A mechano- and electrochemically controlled SnSb/C nanocomposite for rechargeable Li-ion batteries

被引：101

作者：

Park, Cheol-Min ^{[1
]}

Sohn, Hun-Joon ^{[1
]}

机构：

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

来源：

ELECTROCHIMICA ACTA | 2009年 / 54卷 / 26期

关键词：

Nanocomposite; Tin-Antimony based composite; Anode materials; Lithium secondary batteries; Electrochemistry; ANODE MATERIALS; ELECTRODE MATERIALS; LITHIUM; COMPOSITES; CARBON; SN; CAPACITY; POWDERS; SIZE;

D O I：

10.1016/j.electacta.2009.06.004

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

At present, graphite (LiC6: 372 mAh g(-1), 840 mAh cm(-3)) is used as the anode material for lithium-ion batteries. However, methods to enhance the energy density, cyclability, initial Coulombic efficiency, and rate capability of lithium-ion batteries are still actively being researched. Here, we report a simple. fast, and novel method for transforming micron-sized Sn and Sb powders into ca. 10 nm- and 2-3 nm-sized SnSb crystallites by mechanochemical synthesis and electrochemical reactions, respectively. These nanocrystallites are uniformly distributed in an amorphous carbon matrix, resulting in a SnSb/C nanocomposite structure. The fabricated SnSb/C nanocomposite showed excellent electrochemical properties, such as a high energy density (1 st charge: 706 mAh g(-1)), long cyclability (ca. 550 mAh g-1 over 300 cycles), good initial Coulombic efficiency (ca. 81%). and a fast rate capability (1C: 590 mAh g(-1), 2C: 550 mAh g(-1)). (c) 2009 Elsevier Ltd. All rights reserved.

引用

页码：6367 / 6373

页数：7

共 35 条

[1] Nanostructured materials for advanced energy conversion and storage devices [J].