Synthesis of FePO4 cathode material for lithium ion batteries by a sonochemical method

被引：29

作者：

Okawa, Hirokazu ^{[1
]}

Yabuki, Junpei ^{[1
]}

Kawamura, Youhei ^{[2
]}

Arise, Ichiro ^{[3
]}

Sato, Mineo ^{[4
]}

机构：

[1] Akita Univ, Fac Engn & Resource Sci, Akita 0108502, Japan

[2] Univ Tsukuba, Grad Sch Syst & Informat Engn, Tsukuba, Ibaraki 3058573, Japan

[3] Kyoto Univ, Grad Sch Energy Sci, Kyoto 6068501, Japan

[4] Niigata Univ, Dept Chem & Chem Engn, Niigata 9502181, Japan

来源：

MATERIALS RESEARCH BULLETIN | 2008年 / 43卷 / 05期

关键词：

amorphous material; chemical synthesis; electron microscopy; X-ray diffraction; microstructure;

D O I：

10.1016/j.materresbull.2007.05.024

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Hydrated amorphous FePO4 was synthesized by a sonochemical reaction method, in which a solution of (NH4)(2)HPO4 and FeSO4.7H(2)O was irradiated by an ultrasonic wave. From this material, two kinds of cathode materials were easily prepared: (1) an amorphous sample prepared by heating at 350 degrees C and (2) a crystalline sample prepared by heating at 700 degrees C. Both samples consisted of homogeneous sub-micron particles. The amorphous sample of FePO4 exhibited high discharge capacities with more than 100 mAh g(-1) in the range of 3.9-2.0 V versus Li/Li+ at a current rate of 0.2 C. The sonochemical synthesis proposed herein has the following advantages: no use of oxidation agents for production of trivalent iron ions, reduction in reaction time, control of particle size, and enlargement in surface area for the preparation of the cathode material. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1203 / 1208

页数：6

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