| S掺杂LiMn2O4尖晶石的合成与性能 |
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| 引用本文： | 夏君磊,夏君旨,刘韩星.S掺杂LiMn2O4尖晶石的合成与性能[J].材料导报,2003,17(Z1):253-255. |
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| 作者姓名： | 夏君磊 夏君旨 刘韩星 |
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| 作者单位： | 1. 武汉理工大学材料复合新技术国家重点实验室,武汉,430070
2. 唐山工业职业技术学院,唐山,063000 |
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| 基金项目： | 国家自然科学基金，59972026， |
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| 摘 要： | 分别用溶胶-凝胶法和固相法合成了锂离子电池正极材料LiMn2O4-xSx,在掺S量x＞0.04时,两种方法都不能获得纯的立方尖晶石相.LiMn2O4-xSx电化学性能测试结果表明,S掺杂对LiMn2O4的4V区性能没有明显的改善,但是在3V区具有良好的循环性能,30次循环后容量不但没有衰减而且有一定的增加.S掺杂对LiMn2O4在3V区的改善作用为扩大材料的工作电压范围、提高材料的初始容量提供了一条可能的途径.
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| 关 键 词： | 锂离子电池 正极材料 LiMn2O4-xSx |
Synthesis and Performance of S-doped LiMn2O4 |
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| XIA Junlei XIA Junzhi LIU Hanxing.Synthesis and Performance of S-doped LiMn2O4[J].Materials Review,2003,17(Z1):253-255. |
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| Authors: | XIA Junlei XIA Junzhi LIU Hanxing |
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| Abstract: | LiMn2O4-xSx was synthesized separately by solid method and sol-gel method, the results of which, indicate that when x>0. 04 the single cubic spinel phase can not be synthesized by either method. S-doping can not improve the performance of LiMn2O4 in the 4V region but can give LiMn2O4-xS, a good cyclability in 3V region. The capacity increases instead of decreasing after 30 cycles in 3V region. S-doping can not improve the overall performance of LiMn2O4,but it offers a possible method to extend the charge/discharge voltage region and elevate the capacity. |
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| Keywords: | Li-ion battery cathode material LiMn_2O_(4-x)S_x |
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