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首页> 外文期刊>International Journal of Electrochemical Science >The Synthesis and Electrochemical Property of Spinel Cathode Material Li1.05[(Mn1.99Gd0.01)0.91(Mn1.8Co0.2)0.09]O4 for Lithium- Ion Batteries
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The Synthesis and Electrochemical Property of Spinel Cathode Material Li1.05[(Mn1.99Gd0.01)0.91(Mn1.8Co0.2)0.09]O4 for Lithium- Ion Batteries

机译：尖晶石型正极材料Li 1.05 [（Mn 1.99 Gd 0.01 ） 0.91 （Mn < sub> 1.8 Co 0.2 ） 0.09 ] O 4 用于锂离子电池

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摘要

Novel spinel Li1.05[(Mn1.99Gd0.01)0.91(Mn1.8Co0.2)0.09]O4 as cathode material for Li-ion battery was prepared through two-step solid-state reaction and treatment by Li-Mn-Co-O material on the surface of Li1.05[Mn1.99Gd0.01]O4 particles. The physical and electrochemical properties of the materials were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), cyclic voltammetry (CV) and charge-discharge test. The novel material showed improved electrochemical properties compared with the pristine LiMn2O4, especially at elevated temperature. The initial discharge capacity of the -1 Li1.05[(Mn1.99Gd0.01)0.91(Mn1.8Co0.2)0.09]O4 was 128.0 mAh g with a fading rate of 0.041% per cycle at 25°C. Moreover, the cycle ability was improved more evidently at 55°C, the retentions ratio of capacity was up to 91% for the novel material after 100 cycles.
机译：通过两步固相反应和Li-Mn-Co处理制备了新型尖晶石Li1.05 [（Mn1.99Gd0.01）0.91（Mn1.8Co0.2）0.09] O4作为锂离子电池正极材料Li1.05 [Mn1.99Gd0.01] O4颗粒表面的-O材料。通过X射线衍射（XRD），扫描电子显微镜（SEM），循环伏安法（CV）和充放电测试分析了材料的物理和电化学性能。与原始LiMn2O4相比，该新型材料显示出改善的电化学性能，尤其是在高温下。 -1 Li1.05 [（Mn1.99Gd0.01）0.91（Mn1.8Co0.2）0.09] O4的初始放电容量为128.0 mAh g，在25°C下每个循环的褪色率为0.041％。而且，在55℃下，循环能力得到了更明显的改善，新材料经过100次循环后的容量保持率高达91％。

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