کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6601201 | 459317 | 2015 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
A disordered rock-salt Li-excess cathode material with high capacity and substantial oxygen redox activity: Li1.25Nb0.25Mn0.5O2
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A disordered rocksalt Li-excess cathode material, Li1.25Nb0.25Mn0.5O2, was synthesized and investigated. It shows a large initial discharge capacity of 287 mAh gâ 1 in the first cycle, which is much higher than the theoretical capacity of 146 mAh gâ 1 based on the Mn3+/Mn4+ redox reaction. In situ X-ray diffraction (XRD) demonstrates that the compound remains cation-disordered during the first cycle. Electron energy loss spectroscopy (EELS) suggests that Mn and O are likely to both be redox active, resulting in the large reversible capacity. Our results show that Li1.25Nb0.25Mn0.5O2 is a promising cathode material for high capacity Li-ion batteries and that reversible oxygen redox in the bulk may be a viable way forward to increase the energy density of lithium-ion batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochemistry Communications - Volume 60, November 2015, Pages 70-73
Journal: Electrochemistry Communications - Volume 60, November 2015, Pages 70-73
نویسندگان
Rui Wang, Xin Li, Lei Liu, Jinhyuk Lee, Dong-Hwa Seo, Shou-Hang Bo, Alexander Urban, Gerbrand Ceder,