Investigation of the Impedance Rise and Power Fade in High-Power Li-Ion Cells.

Bloom, I. ; Jones, S. ; Battaglia, V. ; Henriksen, G. ; Motloch, C. ; Christophersen, J. ; Belt, J. ; Jungst, R. ; Case, H. ; Doughty, D.

Technical Information Center Oak Ridge Tennessee

关键词: Metal-nonmetal batteries;    Electrochemistry;    Aging tests(Materials);    Lithium;    Temperature dependence;   

RP-ID  :  DE200343816

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

Two different cell chemistries, Gen 1 and Gen 2, were subjected to accelerated aging experiments. In Gen 1 calendar life experiments, useful cell life was strongly affected by temperature and time. Higher temperature accelerated cell performance degradation. The rates of impedance increase and power fade followed simple laws based on a power of time and Arrhenius kinetics. The data have been modeled using these two concepts, and the calculated data agree well with the experimental values.