Enhanced electrochemical properties of nanostructured bismuth-based composites for rechargeable lithium batteries

被引：120

作者：

Park, Cheol-Min ^{[1
]}

Yoon, Sukeun ^{[1
]}

Lee, Sung-Il ^{[2
]}

Sohn, Hun-Joon ^{[1
]}

机构：

[1] Seoul Natl Univ, Dept Mat Sci & Engn, Res Ctr Energy Convers & Storage, Seoul 151742, South Korea

[2] Samsung SDI, Dev Team, Battery Business Div, Cheonan Si 330300, Chungcheongnam, South Korea

来源：

JOURNAL OF POWER SOURCES | 2009年 / 186卷 / 01期

关键词：

Bi; Bi-C composite; Anode; Cycle performance; Lithium battery; LI-ION BATTERIES; ANODE MATERIALS; SECONDARY BATTERIES; RATE CAPABILITY; CAPACITY; CARBON; NANOCOMPOSITE; CYCLABILITY; GERMANIUM; ELECTRODE;

D O I：

10.1016/j.jpowsour.2008.09.097

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：

Nanostructured Bi/C and Bi/Al2O3/C composites, prepared by high-energy mechanical milling (HEMM), are investigated as anode materials for Li-ion rechargeable batteries. X-ray diffraction (XRD) and high-resolution transmission electron microscopy (HRTEM) reveal that the Bi/C nanocomposite is composed of nano-sized Bi and amorphous C, while the Bi/Al2O3/C nanocomposite (obtained by the mechanochemical reduction of Bi2O3 and At) is composed of nano-sized Bi, amorphous Al2O3, and amorphous C. The electrochemical reaction mechanism of the Bi/C nanocomposite electrode is identified by ex situ XRD analyses combined with a differential capacity plot. Electrochemical tests show that the Bi/C and Bi/Al2O3/C nanocomposites exhibit enhanced electrochemical performances compared with that of the pure Bi electrode. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：206 / 210

页数：5

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