High capacity Si/DC/MWCNTs nanocomposite anode materials for lithium ion batteries

被引：40

作者：

Zhou, Zhibin ^{[1
]}

Xu, Yunhua ^{[1
]}

Liu, Wengang ^{[1
]}

Niu, Libin ^{[1
]}

机构：

[1] Xian Univ Architecture & Technol, Sch Mat Sci & Engn, Xian 710055, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 493卷 / 1-2期

关键词：

Silicon; Multi-walled carbon nanotubes; Disordered carbon; Anode material; SILICON/CARBON COMPOSITE ANODE; CARBON NANOTUBES; SECONDARY BATTERIES; SHELL COMPOSITE; SI; INTERCALATION; ELECTRODES; INSERTION; CORE;

D O I：

10.1016/j.jallcom.2009.12.171

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：

Nanocomposites comprising nanocrystal silicon (Si), disordered carbon (DC), and multi-walled carbon nanotubes (MWCNTs) - denoted as Si/DC/MWCNTs - have been prepared by pyrolyzing the phenolformaldehyde resin (PFR) mixed with Si and MWCNTs. This nanocomposite anode material showed a discharge capacity of 1216 mAh/g in the first cycle, and a charge capacity of 711 mAh/g after 20 charge-discharge, much higher than that of Si/DC composite. It can be observed that Si particles wrapped in MWCNTs were homogeneously embedded into the matrix of the DC. The improved electrochemical performance is hypothesized to be mainly attributed to the morphology stability of the composite due to the excellent resiliency and distinct electric conductivity of the MWCNTs. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：636 / 639

页数：4

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