Er-Doped LiNi0.5Mn1.5O4 Cathode Material with Enhanced Cycling Stability for Lithium-Ion Batteries
AbstractThe Er-doped LiNi0.5Mn1.5O4 (LiNi0.495Mn1.495Er0.01O4) sample was successfully prepared by citric acid-assisted sol-gel method with erbium oxide as an erbium source for the first time. Compared with the undoped sample, the Er-doped LiNi0.5Mn1.5O4 sample maintained the basic spinel structure, suggesting that the substitution of Er3+ ions for partial nickel and manganese ions did not change the intrinsic structure of LiNi0.5Mn1.5O4. Moreover, the Er-doped LiNi0.5Mn1.5O4 sample showed better size distribution and regular octahedral morphology. Electrochemical measurements indicated that the Er-doping could have a positive impact on the electrochemical properties. When cycled at 0.5 C, the Er-doped LiNi0.5Mn1.5O4 sample exhibited an initial discharge capacity of 120.6 mAh·g−1, and the capacity retention of this sample reached up to 92.9% after 100 cycles. As the charge/discharge rate restored from 2.0 C to 0.2 C, the discharge capacity of this sample still exhibited 123.7 mAh·g−1 with excellent recovery rate. Since the bonding energy of Er-O (615 kJ·mol−1) was higher than that of Mn-O (402 kJ·mol −1) and Ni-O (392 kJ·mol−1), these outstanding performance could be attributed to the increased structure stability as well as the reduced aggregation behavior and small charge transfer resistance of the Er-doped LiNi0.5Mn1.5O4. View Full-Text
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Liu, S.; Zhao, H.; Tan, M.; Hu, Y.; Shu, X.; Zhang, M.; Chen, B.; Liu, X. Er-Doped LiNi0.5Mn1.5O4 Cathode Material with Enhanced Cycling Stability for Lithium-Ion Batteries. Materials 2017, 10, 859.
Liu S, Zhao H, Tan M, Hu Y, Shu X, Zhang M, Chen B, Liu X. Er-Doped LiNi0.5Mn1.5O4 Cathode Material with Enhanced Cycling Stability for Lithium-Ion Batteries. Materials. 2017; 10(8):859.Chicago/Turabian Style
Liu, Shanshan; Zhao, Hongyuan; Tan, Ming; Hu, Youzuo; Shu, Xiaohui; Zhang, Meiling; Chen, Bing; Liu, Xingquan. 2017. "Er-Doped LiNi0.5Mn1.5O4 Cathode Material with Enhanced Cycling Stability for Lithium-Ion Batteries." Materials 10, no. 8: 859.
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