کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8029318 | 1517643 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Cycle performance improvement of Li-rich layered cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 by ZrO2 coating
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Lithium-rich layered cathode material Li[Li0.2Mn0.54Ni0.13Co0.13]O2 with spherical morphology is prepared via co-precipitation method followed by high-temperature treatment and surface coated with a uniform nano-layer of ZrO2 by controlled-hydrolysis of Zirconium(IV) Propoxide. The results show that Li[Li0.2Mn0.54Ni0.13Co0.13]O2 with a well-ordered layered structure consists of small and homogenous primary particles ranging from 100Â nm to 200Â nm.The ZrO2 layer with nano-sized particles is coated uniformly on the matrix particle surface. A notable improvement of the cathode coated by ZrO2 is obtained in cycle performance from charge-discharge cycling tests in the range of 2.0-4.8Â V, and the optimum amount of ZrO2 coating which maximizes the capacity retention is 1Â wt.%. A high initial discharge capacity of 253.1Â mAh/g at 0.1C is obtained for the 1Â wt.% ZrO2-coated sample, and it maintains a capacity of 207.3Â mAh/g after 50Â cycles at 0.5C and a capacity of 235.3Â mAh/g after 50Â cycles at 0.2C. The improved cycling performance of ZrO2-coated Li[Li0.2Mn0.54Ni0.13Co0.13]O2 is attributed to the decrease of electrolyte decomposition reactions and the alleviation of the impedance due to the existence of ZrO2 coating layer.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Surface and Coatings Technology - Volume 235, 25 November 2013, Pages 570-576
Journal: Surface and Coatings Technology - Volume 235, 25 November 2013, Pages 570-576
نویسندگان
Zhiyuan Wang, Enzuo Liu, Lichao Guo, Chunsheng Shi, Chunnian He, Jiajun Li, Naiqin Zhao,