کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9760331 | 1498046 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of metal-doped todorokite-type MnO2 and its cathode characteristics for rechargeable lithium batteries
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
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چکیده انگلیسی
Todorokite-type MnO2-doped with Co and Fe has been synthesized by hydrothermal treatment of layered metal-doped manganese oxide, buserite, in water at 120-200 °C. The prepared todorokite products have been characterized by XRD and energy dispersive X-ray spectroscopic (EDX) measurements, TEM observation and thermogravimetric analysis. These measurements showed that the hydrothermal products are the metal-doped todorokite phase having large (3 Ã 3) tunnel structure, and the chemical compositions are shown to be MgxMyMn1âyO2·zH2O, where x = 0.08-0.10, y = 0.23-0.29, z = 0.35-0.54 in M = Co and x = 0.13-0.14, y = 0.03-0.16, z = 0.19-0.28 in M = Fe. The preliminary electrochemical characteristics including charge-discharge cyclings of the metal-doped-todorokite electrodes were examined as lithium insertion hosts for cathodes in rechargeable lithium batteries. The metal-doped todorokite exhibited S-shaped discharge behavior and the Co-doped one with x = 0.10, y = 0.29 showed a high discharge capacity of ca. 132 mAh gâ1-oxide and cycling capacity of 90-100 mAh gâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 146, Issues 1â2, 26 August 2005, Pages 310-314
Journal: Journal of Power Sources - Volume 146, Issues 1â2, 26 August 2005, Pages 310-314
نویسندگان
Naoaki Kumagai, Shinichi Komaba, Kiyoko Abe, Hitoshi Yashiro,