کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7737182 | 1497976 | 2014 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of layered cathode material 0.5Li2MnO3·0.5LiMn1/3Ni1/3Co1/3O2 by an improved co-precipitation method for lithium-ion battery
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The layered 0.5Li2MnO3·0.5LiMn1/3Ni1/3Co1/3O2 lithium-rich manganese-based solid solution cathode material has been synthesized by two-step co-precipitation method. X-ray diffraction studies reveal that the as-prepared material has a typical layered structure with R-3m and C2/m space group. The surface morphology of the [Mn4/6Ni1/6Co1/6]CO3 precursor and cathode material 0.5Li2MnO3·0.5LiMn1/3Ni1/3Co1/3O2 have been examined using scanning electron microscopy. Electrochemical performances, including discharge capacity, cycling performance and rate capability also have been investigated. The results show that the cathode material 0.5Li2MnO3·0.5LiMn1/3Ni1/3Co1/3O2 prepared by two-step co-precipitation method has a good electrochemical performance, which can deliver a high initial discharge capacity of 276.70 mAh gâ1 at the current density of 25 mA gâ1. When cycling at 125 mA gâ1, the material indicates an initial discharge capacity of 211.31 mAh gâ1 and 196.64 mAh gâ1 after 50 cycles, capacity retention is 93.06% and its coulombic efficiencies is greater than 98% at each charge/discharge cycling. Furthermore, the as-prepared material 0.5Li2MnO3·0.5LiMn1/3Ni1/3Co1/3O2 also shows an excellent rate capacity.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 256, 15 June 2014, Pages 178-182
Journal: Journal of Power Sources - Volume 256, 15 June 2014, Pages 178-182
نویسندگان
Zhenye Zhu, Linwei Zhu,