Enhanced Elevated-Temperature Performance of AI-Doped Single-Crystalline LiMn2O4 Nanotubes as Cathodes for Lithium Ion Batteries

被引：108

作者：

Ding, Y. L. ^{[1
]}

Xie, J. ^{[1
]}

Cao, G. S. ^{[1
]}

Zhu, T. J. ^{[1
]}

Yu, H. M. ^{[1
]}

Zhao, X. B. ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, Hangzhou 310027, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 19期

关键词：

NANOSTRUCTURED MATERIALS; ENERGY-CONVERSION; SECONDARY BATTERY; STORAGE DEVICES; HIGH-POWER; SPINEL; NANORODS; AL; MICROSPHERES; SUBSTITUTION;

D O I：

10.1021/jp201669x

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：

Al-doped LiMn2O4 nanotubes have been synthesized using beta-MnO2 nanotubes as self-templates. Singe-crystalline structure of the Al-doped spinel was verified by high resolution transmission electron microscopy and selected area electron diffraction techniques. Galvanostatic charge/discharge tests indicate that the Al-doped single-crystalline spinel nanotube delivers a discharge capacity of 110 mAh g(-1) at 0.1C rate and retains about 80% of its initial capacity after 200 cycles at 5C rate at 55 degrees C, indicating superior elevated-temperature cycling performance at a high current rate. Furthermore, high crystallinity, single-crystalline nature, and tubular morphology can be well preserved after aging tests for 30 days at 55 degrees C, revealing their good structural stability.

引用

页码：9821 / 9825

页数：5

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