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首页> 外文期刊>International Journal of Electrochemical Science >Effect of Temperature on Electrochemical Performance of LiMg0.06Mn1.94O4 Prepared by a Molten-Salt Combustion Method
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Effect of Temperature on Electrochemical Performance of LiMg0.06Mn1.94O4 Prepared by a Molten-Salt Combustion Method

机译：温度对熔盐燃烧法制备的LiMg 0.06 Mn 1.94 O 4 电化学性能的影响

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摘要

LiMg0.06Mn1.94O4 cathode materials were synthesized by a molten-salt combustion method at 400 for 1h and two- step calcination at 500 C, 600 C, 700 C and 800 C for 3h. The temperature effecton the crystal structure and the morphology of LiMg0.06Mn1.94O4 has been evaluated by X-raydiffraction (XRD) analysis and scanning electron microscopy (SEM). The materials synthesized at 600C and 700C were single phase, while Mn2O3 and Mn3O4 impurity phases can be detected in the othermaterials synthesized at 800 C and 900 C, respectively. The average particle size ofLiMg0.06Mn1.94O4 increased with the increase of calcination temperature. The effect of the calcinationtemperature on the electrochemical performances of the LiMg0.06Mn1.94O4 materials has also beenstudied by galvanostatic charge/discharge tests and cyclicvoltammetry (CV) measurements. The resultsshowed that the prepared LiMg0.06Mn1.94O4 at 600 C and 700C demonstrated better electrochemicalperformance than the ones at 500 C and 800C, with an initial discharge specific capacity of 117.7-1 -1 mAh g and 112.8 mAh g , and their capacity retention was 78.2% and 79.3% after 100 cycles at 0.5C, respectively.
机译：LiMg0.06Mn1.94O4正极材料是通过熔融盐燃烧法在400℃下燃烧1小时，然后在500 C，600 C，700 C和800 C下分两步煅烧3小时合成的。通过X射线衍射（XRD）分析和扫描电子显微镜（SEM）评估了温度对LiMg0.06Mn1.94O4晶体结构和形貌的影响。在600℃和700℃下合成的材料是单相，而在800℃和900℃下合成的其他材料中分别可以检测到Mn 2 O 3和Mn 3 O 4杂质相。 LiMg0.06Mn1.94O4的平均粒径随着煅烧温度的升高而增加。煅烧温度对LiMg0.06Mn1.94O4材料的电化学性能的影响也已通过恒流充电/放电测试和循环伏安法（CV）测量进行了研究。结果表明，所制备的LiMg0.06Mn1.94O4在600 C和700 C时的电化学性能优于在500 C和800 C时的电化学性能，其初始放电比容量为117.7-1 -1 mAh g和112.8 mAh g，并且它们的容量保持率在0.5C下进行100次循环后，其分别为78.2％和79.3％。

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