Impedance Spectroscopic Characterization of Polymer Lithium-ion Battery at Elevated Temperatures in Accelerated Rate Calorimeter (ARC)

Hiroaki Ishikawa, Mohamed Mohamedi, Takashi Itoh, Isamu Uchida

研究成果: Article査読

3 被引用数 (Scopus)

抄録

In this work, we present a set of thermal characterization experiments of charged prismatic polymer lithium-ion battery (PLB). Cells at different state of charge (SOC) were tested inside an accelerated rate calorimeter (ARC) to determine the onset-of-thermal runaway (OTR) temperatures, and the thermally activated components were followed by monitoring the impedance (at 1 kHz) and the open circuit voltage (OCV) as a function of temperatures. An increase in the impedance was observed at around 133°C corresponding to the polyethylene separator shutdown. Above 140°C, the OCV dropped to zero indicating an internal short-circuit due to the separator meltdown, suggesting that the pinholes created in the separator at meltdown were large enough to create an internal short circuit. In addition, electrochemical impedance spectroscopy (EIS) at some SOCs was performed in the frequency range of 10 kHz-0.1 Hz at various temperatures (25-130°C). Results were modeled using an appropriate equivalent circuit, and parameters that affected the battery behavior at high temperatures would be identified.

本文言語English
ページ(範囲)1030-1032
ページ数3
ジャーナルElectrochemistry
71
12
DOI
出版ステータスPublished - 2003 12

ASJC Scopus subject areas

  • 電気化学

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