Zr-doped Li4Ti5O12 anode materials with high specific capacity for lithium-ion batteries

被引：65

作者：

Hou, Lina ^{[1
,2
]}

Qin, Xue ^{[1
,2
,3
]}

Gao, Xuejiao ^{[1
,2
]}

Guo, Tirong ^{[1
,2
]}

Li, Xiang ^{[1
,2
]}

Li, Jia ^{[1
,2
]}

机构：

[1] Tianjin Univ, Sch Sci, Dept Chem, Tianjin 300072, Peoples R China

[2] Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China

[3] Tianjin Univ, Tianjin Key Lab Mol Optoelect Sci, Tianjin 300072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 774卷

关键词：

Lithium-ion battery; Lithium titanate; Zr-doped LTO; High specific capacity; ELECTROCHEMICAL PERFORMANCE; SPINEL LI4TI5O12; ENERGY-STORAGE; CAPABILITY; CHALLENGES; DIFFUSION; INSERTION; TITANATE; NITROGEN;

D O I：

10.1016/j.jallcom.2018.09.364

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：

Zr4+-doped Li4Ti5-xZrxO12 (x = 0, 0.05, 0.10, 0.15, 0.20) anode materials are prepared via a facile hydrothermal method. The as-obtained composites are stacked by the irregular thin nanosheets and show a pure phase structure and good crystallinity. Furthermore, doping Zr ions into Li4Ti5O12 can significantly lower the polarization, enhance the reversibility and facilitate Li+ diffusion of the electrodes. Particularly, the 0.15Zr-LTO sample delivers a fairly high initial discharge capacity of 206.4 mAh g(-1) and maintains 188.2, 170.7, 161.5, 149.1 mAh g(-1) at 1C, 2C, 5C and 10C rates (1C = 175 mAh g(-1)), respectively. Even at 20C, it exhibits the initial discharge capacities of 163.7 mAh g(-1) and the capacity retention still retains 83% (136.7 mAh g(-1)) after 500 cycles. (C) 2018 Elsevier B.V. All rights reserved.

引用

页码：38 / 45

页数：8

共 57 条

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