Improvement of the high rate capability of hierarchical structured Li4Ti5O12 induced by the pseudocapacitive effect

被引：141

作者：

Lai, C. ^{[1
]}

Dou, Y. Y. ^{[1
]}

Li, X. ^{[1
]}

Gao, X. P. ^{[1
]}

机构：

[1] Nankai Univ, Inst New Energy Mat Chem, Tianjin Key Lab Met & Mol Based Mat Chem, Tianjin 300071, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2010年 / 195卷 / 11期

关键词：

Lithium-ion batteries; Li4Ti5O12; High rate capability; Pseudocapacitive; Hierarchical structure; ELECTROCHEMICAL LITHIUM STORAGE; LI-ION INTERCALATION; SPINEL LI4TI5O12; NANOSTRUCTURED MATERIALS; ENERGY-STORAGE; BATTERIES; ELECTRODE; CONVERSION; NANOTUBES; NANORODS;

D O I：

10.1016/j.jpowsour.2009.12.077

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：

Hierarchical structured Li4Ti5O12, assembling from randomly oriented nanosheets with a thickness of about 10-16 nm, is fabricated bya facile hydrothermal route and following calcination. It is demonstrated that the as-prepared sample has good cycle stability and excellent high rate performance. In particular, the discharge capacity of 128 mAhg(-1) can be obtained at the high current density of 2000 mA g(-1), which is about 87% of that at the low current density of 200 mA g(-1) upon cycling, indicating that the as-prepared sample can endure great changes of various discharge current densities to retain a good stability. In addition, the pseudocapacitive effect based on the hierarchical structure, also contributes to the high rate capability of Li4Ti5O12, which can be confirmed in cyclic voltammograms. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：3676 / 3679

页数：4

共 21 条

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