中文摘要：

常压回流法制备掺杂钴离子的钙锰矿，X-射线衍射（XRD）、热重（TG）、化学分析等测试表明：钙锰矿均为单一相，组成为MgxCoyMnOz·nH2O，其中0．18≤x≤0．22、0≤y≤0．24、2．10≤z≤2·53、0.35≤n≤0．73．以掺钻钙锰矿作锂离子二次电池正极材料，组成为T0d-Co10％（10％Co的Mg 0.18Co0.12MnO2．19·0．45H2O）电极放电性能最佳，其首次放电比容量为219mAh／g，100次循环充放电仍有102mAh／g．对比之下，未掺钴的Tod．Co0％电极（钙锰矿）首次放电比容量为211mAh／g，30次循环后为37mAh／g．

英文摘要：

Cobalt-doped todorokites were prepared by refluxing at atmospheric pressure, and then charactered by X-ray diffraction （XRD） , thermogravimetry （TG） and the analysis of chemical compositions. These measurements showed that all of the refluxing products were single phase of todorokites and the structure formulas were Mg, CoyMnOx.nH2O,where 0.18 ≤ x≤ 0.22, 0≤ y ≤ 0.24, 2.10 ≤z ≤2.53, and 0.35 ≤ n ≤0.73. The electrochemical characteristics of cobalt-doped todorokites were examined as lithium insertion hosts for cathodes in rechargeable lithium batteries. The first discharge capacity of undoped todorokite electrode was 211 mAh/ g and the discharge capacity became 37 mAh/g after 30 cycles. The Mg0.18Co0.12Mn02.19·0.45 H20 with doping Co 10% displayed the best discharge behavior, which showed a high discharge capacity of 219 mAh/g at first cycle and the cycling capacity of 102 mAh/g after 100 cycles.