کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1295948 1498306 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High capacity spherical Li[Li0.24Mn0.55Co0.14Ni0.07]O2 cathode material for lithium ion batteries
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
High capacity spherical Li[Li0.24Mn0.55Co0.14Ni0.07]O2 cathode material for lithium ion batteries
چکیده انگلیسی

Li[Li0.24Mn0.55Co0.14Ni0.07]O2 cathode materials with controlled spherical morphology and particle size in the range of 5–10 μm were synthesized by a modified co-precipitation method. The crystal structure of Li[Li0.24Mn0.55Co0.14Ni0.07]O2 was investigated by Rietveld analysis of structural models using X-ray and neutron powder diffraction data, indicating the presence of Li2MnO3 in the final product. Li[Li0.24Mn0.55Co0.14Ni0.07]O2 shows low initial irreversible capacity loss (47.2 mAh/g), high reversible capacity (264.6 mAh/g), good capacity retention (90.4% over 50 cycles) and satisfactory rate capability when used as the cathode material in lithium ion batteries. X-ray photoelectron spectroscopy analysis of the pristine, charged and discharged electrodes of Li[Li0.24Mn0.55Co0.14Ni0.07]O2 reveals that the Mn4 +/Mn3 + redox couple participates in the delithiation/lithiation process. Overall, the improved electrochemical performance of the Li[Li0.24Mn0.55Co0.14Ni0.07]O2 electrode can be ascribed to the controlled and specially designed morphology and the composition of the sample that is produced by the co-precipitation method.


► Li[Li0.24Mn0.55Co0.14Ni0.07]O2 was prepared by a modified co-precipitation method.
► The refined composition of final product is consistent with the nominal formula.
► This material exhibits high discharge capacity and satisfactory rate capability.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 233, 21 February 2013, Pages 12–19
نویسندگان
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