Facile preparation of nanoporous and nanocrystalline LiFePO4 with excellent electrochemical properties
Journal article, 2013

A modified sol-gel process for the preparation of a nanoporous LiFePO4 (LFP) cathode with a well-ordered carbon coating has been developed. The interconnected nanocrystalline LFP was fabricated by addition of sucrose at certain time intervals, which wraps the pore wall. The atomic structure of the LFP was investigated by Rietveld refinement. The surface structure and pore properties have been investigated by SEM, TEM and BET. The structure of the coated residual carbon on the LFP was analyzed by Raman spectroscopy. Lithium ion diffusion and interface properties of the LFP electrodes were investigated by CV and impedance measurements. The LFP displays a good crystal structure, high reversible capacity, good cycle stability, and high energy efficiency. It also shows excellent high rate capability with a 10 C rate capacity of up to 118.5 mA h g(-1) at the 100th cycle and a high tap density of 1.8 g cm(-3) as a cathode material.

MATERIAL

SOL-GEL SYNTHESIS

CATHODE

COMPOSITES

RAMAN

IRON PHOSPHATE

POWDERS

PRECURSOR

CARBON-COATED LIFEPO4

PERFORMANCE

LITHIUM-ION BATTERIES

Author

Jae-Kwang Kim

Chalmers, Applied Physics, Condensed Matter Physics

Johan Scheers

Chalmers, Applied Physics, Condensed Matter Physics

Young Jin Choi

Chalmers, Applied Physics, Condensed Matter Physics

J. H. Ahn

Gyeongsang National University

G. C. Hwang

Gyeongsang National University

RSC Advances

2046-2069 (ISSN)

Vol. 3 43 20836-20842

Areas of Advance

Energy

Subject Categories

Chemical Sciences

DOI

10.1039/c3ra42516a

More information

Latest update

12/11/2018