کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1296396 | 1498339 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of calcination temperature on the electrochemical performance of nanocrystalline LiMn2O4 prepared by a modified resorcinol-formaldehyde route
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of calcination temperature on the electrochemical performance of nanocrystalline LiMn2O4 prepared by a modified resorcinol-formaldehyde route Effect of calcination temperature on the electrochemical performance of nanocrystalline LiMn2O4 prepared by a modified resorcinol-formaldehyde route](/preview/png/1296396.png)
چکیده انگلیسی
Nanocrystalline spinel LiMn2O4 powder (LMO) was synthesized by a modified resorcinol-formaldehyde route. The effect of the calcination temperature on the physicochemical properties of the LiMn2O4 was investigated by using XRD, FESEM, BET and electrochemical measurements. Nanocrystalline spinel LiMn2O4 cathode material was shown to enhance rate capability of the cell. For optimum synthesis, the spinel LiMn2O4 showed that the optimal heat treatment protocol was 10 h calcination at 650 °C, which had 50-120 nm nano-sized particles with an average crystallite size of 47 nm and exhibited the best electrochemical performance (136.9 mAh gâ 1 at 0.2 C and 100.9 mAh gâ 1 at 60 C). Compared with the samples calcined at lower temperature (550 and 650 °C), the samples calcined at higher temperature (750 and 850 °C) had submicron-sized particles and poorer electrochemical performance. The investigations concluded that the LiMn2O4 with nano-sized particles were good for better electrochemical performance, especially for high rate capacity. Thus, it was very effective to synthesize the nanocrystalline LiMn2O4 with high rate capacity using a modified resorcinol-formaldehyde route by choosing the proper calcination temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Ionics - Volume 181, Issues 31â32, 7 October 2010, Pages 1445-1450
Journal: Solid State Ionics - Volume 181, Issues 31â32, 7 October 2010, Pages 1445-1450
نویسندگان
Yingchao Chen, Kai Xie, Yi Pan, Chunman Zheng,