期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 707, 期 -, 页码 110-116出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2013.08.032
关键词
LIB; Aging; NMC; Power
资金
- Bundesministerium fuer Bildung und Forschung (BMBF)
Here we provide a detailed study of the capacity fade and the internal resistance increase for 40 mAh LiNi1/3Mn1/3Co1/3O2/graphite cells under different cycling conditions. The effects of temperature (20 degrees C, 30 degrees C, 40 degrees C, 60 degrees C), power (72 mW, 216 mW, 432 mW), average state of charge (30%, 50%, 70%) and depth of charge/discharge (used capacity: 1.6 mAh, 8 mAh, or 20 mAh) are investigated. The ageing properties are compared with reference measurements of 40 Ah commercial cells. The cycling tests were carried out for up to 9000 h or until a state of initial capacity of 70% was reached. The results identify different ageing mechanisms and reveal which one is dominant under certain cycling conditions. In addition, the results determine how strong a certain ageing mechanism is contributing to the overall ageing of the battery. Furthermore, guidelines on how to set up the cycling tests parametrisation for optimal output per experiment and per time are given. (C) 2013 Elsevier B.V. All rights reserved.
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