کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1287045 973209 2006 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Diagnostic examination of thermally abused high-power lithium-ion cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
Diagnostic examination of thermally abused high-power lithium-ion cells
چکیده انگلیسی

The inherent thermal instability of lithium-ion cells is a significant impediment to their widespread commercialization for hybrid-electric vehicle applications. Cells containing conventional organic electrolyte-based chemistries are prone to thermal runaway at temperatures around 180 °C. We conducted accelerating rate calorimetry measurements on high-power 18650-type lithium-ion cells in an effort to decipher the sequence of events leading to thermal runaway. In addition, electrode and separator samples harvested from a cell that was heated to 150 °C then air-quenched to room temperature were examined by microscopy, spectroscopy, and diffraction techniques. Self-heating of the cell began at 84 °C. The gases generated in the cell included CO2 and CO, and smaller quantities of H2, C2H4, CH4, and C2H6. The main changes on cell heating to 150 °C were observed on the anode surface, which was covered by a thick layer of surface deposits that included LiF and inorganic and organo-phosphate compounds. The sources of gas generation and the mechanisms leading to the formation of compounds observed on the electrode surfaces are discussed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 161, Issue 1, 20 October 2006, Pages 648–657
نویسندگان
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