Evaluation of the rate determining processes for LiFePO4 as cathode material in lithium-ion-batteries

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

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

17 被引用数 (Scopus)

抄録

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).

本文言語英語
ホスト出版物のタイトルRechargeable Lithium and Lithium Ion Batteries
出版社Electrochemical Society Inc.
ページ3-15
ページ数13
29
ISBN(印刷版)9781607682394
DOI
出版ステータス出版済み - 2010
外部発表はい
イベントRechargeable Lithium and Lithium Ion Batteries - 218th ECS Meeting - Las Vegas, NV, 米国
継続期間: 10 10 201010 15 2010

出版物シリーズ

名前ECS Transactions
番号29
33
ISSN(印刷版)1938-5862
ISSN(電子版)1938-6737

会議

会議Rechargeable Lithium and Lithium Ion Batteries - 218th ECS Meeting
国/地域米国
CityLas Vegas, NV
Period10/10/1010/15/10

All Science Journal Classification (ASJC) codes

  • 工学(全般)

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