Enhanced Electrochemical Performance of Sn-Co Nanoarchitectured Electrode for Lithium Ion Batteries

被引：48

作者：

Du, Zhijia ^{[1
]}

Zhang, Shichao ^{[1
]}

机构：

[1] Beihang Univ, Sch Mat Sci & Engn, Beijing, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2011年 / 115卷 / 47期

基金：

中国国家自然科学基金;

关键词：

COATED SILICON NANOCOMPOSITES; NEGATIVE ELECTRODE; ANODE MATERIAL; TIN; COMBINATORIAL; CAPACITY; ALLOYS; ARRAY;

D O I：

10.1021/jp205979m

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：

Nanoarchitectured Sn-Co alloy electrode was prepared via a facile two-step electrodeposition. With uniform Ni nanocone-array as the substrate, Sn-Co alloy was deposited for 5 min, and densely packed cylinders were formed with semiglobular top. In this configuration, these Ni cones functioned as structure support, electron transport paths, and the inactive confining buffer. Meanwhile, the space between adjacent Sn-Co cylinders as well as the inactive Co matrix accommodated the volume change and cushioned the concomitant internal stress. The nanoarchitectured Sn-Co electrode showed a high discharge capacity of similar to 650 mAh g(-1), which maintained well with capacity retention of 97.3% after 70 cycles and 83.4% after 90 cycles. It also exhibited attractively high rate capability, delivering high-level capacities at various rates with little capacity decay. These remarkable performances of nanoarchitectured Sn-Co electrode indicated the potential application as anode materials for high-performance lithium ion battery.

引用

页码：23603 / 23609

页数：7

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