li2MnO3 in Li1＋xMn2-yO4 spinel was discussed. A slow scanning cyclic voltammetry（CV） at the rate of 0.1 mV/s was adopted to characterize the evolutions of 4 V and 5 V plateaus of Li1＋xMn2-yO4 spinels. An additional Li＋ insertion in 4 V region was observed in both Li-lack and Li-rich spinels at 3.95 V, which is different from the general Li^＋ insertion with weak Li-Li interaction and strong Li-Li interaction; and this plateau disappeared in the subsequent cycles. The 4.4 V/3.8 V plateaus correspondent to Li^＋ insertion and extraction of Li2MnO3 were discussed, and these plateaus have a high reversibility with cycling. The 5 V plateau was found only in the Li-rich samples, and this plateau has a tendency to emerge at higher voltage region with increasing Li/Mn ratio.
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