کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9761779 | 1498428 | 2005 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis of LiCo1âxMnxO2 from a low-temperature route and characterization as cathode materials in Li-ion cells
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Manganese-substituted lithium-cobalt oxides, LiCo1âxMnxO2 (0â¤xâ¤0.5), have been rapidly synthesized at 350 °C by a solution combustion method using diformyl hydrazine (DFH) as a fuel. Physical properties of these compounds are discussed in the light of structural [X-ray diffraction (XRD) and scanning electron miscroscope (SEM)] and spectroscopic (FTIR and Raman) studies. The samples with x<0.3 are indexed in R3¯m space group having a layered structure and the samples with xâ¥0.3 in Fd3m space group with a modified spinel structure. Electrochemical characterization of these samples has been studied using cyclic voltammetry, galvanostatic charge-discharge cycling in the potential range 3-4.5 V and impedance spectroscopy. Specific capacity of the compound with x=0.2 has been found to be about 138 mA h gâ1. With an increase in x, the capacity decreases and reaches about 80 mA h gâ1 at x=0.5. From impedance spectroscopy, it has been found that the charge-transfer resistance is minimum for the sample with x=0.2, which supports the charge-discharge cycling data.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 176, Issues 3â4, 31 January 2005, Pages 281-290
Journal: Solid State Ionics - Volume 176, Issues 3â4, 31 January 2005, Pages 281-290
نویسندگان
P. Suresh, S. Rodrigues, A.K. Shukla, H.N. Vasan, N. Munichandraiah,