کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7734990 | 1497958 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Facial-shape controlled precursors for lithium cobalt oxides and the electrochemical performances in lithium ion battery
ترجمه فارسی عنوان
پیشکسیران کنترل شده در صورت برای اکسید کبالت لیتیوم و عملکرد الکتروشیمیایی در باتری یون لیتیوم
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کلمات کلیدی
باتری یون لیتیوم، اکسید کبالت لیتیم، شکل صورت، پیشرونده،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
Two types of lithium cobalt oxides (LiCoO2) as cathode materials for lithium ion batteries are synthesized from two cobalt sources of different facial-shapes (octahedral and truncated-octahedral Co3O4) and Li2CO3 using solid state synthesis. From X-ray diffraction and scanning electron microscopy measurements, the reaction mechanism of the formation of LiCoO2 is investigated. It is revealed that LiCoO2 from octahedral Co3O4 with only {111} surfaces grows in one direction whereas the crystal orientation of LiCoO2 from truncated-octahedral Co3O4 with {111} and {100} surfaces is not unique and the spinel intermediates of LixCo2O4 are formed during synthesis. They show largely unequal rate and cycling performances for lithium ion battery, even though their outer appearances are nearly identical. Almost single-crystalline LiCoO2 from octahedral precursors shows much better electrochemical performances than LiCoO2 from truncated-octahedral precursors as a lithium ion battery cathode. By studying crystal orientation, it is shown that the poor electrochemical performances of LiCoO2 from truncated-octahedral Co3O4 are originated by crystal-mismatch between crystallites.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 274, 15 January 2015, Pages 659-666
Journal: Journal of Power Sources - Volume 274, 15 January 2015, Pages 659-666
نویسندگان
Jae-Hyun Shim, Sang-Woo Cho, Aleksandr Missiul, Hyun-Ok Jung, Sanghun Lee,