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February 3, 2026Journal of Applied Electrochemistry

Thermal stability and performance of Li-ion batteries at elevated temperatures: separator effects

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Authors

CRCameron Taj RomeroDSD. J. StricklandASAlejandro Sanchez

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Overview

Electrochemical methods reveal capacity loss and structural changes in Li-ion batteries at high temperatures, indicating performance limitations due to separator types.

Key Points

  • This research investigates the thermal stability and failure mechanisms of Li-ion batteries at elevated temperatures.
  • Conducted cycling experiments and design of experiment studies to assess battery performance.
  • Analyzed cells with trilayer polypropylene/polyethylene/polypropylene separators and compared them with polyimide separators.
  • Employed electrochemical impedance spectroscopy and tensile testing to evaluate capacity loss and mechanical properties.
  • Trilayer separators exhibited significant capacity loss and decreased coulombic efficiencies at 100 °C.
  • Resistance increased markedly with temperature exposure, indicating poor performance under elevated conditions.
  • Tensile testing showed reduced tensile strength and increased variability in the presence of high temperatures.

Cite This Study

Romero et al. (2026) studied this question.

synapsesocial.com/papers/6981456cf607237d8b54d491https://doi.org/10.1007/s10800-025-02399-7
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