کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1491939 | 992363 | 2008 | 7 صفحه PDF | دانلود رایگان |

Fluorine-doped 5 V cathode materials LiNi0.5Mn1.5O4−xFx (0.05 ≤ x ≤ 0.2) have been prepared by sol–gel and post-annealing treatment method. The results from X-ray diffraction and scanning electron microscopy (SEM) indicate that the spinel structure changes little after fluorine doping, but the particle size varies with fluorine doping and the preparation conditions. The electrochemical measurements show that stable cycling performance can be obtained when the fluorine amount x is higher than 0.1, but the specific capacity is decreased and 4 V plateau capacity resulting from a conversion of Mn4+/Mn3+ remains. Moreover, influence of the particle size on the reversible capacity of the electrode, especially on the kinetic property, has been examined.
Journal: Materials Research Bulletin - Volume 43, Issue 12, 1 December 2008, Pages 3607–3613