Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7740295 | Journal of Power Sources | 2013 | 6 Pages |
Abstract
The LiNi0.5âxCuxMn1.5âyAlyO4 (x = 0, 0.05, y = 0, 0.05) powders are synthesized by liquid co-precipitation and wet-milling. The doping effect on LiNi0.5Mn1.5O4 by Al3+, Cu2+, and Al3+/Cu2+ co-doping are investigated and compared in relation to physical and electrochemical characterization, namely, through X-ray diffraction, scanning electron microscopy, electronic conductivity, cyclic voltammetry and cycle tests. Results suggest that both Al3+ and Cu2+ doping effectively improve electrochemical performance of LiNi0.5Mn1.5O4, although the effect is different between the two cations. All doped samples exceed 95% capacity retention after 100 cycles at room temperature compared to 92% retention for the undoped sample. Moreover, co-doped LiNi0.45Cu0.05Mn1.45Al0.05O4 exhibits the best cyclic performance with slight superiority.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Jianhong Liu, Zhaoqin Sun, Jiaona Xie, Hongyu Chen, Ningning Wu, Borong Wu,