Evaluation of the rate determining processes for LiFePO 4 as cathode material in lithium-ion-batteries

J. Illig, T. Chrobak, D. Klotz, E. Ivers-Tiffée

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 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, all rate determining electrode processes have to be quantified. Electrochemical impedance spectroscopy (EIS) has proven to be a powerful tool for the characterization of electrochemical systems. In recent publications (1,2), a physical interpretation for the impedance response of LiFePO 4/Li-cells was given and an equivalent circuit model was proposed. In this contribution, the proposed equivalent circuit is used to quantify the predominant electrode processes depending on temperature (0°C...30°C), SoC (10% ... 100%) and microstructure characteristics (porosity).

Original languageEnglish
Title of host publicationRechargeable Lithium and Lithium Ion Batteries
Pages3-15
Number of pages13
Edition29
DOIs
Publication statusPublished - 2011
Externally publishedYes
EventRechargeable Lithium and Lithium Ion Batteries - 218th ECS Meeting - Las Vegas, NV, United States
Duration: Oct 10 2010Oct 15 2010

Publication series

NameECS Transactions
Number29
Volume33
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Conference

ConferenceRechargeable Lithium and Lithium Ion Batteries - 218th ECS Meeting
CountryUnited States
CityLas Vegas, NV
Period10/10/1010/15/10

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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