Ac impedance analysis of lithium ion battery under temperature control

Toshiyuki Momma, Mariko Matsunaga, Daikichi Mukoyama, Tetsuya Osaka*

*この研究の対応する著者

研究成果: Article査読

143 被引用数 (Scopus)

抄録

Ac impedance spectra of electrochemical systems are analyzed by considering adequate equivalent circuits, while the differentiation of responses for each elemental step is sometimes difficult. In this study, enlarged impedances were measured by lowering the temperature of a lithium ion battery (LIB) to make the separation of confusing responses easier. The impedance spectra obtained at the temperatures between -20 °C and 20 °C showed drastic change in sizes with shifting of the characteristic frequency. The analysis of impedance spectra using an equivalent circuit revealed changes in resistance of each component and shifting of the time constant for each elemental step. The frequency domain of impedance response of solid electrolyte interphase (SEI) was found to overlap with that of the inductive component of the outer electric lead at 20 °C in our study. The impedance measurement at the low temperatures is considered to be useful for the detection of the SEI and the accurate evaluation of LIB.

本文言語English
ページ(範囲)304-307
ページ数4
ジャーナルJournal of Power Sources
216
DOI
出版ステータスPublished - 2012 10 15

ASJC Scopus subject areas

  • 再生可能エネルギー、持続可能性、環境
  • エネルギー工学および電力技術
  • 物理化学および理論化学
  • 電子工学および電気工学

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