Uniform hematite nanocapsules based on an anode material for lithium ion batteries

被引：127

作者：

Kim, Hyun Sik ^{[3
,4
]}

Piao, Yuanzhe ^{[1
,2
,5
]}

Kang, Soon Hyung ^{[3
,4
]}

Hyeon, Taeghwan ^{[1
,2
]}

Sung, Yung-Eun ^{[3
,4
]}

机构：

[1] Seoul Natl Univ, Natl Creat Res Initiat Ctr Oxide Nanocrystalline, Seoul 151744, South Korea

[2] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[3] Seoul Natl Univ, Sch Chem & Biol Engn, Seoul 151744, South Korea

[4] Seoul Natl Univ, Res Ctr Energy Convers & Storage, Seoul 151744, South Korea

[5] Seoul Natl Univ, Dept Nano Sci & Technol, Grad Sch Convergence Sci & Technol, Suwon 443270, South Korea

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2010年 / 12卷 / 03期

关键词：

Lithium ion battery; Anode material; Hematite; Nanocapsules; GAS SENSORS; ALPHA-FE2O3; SIZE;

D O I：

10.1016/j.elecom.2009.12.040

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Uniform alpha-Fe2O3 nanocapsules with a high surface area were synthesized by a novel wrap-bake-peel approach consisting of silica coating, heat treatment and finally the removal of the silica coating layer. The length, diameter and shell thickness of the hematite nanocapsules were about 65, 15 and 5 nm, respectively. The electrochemical properties of the alpha-Fe2O3 nanocapsules were investigated by cyclic voltammetry and charge/discharge measurements. The alpha-Fe2O3 nanocapsules showed a high reversible capacity of 888 mAh/g in the initial cycle and 740 mAh/g after 30 cycles as well as good capacity retention. This excellent electrochemical performance was attributed to the high surface area, thin shell and volume space of the hollow structure. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：382 / 385

页数：4

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