کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1489313 992304 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Particle size effect of Ni-rich cathode materials on lithium ion battery performance
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Particle size effect of Ni-rich cathode materials on lithium ion battery performance
چکیده انگلیسی

Herein, Ni-rich cathode materials (LiNi0.8Co0.15Al0.05O2) in lithium ion batteries are prepared by a separate addition of Ni/Co salt and Al sol solution using a continuously stirred tank reactor. Retention time and solution pH were controlled in order to obtain high performance cathode material. Particle size increase was observed with a higher retention time of the reactants. Also, primary and secondary particles became smaller according to an increase of solution pH, which was probably due to a decrease of growth rate. From the cathode application, a high discharge capacity (175 mAh g−1), a high initial efficiency (90%) and a good cycleability were observed in the cathode material prepared under pH 12 condition, which was attributed to its well-developed layered property and the optimal particle size. However, rate capability was inversely proportional to the particle size, which was clarified by a decrease of charge-transfer resistance measured in the electrochemical impedance spectroscopy.

The preparation condition of Ni-rich cathode materials was investigated. When the retention time was short, a poor cathode performance was observed. For long retention time condition, cathode performance displayed a best result at pH 12.Figure optionsDownload as PowerPoint slideHighlights
► Ni-rich cathode materials (LiNi0.8Co0.15Al0.05O2) were prepared by co-precipitation method using separate addition of Al salt.
► Particle size of Ni-rich cathode materials became larger with increase of retention time and solution pH.
► Cathode performance was poor for low retention time.
► Optimal pH for co-precipitation was 12.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Research Bulletin - Volume 47, Issue 1, January 2012, Pages 73–78
نویسندگان
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