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Single-crystalline nanotubes of spinel lithium nickel manganese oxide with lithium titanate anode for high-rate lithium ion batteries
被引:33
作者:
Ding, Yuan-Li
[1
]
Goh, Bee Min
[2
]
Zhang, Han
[2
]
Loh, Kian Ping
[2
]
Lu, Li
[1
]
机构:
[1] Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore
[2] Natl Univ Singapore, Dept Chem, Graphene Res Ctr, Singapore 117543, Singapore
关键词:
Lithium nickel manganese oxide;
Single-crystalline;
Nanotubes;
Lithium ion batteries;
LI-ION;
ELECTROCHEMICAL PROPERTIES;
LINI0.5MN1.5O4;
SPINEL;
ELECTRODE MATERIAL;
CATHODE MATERIALS;
RATE CAPABILITY;
PERFORMANCE;
INSERTION;
NANOWIRES;
AL;
D O I:
10.1016/j.jpowsour.2013.02.047
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
Single-crystalline nanotubes of LiNi0.473Mn1.473Al0.054O4 (LNMAO-NT) have been synthesized and evaluated as cathode using LNMAO-NT/Li half cell and LNMAO-NT/Li4Ti5O12 (LTO) full cell, respectively. Galvanostatic charge/discharge tests show that the LNMAO-NT half cell exhibits discharge capacity of 118 mAh g(-1) and specific energy (calculated only based on the cathode material) of 508 Wh kg(-1) at 5 C. Two types of full cells (LTO-limited and LNMAO-NT-limited cell) are constructed using three-electrode configuration. Measurement results reveal that [TO-limited full cell has a lower cathode potential vs. Li metal than LNMAO-NT-limited one at the end of cutoff voltage. The LNMAO-NT/LTO full cell exhibits discharge capacity of 158 mAh g(-1) at 0.5 C and 120 mAh g(-1) at 10 C, respectively, showing superior high-rate capability of LNMAO-NT. In addition, 87% of capacity retention of the LNMAO-NT/LTO full cell can be achieved after 200 cycles at 5 C, indicating good structural stability of one dimensional LNMAO-NT. Moreover, study of in situ Raman spectra at different potentials reveals good structural reversibility during charging and discharging process, indicating that LNMAO-NT would be one of the most promising high-voltage cathodes for high power lithium ion batteries. (c) 2013 Elsevier B.V. All rights reserved.
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页码:1 / 9
页数:9
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