Preparation of LiFePO4 rods, LiFePO4/graphene composite and their electrochemical performances

被引：2

作者：

Zhao, N. ^{[1
]}

Gao, X. W. ^{[2
]}

Chen, F. ^{[1
]}

Liu, C. ^{[1
]}

Cao, L. ^{[1
]}

Zang, C. L. ^{[1
]}

Cheng, X. N. ^{[1
]}

Yang, J. ^{[1
]}

机构：

[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Peoples R China

[2] AIIM Facil, Inst Superconducting & Elect Mat, N Wollongong, NSW 2500, Australia

来源：

MATERIALS TECHNOLOGY | 2011年 / 26卷 / 05期

基金：

美国国家科学基金会;

关键词：

LiFePO4; Graphene; Composite; Electrochemical performance; LITHIUM-ION BATTERIES; CARBON-COATED LIFEPO4; SOL-GEL SYNTHESIS; CATHODE MATERIALS; OXIDE SHEETS; GRAPHENE; FILMS;

D O I：

10.1179/175355511X13110717549279

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Rod-like LiFePO4 particles were prepared via solvothermal method using a mixed solution of isopropanol and deionised water as solvent with sucrose and nitrilotriacetic acid as additives. The effects of solvents and additives on the microstructure, chemical composition and morphology of the obtained products were investigated by powder X-ray diffraction, scanning electron microscopy and energy dispersive spectrometer. Results indicated that nitrilotriacetic acid made an important contribution to the rod-like morphology. The obtained LiFePO4 particles were further dispersed in graphene oxide sol to prepare the LiFePO4/graphene composite, followed by heat treating in Ar/H-2 atmosphere. The electrochemical properties of LiFePO4 and LiFePO4/graphene composite as cathode in lithium ion cells were tested via galvanostatic charge/discharge cycling. Both LiFePO4 and LiFePO4/graphene composite demonstrated stable performance over 100 cycles. Compared with pure LiFePO4, the specific capacity was improved extensively in the LiFePO4/graphene composite.

引用

页码：232 / 235

页数：4

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