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Three‐stage kinetics of laser‐induced LiFePO 4 decomposition
Author(s) -
Ryabin Alexander A.,
Slautin Boris N.,
Pelegov Dmitry V.
Publication year - 2020
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5803
Subject(s) - raman spectroscopy , characterization (materials science) , lithium iron phosphate , lithium (medication) , materials science , decomposition , laser , kinetics , battery (electricity) , phase (matter) , analytical chemistry (journal) , electrochemistry , electrode , lithium battery , chemical engineering , chemistry , nanotechnology , optics , thermodynamics , ion , physics , medicine , power (physics) , organic chemistry , quantum mechanics , chromatography , endocrinology , engineering , ionic bonding
This paper reports about new insight into a problem of a laser–matter interaction during Raman probing of lithium iron phosphate (LiFePO 4 ), discusses phase transformation kinetics in powder samples, and provides some methodological recommendations. LiFePO 4 is the second most popular positive electrode material in the global lithium battery industry, but the use of Raman spectroscopy for its structural characterization is hampered by the laser‐induced degradation. The statistical/big‐data approach to Raman spectra measurements is utilized to revise the problem and suggest a simple model of laser‐induced phase transformations in powder LiFePO 4 . The results are proposed to be used for better understanding of the physics and chemistry of other processes taking place in electrochemical cells, namely, lithiation/delithiation and thermal stability/safety studies. Simple recommendations for nondestructive LiFePO 4 characterization by Raman spectroscopy are formulated.