Preparation of LiFePO{sub 4} with inverse opal structure and its satisfactory electrochemical properties

Journal Article · Thu Dec 08 00:00:00 EST 2005 · Materials Research Bulletin

OSTI ID:20889805

Junbiao, Lu ^[1]; Zilong, Tang ^[1]; Zhongtai, Zhang ^[1]; Wanci, Shen ^[1]

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1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084 (China)

Phase pure, well-crystallized and homogeneous LiFePO{sub 4} powder with inverse opal structure was obtained by calcining the precursors of Li{sup +}, Fe{sup 2+} and PO{sub 4} {sup 3-} in the presence of organic template of poly(styrene-methyl methacrylate-acrylic acid) latex micro-spheres under nitrogen atmosphere. The resultant products were characterized by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), chemical titration, Fourier transform infrared (FTIR) and Land 2001A electrochemical measurement system. Results indicated that after the decomposition of organic template, inverse opal structure and conductive carbon were left in the resultant products. With the large specific surface area resulting from inverse opal structure and with the conductive carbon, the products delivered satisfactory capacity and superior rate capability at room temperature, i.e., over 100 mAh/g at the high current density of 5.9C.

• OSTI ID: 20889805
• Journal Information: Materials Research Bulletin, Vol. 40, Issue 12; Other Information: DOI: 10.1016/j.materresbull.2005.07.022; PII: S0025-5408(05)00271-0; Copyright (c) 2005 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
CURRENT DENSITY
DECOMPOSITION
ELECTROCHEMISTRY
ENERGY STORAGE
FOURIER TRANSFORMATION
INFRARED SPECTRA
IONIC CONDUCTIVITY
IRON IONS
LATEX
LITHIUM IONS
METHACRYLIC ACID ESTERS
OPALS
SCANNING ELECTRON MICROSCOPY
SPECIFIC SURFACE AREA
STYRENE
TEMPERATURE RANGE 0273-0400 K
TITRATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY