Issue 84, 2015

Large-scale preparation of Mg doped LiFePO4@C for lithium ion batteries via carbon thermal reduction combined with aqueous rheological phase technology

Abstract

A LiFePO4 precursor was prepared using an aqueous mixing process combined with rheological phase technology. Due to homogeneous mixing of the starting materials, a uniform distribution of doped atoms and coated carbon in the as-prepared LiFePO4 material was obtained. There existed a Fe3+ valence state of iron in the as-prepared sample. The uniform distribution of elements and small particles, and the surface phase of Fe3+ generated through controlled off-stoichiometry, improved the electronic conductivity. The as-prepared LiFePO4 sample delivered a discharge capacity of 166 mA h gāˆ’1 at 0.1C and presented an excellent rate capacity of 148 mA h gāˆ’1 and a high potential plateau of 3.32 V at 1C. Approximately 100% capacity retention was maintained after 150 cycles at 1C or 200 cycles at 10C. This aqueous ball-milling process is a promising route for scaled-up production of LiFePO4 materials with high quality at a reasonable cost.

Graphical abstract: Large-scale preparation of Mg doped LiFePO4@C for lithium ion batteries via carbon thermal reduction combined with aqueous rheological phase technology

Supplementary files

Article information

Article type
Paper
Submitted
18 Jun 2015
Accepted
03 Aug 2015
First published
03 Aug 2015

RSC Adv., 2015,5, 68681-68687

Large-scale preparation of Mg doped LiFePO4@C for lithium ion batteries via carbon thermal reduction combined with aqueous rheological phase technology

Y. Li, J. Hao, G. Geng, Y. Wang, X. Shang, C. Yang and B. Li, RSC Adv., 2015, 5, 68681 DOI: 10.1039/C5RA11680E

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