کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11001513 | 460076 | 2018 | 27 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Dynamic impact of LiCoO2 electrodes for Li-ion battery aging evaluation
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
As Li-ion batteries (LIBs) see increasing usage for electric vehicles, the effect of transportation history on battery state-of-health remains unclear. In particular, the influence of dynamic impact on battery behavior is investigated in terms of its effect on battery aging. Standard LiCoO2 electrodes were dynamically impacted using a nano-impactor setup, and the relationship between impact cycle number (Nâ¯=â¯0, 3, 12, and 1000) and electrochemical performance is studied. Li-ion half cells constructed from impacted electrodes display decreasing first cycle Coulombic and energy efficiency with number of impacts, with electrochemical impedance spectroscopy analysis revealing an increase in the charge-transfer resistance. Accelerated capacity fading through long-term cycling is observed for Nâ¯=â¯1000 impacts, with significant voltage hysteresis and decay occurring by cycle 50. Additional ex-situ material characterization of cycled electrodes reveals a negative Raman shift by â¼2-3â¯cmâ1 for the A1g and Eg bands for the Nâ¯=â¯1000 case as compared to pristine LiCoO2, correlating to retention of material stress and electrochemical degradation via capacity fading. These results connect mechanical and electrochemical analysis of LIB electrodes, elucidating the relationship between dynamic impact and cell aging.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 586-593
Journal: Electrochimica Acta - Volume 292, 1 December 2018, Pages 586-593
نویسندگان
Ryan A. Adams, Bing Li, Jafr Kazmi, Thomas E. Adams, Vikas Tomar, Vilas G. Pol,