کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7737622 | 1497980 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improvement of electrochemical performance for spherical LiFePO4 via hybrid coated with electron conductive carbon and fast Li ion conductive La0.56Li0.33TiO3
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The LiFePO4/(C + La0.56Li0.33TiO3) composites with spherical morphology are synthesized for the first time via ammonia assisted hydrothermal method. The structure and electrochemical performance of LiFePO4/(C + La0.56Li0.33TiO3) are investigated by scanning electron microscope (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), charge/discharge tests and cyclic voltammetry (CV). It has been found that the hybrid coating layer composing of electron conductive C and fast Li ion conductive La0.56Li0.33TiO3 is synchronously deposited on the surface of LiFePO4 microspheres. The hybrid coating layer can be favourable for fast electron and Li+ transport, and avoid HF eroding LiFePO4 in electrolyte, thus improve the electrochemical performance. The initial discharge capacity of LiFePO4/(C + La0.56Li0.33TiO3) is 126.3 mAh gâ1, the capacity retention is still as high as 98.3% even after 100 cycles at 5 C. Even at high rate of 30 C, it still reveals a high discharge capacity of 62.3 mAh gâ1.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 252, 15 April 2014, Pages 73-78
Journal: Journal of Power Sources - Volume 252, 15 April 2014, Pages 73-78
نویسندگان
Hongbo Shu, Manfang Chen, Yanqing Fu, Xiukang Yang, Xin Yi, Yansong Bai, Qianqian Liang, Qiliang Wei, Benan Hu, Jinli Tan, Chun Wu, Meng Zhou, Xianyou Wang,