کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6613267 | 459595 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of cationic and anionic substitutions on the electrochemical properties of LiNi0.5Mn1.5O4 spinel cathode materials
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Cationic and anionic doping in LiNi0.5Mn1.5O4 has been prepared via a solid state method. The effect of substitution on the structure, morphology, and electrochemical properties were investigated. The XRD and Raman results indicate that all synthesized materials have a phase-pure spinel structure with a space group of Fd3Â m and no obvious impurity phase peaks. Excellent cycle life is measured for these 5Â V Cr and (or) F-doped electrodes. When the charge/discharge rate returns to 1Â C after the test of rate capability (0.1-5Â C), the capacity can be completely recovered and the capacity retention is about 98.6%, 98.8% and 96.2% after 100 cycles for LiNi0.45Cr0.05Mn1.5O4, LiNi0.45Cr0.05Mn1.5O3.9F0.1 and LiNi0.5Mn1.5O3.9F0.1, respectively. Furthermore, rate capability is greatly influenced by the relative content of Mn3+. Cr and (or) F substitutions supply an efficient process to tune the Mn3+ concentration in the lattice.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 138, 20 August 2014, Pages 493-500
Journal: Electrochimica Acta - Volume 138, 20 August 2014, Pages 493-500
نویسندگان
Yan-Ping Zeng, Xing-long Wu, Peng Mei, Li-Na Cong, Cen Yao, Rong-Shun Wang, Hai-Ming Xie, Li-Qun Sun,