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
来源：
JOURNAL OF POWER SOURCES | 2013年 / 236卷
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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