کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1292287 | 973385 | 2006 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Improved electrode characteristics of olivine-LiCoPO4 processed by high energy milling
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Olivine-LiCoPO4 powders have been processed by mechanical grinding for time periods ranging from 0.5 to 10Â h with conductive carbon contents of 0, 8 and 20% (w/w). In all cases the grinding process produces an amorphization of the crystalline materials and decreases both the crystallite and particle sizes. Secondary phases are detected by scanning electron microscopy and X-ray diffraction in the materials milled for times greater than 2Â h without carbon. The addition of conductive carbon during the milling process decelerates the degradation of the material and secondary phases are not detected even after 10Â h of grinding. The electrochemical performance of olivine-LiCoPO4 is improved in all the materials milled for 0.5Â h; a lower cell polarization and a larger reversible specific capacity are observed. These characteristics are enhanced in the materials grinded with conductive carbon, which also display a capacity retention with cycling clearly superior to that of the fresh LiCoPO4. Ball milling LiCoPO4 for times greater than 1Â h is detrimental for the response of the electrode, independently on the amount of conductive carbon in the grinding media.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 160, Issue 1, 29 September 2006, Pages 523-528
Journal: Journal of Power Sources - Volume 160, Issue 1, 29 September 2006, Pages 523-528
نویسندگان
M.E. Rabanal, M.C. Gutierrez, F. Garcia-Alvarado, E.C. Gonzalo, M.E. Arroyo-de Dompablo,