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Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

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LiFePO4 Nanostructures Fabricated from Iron(III) Phosphate (FePO4 · 2H2O) by Hydrothermal Method

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Title
LiFePO4 Nanostructures Fabricated from Iron(III) Phosphate (FePO4 · 2H2O) by Hydrothermal Method
Author
Saji, Viswanathan S.Song, Hyun-Kon
Issue Date
2015-01
Publisher
AMER SCIENTIFIC PUBLISHERS
Citation
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, v.15, no.1, pp.734 - 741
Abstract
Electrode materials having nanometer scale dimensions are expected to have property enhancements due to enhanced surface area and mass/charge transport kinetics. This is particularly relevant to intrinsically low electronically conductive materials such as lithium iron phosphate (LiFePO4), which is of recent research interest as a high performance intercalation electrode material for Liion batteries. Many of the reported works on LiFePO4, synthesis are unattractive either due to the high cost of raw materials or due to the complex synthesis technique. In this direction, synthesis of LiFePO4 directly from inexpensive FePO4, shows promise.The present study reports LiFePO4, nanostructures prepared from iron (III) phosphate (FePO4 center dot 2H(2)O) by precipitation-hydrothermal method. The sintered powder was characterized by X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), Inductive coupled plasma-optical emission spectroscopy (ICP-OES), and Electron microscopy (SEM and TEM). Two synthesis methods, viz, bulk synthesis and anodized aluminum oxide (AAO) template-assisted synthesis are reported. By bulk synthesis, micro-sized particles having peculiar surface nanostructuring were formed at precipitation pH of 6.0 to 7.5 whereas typical nanosized LiFePO4, resulted at pH >= 8.0. An in-situ precipitation strategy inside the pores of AAO utilizing the spin coating was utilized for the AAO-template-assisted synthesis. The template with pores filled with the precipitate was subsequently subjected to hydrothermal process and high temperature sintering to fabricate compact rod-like structures.
URI
https://scholarworks.unist.ac.kr/handle/201301/9539
URL
https://www.ingentaconnect.com/content/asp/jnn/2015/00000015/00000001/art00136%3bjsessionid=ama88i4cvnhg.x-ic-live-02
DOI
10.1166/jnn.2015.9173
ISSN
1533-4880
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