Proposal of novel equivalent circuit for electrochemical impedance analysis of commercially available lithium ion battery

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To analyze impedance response of an electrochemical system, it is important to model the system with an adequate equivalent circuit. In the present work, an equivalent circuit was designed for the analysis of lithium ion batteries with the contributions of a variety of diffusion parameters resulting from the various particle sizes for the cathode and the solid-electrolyte interphase formed on the anode particles, as well as electrochemical reactions and inductive components. Residual errors resulting from the data fitting was investigated for a variety of equivalent circuits used. The electrochemical impedance of the electrodes in commercial lithium ion batteries at various states of charge was analyzed to evaluate the proposed circuit.

Original languageEnglish
Pages (from-to)483-486
Number of pages4
JournalJournal of Power Sources
Publication statusPublished - 2012 May 1



  • Diffusion impedance
  • Electrochemical impedance spectroscopy
  • Equivalent circuit
  • Lithium ion battery
  • SEI

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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