Three-dimensional porous nano-Ni/Fe3O4 composite film: enhanced electrochemical performance for lithium-ion batteries

被引：57

作者：

Xiong, Qin-qin ^{[1
]}

Tu, Jiang-ping ^{[1
]}

Lu, Yi ^{[1
]}

Chen, Jiao ^{[1
]}

Yu, Ying-xia ^{[1
]}

Wang, Xiu-li ^{[1
]}

Gu, Chang-dong ^{[1
]}

机构：

[1] Zhejiang Univ, Dept Mat Sci & Engn, State Key Lab Silicon Mat, Key Lab Adv Mat & Applicat Batteries Zhejiang Pro, Hangzhou 310027, Zhejiang, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2012年 / 22卷 / 35期

关键词：

SUPERIOR ANODE MATERIAL; STORAGE; ELECTRODES; MAGNETITE; CAPACITY; GROWTH; ARRAYS;

D O I：

10.1039/c2jm33770c

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：

A novel 3D porous nano-Ni/Fe3O4 composite film is prepared by electrodepositing 3D porous nano-Ni onto a Cu current collector followed by electrochemical plating of Fe3O4 nanoflakes. As an anode material for lithium-ion batteries, the resultant 3D porous nano-Ni/Fe3O4 composite film shows an improved initial columbic efficiency of 86.0%, high capacity and good cycle stability (951.9 mA h g(-1) at 1 C up to 50 cycles), as well as enhanced rate capability. This unique electrode configuration possesses the following features: high Fe3O4- electrolyte contact area, direct contact between each naonflake and its 'own' current collector of nano-Ni, fast Li+ diffusion and better accommodation of volume change. It suggests that the 3D porous nano-Ni/Fe3O4 composite film, synthesized by the two-step electrodeposition strategy, is a promising anode material for high energy-density lithium-ion batteries.

引用

页码：18639 / 18645

页数：7

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