A Low-Temperature Synthetic Route and Electrochemical Properties of Micrometer-Sized LiNi0.5Mn1.5O4 Single Crystals
A Low-Temperature Synthetic Route and Electrochemical Properties of Micrometer-Sized LiNi0.5Mn1.5O4 Single Crystals
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DOI：
10.1149/1.2171812
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发表时间：
2006-04
影响因子：
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通讯作者：
Yasuhiko Takahashi;H. Sasaoka;R. Kuzuo;N. Kijima;J. Akimoto
中科院分区：
文献类型：
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作者：
Yasuhiko Takahashi;H. Sasaoka;R. Kuzuo;N. Kijima;J. Akimoto
通过在650℃和700℃相对较低的温度下加热LiOH、MnCl₂和NiCl₂的化学计量混合物，合成了微米级的LiNi₀.₅Mn₁.₅O₄单晶。X射线衍射（XRD）图谱和扫描电子显微镜（SEM）图像表明，在650℃和700℃合成的LiNi₀.₅Mn₁.₅O₄具有立方尖晶石结构，且呈现出良好的八面体形状。Li/LiNi₀.₅Mn₁.₅O₄电池的电化学测量显示出良好的充放电性能，在4.95 - 3.00 V之间的初始放电容量为130 mAh g⁻¹。倍率性能测试表明，在700℃合成的样品从C/5倍率到3C倍率时保持其容量的97%。
Micrometer-sized LiNi 0.5 Mn 1.5 O 4 single crystals were synthesized by heating a stoichiometric mixture of LiOH, MnCl 2 , and NiCl 2 at the relatively low temperatures of 650 and 700°C. X-ray diffraction (XRD) patterns and scanning electron microscopic (SEM) images showed that LiNi 0.5 Mn 1.5 O 4 synthesized at 650 and 700°C has cubic spinel structure with well-formed octahedral shapes. The electrochemical measurements for the Li/LiNi 0.5 Mn 1.5 O 4 cell showed good charge-discharge performance with an initial discharge capacity of 130 mAh g -1 between 4.95 and 3.00 V. The rate capability test revealed that the sample synthesized at 700°C retains 97% of its capacity in going from C/5 to the 3C rate.