کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11028295 | 1662996 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
X-ray and thermal analysis of high-capacity iron- and nickel-containing lithium-rich layered-oxide cathode treated by carbothermal reduction
ترجمه فارسی عنوان
اشعه ایکس و تجزیه و تحلیل حرارتی از ظرفیت بالا لیتیم غنی از آهن و نیکل غنی از اکسید کاتد تحت درمان با کاهش کربوترمال
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
A high-capacity iron- and nickel-substituted Li2MnO3 cathode [i.e., Li1.26Fe0.11Ni0.11Mn0.52O2 (LFNM)] treated by carbothermal reduction was analyzed, and the results clarified that it has both high capacity and high safety levels. X-ray analysis of a reduced LFNM (R-LFNM) cathode clarified the following. Migration of transition metals in the lattice as a result of the carbothermal reduction stabilizes the layered lattice structure, which prevents lattice shrinkage during charging and enhances charge compensation. As a result, more lithium ions can return to the cathode during discharging; namely, the irreversible capacity of the cathode decreases. Thermal stability of the R-LFNM cathode was evaluated by differential scanning calorimetry (DSC), and the results show that the total heat evolved from the R-LFNM cathode remains at a lower level compared with that of other cobalt- and nickel-containing Li2MnO3 cathodes. An analysis of the lattice structure reveals that low exothermic heat from the charged R-LFNM cathode results from the distinctive property of its crystal lattice changing from layered to thermally stable spinel during charging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 290, 10 November 2018, Pages 577-585
Journal: Electrochimica Acta - Volume 290, 10 November 2018, Pages 577-585
نویسندگان
Kaoru Narita, Ryota Yuge, Sadanori Kuroshima, Mitsuharu Tabuchi, Kyosuke Doumae, Hideka Shibuya, Noriyuki Tamura, Masayoshi Tsuji,