Studies on LiFePO4 as cathode material in Li-ion batteries

J. Illig; T. Chrobak; M. Ender; J. P. Schmidt; D. Klotz; E. Ivers-Tiffée

doi:10.1149/1.3505456

Studies on LiFePO₄ as cathode material in Li-ion batteries

J. Illig, T. Chrobak, M. Ender, J. P. Schmidt, D. Klotz, E. Ivers-Tiffée

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

24 Citations (Scopus)

Abstract

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.

Original language	English
Title of host publication	Batteries and Energy Technology (General) - 217th ECS Meeting
Pages	3-17
Number of pages	15
Edition	30
DOIs	https://doi.org/10.1149/1.3505456
Publication status	Published - 2010
Externally published	Yes
Event	Batteries and Energy Technology Joint General Session - 217th ECS Meeting - Vancouver, BC, Canada Duration: Apr 25 2010 → Apr 30 2010

Publication series

Name	ECS Transactions
Number	30
Volume	28
ISSN (Print)	1938-5862
ISSN (Electronic)	1938-6737

Conference

Conference	Batteries and Energy Technology Joint General Session - 217th ECS Meeting
Country	Canada
City	Vancouver, BC
Period	4/25/10 → 4/30/10

All Science Journal Classification (ASJC) codes

Engineering(all)

Access to Document

10.1149/1.3505456

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Illig, J, Chrobak, T, Ender, M, Schmidt, JP, Klotz, D & Ivers-Tiffée, E 2010, Studies on LiFePO₄ as cathode material in Li-ion batteries. in Batteries and Energy Technology (General) - 217th ECS Meeting. 30 edn, ECS Transactions, no. 30, vol. 28, pp. 3-17, Batteries and Energy Technology Joint General Session - 217th ECS Meeting, Vancouver, BC, Canada, 4/25/10. https://doi.org/10.1149/1.3505456

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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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