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首页> 外文期刊>Electrochimica Acta >Molten salt synthesis of LiNi{sub}0.5Mn{sub}1.5O{sub}4 spinel for 5 V class cathode material of Li-ion secondary battery
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Molten salt synthesis of LiNi{sub}0.5Mn{sub}1.5O{sub}4 spinel for 5 V class cathode material of Li-ion secondary battery

机译：锂离子二次电池5V级正极材料LiNi {sub} 0.5Mn {sub} 1.5O {sub} 4尖晶石的熔融盐合成

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摘要

Well-ordered high crystalline LiNi{sub}0.5Mn{sub}1.5O{sub}4 spinel has been readily synthesized by a molten salt method using a mixture of LiCl and LiOH salts. Synthetic variables on the synthesis of LiNi{sub}0.5Mn{sub}1.5O{sub}4, such as synthetic atmosphere, LiCl salt amount, synthetic temperature, and synthetic time, were intensively investigated. X-ray diffraction (XRD) patterns and scanning electron microscopic (SEM) images showed that LiNi{sub}0.5Mn{sub}1.5O{sub}4 synthesized at 900 and 950℃ have cubic spinel structure (Fd3{top}-m) with clear octahedral dimension. LiNi{sub}0.5Mn{sub}1.5O{sub}4 spinel phase began to decompose at around 1000℃ accompanied with structural and morphological degradation. LiNi{sub}0.5Mn{sub}1.5O{sub}4 powders synthesized at 900℃ for 3 h delivered an initial discharge capacity of 139 mAh/g with excellent capacity retention rate more than 99% after 50 cycles.
机译：通过使用LiCl和LiOH盐的混合物的熔融盐法很容易合成出有序的高结晶LiNi {sub} 0.5Mn {sub} 1.5O {sub} 4尖晶石。深入研究了LiNi {sub} 0.5Mn {sub} 1.5O {sub} 4的合成变量，如合成气氛，LiCl盐量，合成温度和合成时间。 X射线衍射（XRD）图谱和扫描电子显微镜（SEM）图像表明，在900和950℃下合成的LiNi {sub} 0.5Mn {sub} 1.5O {sub} 4具有立方尖晶石结构（Fd3 {top} -m ），并具有清晰的八面体尺寸。 LiNi {sub} 0.5Mn {sub} 1.5O {sub} 4尖晶石相在1000℃左右开始分解，并伴随结构和形态的降解。 LiNi {sub} 0.5Mn {sub} 1.5O {sub} 4粉末在900℃下合成3 h，经过50次循环，初始放电容量为139 mAh / g，优异的容量保持率达99％以上。

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