Nanocomposite LiFePO<sub>4</sub>/C as cathode material for high-rate lithium-ion batteries

Authors

  • V. V. Kosilov Joint Department of Electrochemical Energy Systems of National Academy of Sciences of Ukraine
  • S. I. Chernukhin Joint Department of Electrochemical Energy Systems of National Academy of Sciences of Ukraine
  • I. V. Romanova Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine
  • S. А. Kirillov Institute for Sorption and Problems of Endoecology of National Academy of Sciences of Ukraine

Keywords:

lithium-iron phosphate, lithium-ion battery, high-rate discharge

Abstract

Using a citric acid route, precursors have been synthesized and nanocomposites LiFePO4/C have been obtained by means of heat treatment having the particle size ca. 20 nm, specific surface area of more than 60 m2/g and the regulated content of carbon (7.6 to 12.5 wt. %). The properties of materials have been studied by thermal analysis, thermally programmed destruction, porosimetry, electronic microscopy; electrochemical characteristics have been evaluated in potentiodynamic and galvanostatic regimes. The composites obtained have specific capacity up to 134 mAh/g and demonstrate a capability of high rate discharge. In particular, upon loading with the current of 8500 mA/g (50 С), the sample containing 12.5% of carbon completely recovers its specific capacity. This signifies good prospects for the use of this material in high-rate electrochemical devices.

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How to Cite

(1)
Kosilov, V. V.; Chernukhin, S. I.; Romanova, I. V.; Kirillov S. А. Nanocomposite LiFePO<sub>4< Sub> C As Cathode Material for High-Rate Lithium-Ion Batteries. Him. Fiz. Tehnol. Poverhni 2014, 5, 99-108.

Issue

Vol. 5 No. 1 (2014): Chemistry, Physics and Technology of Surface / Himia, Fizika ta Tehnologia Poverhni

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