Abstract

In this study the effect of fuel rate and annealing on particle formation of LiFePO4 as battery cathode using flame spray pyrolysis method was investigated numerically and experimentally. Numerical study was done using ANSYS FLUENT program. In experimentally, LiFePO4 was synthesized from inorganic aqueous solution followed by annealing. LPG was used as fuel and air was used as oxidizer and carrier gas. Annealing process attempted in inert atmosphere at 700°C for 240 min. Numerical result showed that the increase of fuel rate caused the increase of flame temperature. Microscopic observation using Scanning Electron Microscopy (SEM) revealed that all particles have sphere and polydisperse. Increasing fuel rate caused decreasing particle size and increasing particles crystallinity. This phenomenon attributed to the flame temperature. However, all produced particles still have more amorphous phase. Therefore, annealing needed to increase particles crystallinity. Fourier Transform Infrared (FTIR) analysis showed that all particles have PO4 function group. Increasing fuel rate led to the increase of infrared spectrum absorption corresponding to the increase of particles crystallinity. This result indicated that phosphate group vibrated easily in crystalline phase. From Electrochemical Impedance Spectroscopy (EIS) analysis, annealing can cause the increase of Li+ diffusivity. The diffusivity coefficient of without and with annealing particles were 6.84399×10-10 and 8.59888×10-10 cm2 s-1, respectively.

Original languageEnglish
Title of host publication5th Nanoscience and Nanotechnology Symposium, NNS 2013
PublisherAmerican Institute of Physics Inc.
Pages173-178
Number of pages6
ISBN (Print)9780735412187
DOIs
Publication statusPublished - 2014
Event5th Nanoscience and Nanotechnology Symposium, NNS 2013 - Surabaya, Indonesia
Duration: 23 Oct 201325 Oct 2013

Publication series

NameAIP Conference Proceedings
Volume1586
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference5th Nanoscience and Nanotechnology Symposium, NNS 2013
Country/TerritoryIndonesia
CitySurabaya
Period23/10/1325/10/13

Keywords

  • Flame spray pyrolysis

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