Electrochemical properties of lithium-ion power sources based on iron fluoride

Authors

  • Павло Ігорович Колковський Vasyl Stefanik Precarpathian National University Street., 57, Ivano-Frankivsk, Ukraine 76025, Ukraine
  • Богдан Костянтинович Остафійчук Vasyl Stefanik Precarpathian National University Street., 57, Ivano-Frankivsk, Ukraine 76025, Ukraine
  • Володимир Володимирович Мокляк Institute of Metal Physics. GV Kurdyumova NAS of Ukraine Academician Vernadsky Boulevard, 36, Kyiv, Ukraine, Ukraine

DOI:

https://doi.org/10.15587/1729-4061.2012.5749

Keywords:

hydrated forms of iron fluoride, intercalation, lithium-ion power source

Abstract

The article presents the testing of thermally annealed iron fluoride FeF3·3H2O as a cathode material for lithiumionpower source (LIPS). The advantages of application of FeF3 in LIPS is a relatively high voltage of an opencircuit (up to 4 V) and specific capacity at 200 mA h/g. Obtaining of the studied form of iron fluoride was carriedout by phased thermal annealing at 150 °C (1 h, removal of physical water) and 250 °C (2 h, removal of crystaladsorbed water) in the flow of drained argon. The results are revealed in the research of impedance spectroscopyand discharge characteristics of formed LIPS. It was determined that, for the increase of energy characteristics ofLIPS the method of thermal annealing of FeF3·3H2O is more efficient than the addition of conductive additives tothe cathode mixture. The discharge curve of anhydrous form of FeF3 is characterized by the broad horizontal areawithin the range of values of specific capacity 200-1200 A·h / kg, after which there is a sharp decline in voltage ofthe open circuit. With deep discharge (to 0.5 V) we have reached the values of specific capacity 1300 A·h/kg, thatexceeds at 70% the specific characteristics of LIPS based on hydrated forms of FeF3

Author Biographies

Павло Ігорович Колковський, Vasyl Stefanik Precarpathian National University Street., 57, Ivano-Frankivsk, Ukraine 76025

Engineer I category

Department material and new technology

Богдан Костянтинович Остафійчук, Vasyl Stefanik Precarpathian National University Street., 57, Ivano-Frankivsk, Ukraine 76025

Corresponding Member of  Ukraine NAS, Professor, Head of the Department of Materials and emerging technologies

Department material and new technology

Володимир Володимирович Мокляк, Institute of Metal Physics. GV Kurdyumova NAS of Ukraine Academician Vernadsky Boulevard, 36, Kyiv, Ukraine

Ph.D.

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Published

2012-12-18

How to Cite

Колковський, П. І., Остафійчук, Б. К., & Мокляк, В. В. (2012). Electrochemical properties of lithium-ion power sources based on iron fluoride. Eastern-European Journal of Enterprise Technologies, 6(8(60), 4–7. https://doi.org/10.15587/1729-4061.2012.5749

Issue

Vol. 6 No. 8(60) (2012): Energy-saving technologies and equipment

Section

Energy-saving technologies and equipment

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Copyright (c) 2014 Павло Ігорович Колковський, Богдан Костянтинович Остафійчук, Володимир Володимирович Мокляк

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