Synthesis of LiMn sub(0.75)Fe sub(0.25)PO sub(4)/C microspheres using a microwave-assisted process with a complexing agent for high-rate lithium ion batteries

LiMn sub(0.75)Fe sub(0.25)PO sub(4)/C microspheres were synthesized using a microwave-assisted process with a complexing agent. In this process, it was found that the various states of the complexing agent for different pH values of the precursor solution have significant effects on the obtained mic...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2014-06, Vol.2 (27), p.10607-10613
Main Authors: Kim, Myeong-Seong, Jegal, Jong-Pil, Roh, Kwang Chul, Kim, Kwang-Bum
Format: Article
Language:English
Subjects:
Antisite defects
Lithium-ion batteries
Microspheres
Precursors
Sustainability
Synthesis
Tap density
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Summary:LiMn sub(0.75)Fe sub(0.25)PO sub(4)/C microspheres were synthesized using a microwave-assisted process with a complexing agent. In this process, it was found that the various states of the complexing agent for different pH values of the precursor solution have significant effects on the obtained micro-spherical morphology. Furthermore, the concentration of antisite defects in the samples was also found to be affected by the pH of the precursor. The prepared secondary spheres have a high tap density of 1.3 g cm super(-3) and deliver a reversible capacity of 163 mA h g super(-1) at a 0.05 C-rate. Furthermore, remarkable rate capability is obtained, with 57% capacity retention at a 60 C-rate, as well as excellent cyclability, with 99.3% capacity retention after 100 cycles at 1 C-rate.
ISSN:2050-7488
2050-7496
DOI:10.1039/c4ta01197j