TY - GEN
T1 - Studies on LiFePO4 as cathode material in Li-ion batteries
AU - Illig, J.
AU - Chrobak, T.
AU - Ender, M.
AU - Schmidt, J. P.
AU - Klotz, D.
AU - Ivers-Tiffée, E.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Lithium iron phosphate is a promising cathode material for the use in lithium-ion batteries meeting the demands of good stability during cycling and safe operation due to reduced risk of thermal runaway. However, slow solid state diffusion and poor electrical conductivity reduce power capability. For further improvement, the identification of the rate determining processes is necessary. Electrochemical impedance spectroscopy (EIS) has proven to be a powerful tool for the characterization of electrochemical systems. In this contribution a deconvolution of the impedance with the distribution of relaxation times (DRT) is used to obtain a better resolution in frequency domain. Therewith, the cathodic and anodic polarization processes are identified and an impedance model for the cell is proposed.
AB - Lithium iron phosphate is a promising cathode material for the use in lithium-ion batteries meeting the demands of good stability during cycling and safe operation due to reduced risk of thermal runaway. However, slow solid state diffusion and poor electrical conductivity reduce power capability. For further improvement, the identification of the rate determining processes is necessary. Electrochemical impedance spectroscopy (EIS) has proven to be a powerful tool for the characterization of electrochemical systems. In this contribution a deconvolution of the impedance with the distribution of relaxation times (DRT) is used to obtain a better resolution in frequency domain. Therewith, the cathodic and anodic polarization processes are identified and an impedance model for the cell is proposed.
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U2 - 10.1149/1.3505456
DO - 10.1149/1.3505456
M3 - Conference contribution
AN - SCOPUS:79551517697
SN - 9781607682066
T3 - ECS Transactions
SP - 3
EP - 17
BT - Batteries and Energy Technology (General) - 217th ECS Meeting
T2 - Batteries and Energy Technology Joint General Session - 217th ECS Meeting
Y2 - 25 April 2010 through 30 April 2010
ER -