کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1635636 1516945 2016 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Influences of transition metal on structural and electrochemical properties of Li[NixCoyMnz]O2 (0.6≤x≤0.8) cathode materials for lithium-ion batteries
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
Influences of transition metal on structural and electrochemical properties of Li[NixCoyMnz]O2 (0.6≤x≤0.8) cathode materials for lithium-ion batteries
چکیده انگلیسی

Li[NixCoyMnz]O2 (0.6≤x≤0.8) cathode materials with a typical hexagonal α-NaFeO2 structure were prepared utilizing a co-precipitation method. It is found that the ratio of peak intensities of (003) to (104) observed from X-ray diffraction (XRD) increases with decreasing the Ni content or increasing the Co content. The scanning electron microscopy (SEM) images reveal that the small primary particles are agglomerated to form the secondary ones. As the Mn content increases, the primary and secondary particles become larger and the resulted particle size for the Li[Ni0.6Co0.2Mn0.2]O2 is uniformly distributed in the range of 100–300 nm. Although the initial discharge capacity of the Li/Li[NixCoyMnz]O2 cells reduces with decreasing the Ni content, the cyclic performance and rate capability are improved with higher Mn or Co content. The Li[Ni0.6Co0.2Mn0.2]O2 can deliver excellent cyclability with a capacity retention of 97.1% after 50 cycles.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 26, Issue 5, May 2016, Pages 1396–1402
نویسندگان
, , , , , , , ,