C-rate performance of silicon oxycarbide anodes for Li plus batteries enhanced by carbon nanotubes

被引：31

作者：

Shen, J. ^{[1
]}

Ahn, D. ^{[1
,2
]}

Raj, R. ^{[1
,2
]}

机构：

[1] Univ Colorado, Dept Mech Engn, Boulder, CO 80309 USA

[2] PDC Energy, Louisville, CO USA

来源：

JOURNAL OF POWER SOURCES | 2011年 / 196卷 / 05期

基金：

美国国家科学基金会;

关键词：

CNTs; Li ion battery anodes; Silicon oxycarbide; Polymer-derived ceramics; LITHIUM-ION BATTERIES; RATE CAPABILITY; INTERCALATION; CAPACITY; STORAGE; NANOCOMPOSITE; COMPOSITE; GRAPHITE;

D O I：

10.1016/j.jpowsour.2010.11.009

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：

We show that employing single wall carbon nanotubes (CNTs) as the conducting agent significantly increases the capacity of silicon oxycarbide anodes at high C-rates. In these anodes 515 mAh g(-1) can be extracted in just over 3 min. The capacity decreases to 300 mAh g(-1) at the same extraction rate when carbon black is used as the conducting agent. The CNT anodes have good cyclic stability, retaining 89.2% of initial capacity after 40 cycles. The coulombic efficiency ranges from 95% to 100%. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：2875 / 2878

页数：4

共 19 条

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