Influence of temperature on the aging behavior of 18650-type lithium ion cells: A comprehensive approach combining electrochemical characterization and post-mortem analysis

被引：86
作者：
Friesen, Alex [1 ,2 ]
Moennighoff, Xaver [1 ,2 ]
Boerner, Markus [1 ,2 ]
Haetge, Jan [1 ]
Schappacher, Falko M. [1 ]
Winter, Martin [1 ,2 ,3 ]
机构：
[1] Univ Munster, MEET Battery Res Ctr, Corrensstr 46, D-48149 Munster, Germany
[2] Univ Munster, Inst Phys Chem, Corrensstr 28-30, D-48149 Munster, Germany
[3] Forschungszentrum Julich, Helmholtz Inst Muenster, IEK 12, Corrensstr 46, D-48149 Munster, Germany
来源：
JOURNAL OF POWER SOURCES | 2017年 / 342卷
关键词：
18650-type; Lithium ion cells; Aging mechanisms; Electrolyte aging; Graphite exfoliation; Temperature dependency; SOLID-ELECTROLYTE INTERPHASE; SUPERCRITICAL CARBON-DIOXIDE; LI-ION; FLUOROETHYLENE CARBONATE; BATTERY ELECTROLYTES; GRAPHITE-ELECTRODES; PROPYLENE CARBONATE; VINYLENE CARBONATE; ANODE/ELECTROLYTE INTERFACE; ELEVATED-TEMPERATURE;
D O I：
10.1016/j.jpowsour.2016.12.040
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The understanding of the aging behavior of lithium ion batteries in automotive and energy storage applications is essential for the acceptance of the technology. Therefore, aging experiments were conducted on commercial 18650-type state-of-the-art cells to determine the influence of the temperature during electrochemical cycling on the aging behavior of the different cell components. The cells, based on Li(Ni0.5Co0.2Mn0.3)O-2 (NCM532)/graphite, were aged at 20 degrees C and 45 degrees C to different states of health. The electrochemical performance of the investigated cells shows remarkable differences depending on the cycling temperature. At contrast to the expected behavior, the cells cycled at 45 degrees C show a better electrochemical performance over lifetime than the cells cycled at 20 degrees C. Comprehensive post-mortem analyses revealed the main aging mechanisms, showing a complex interaction between electrodes and electrolyte. The main aging mechanisms of the cells cycled at 45 degrees C differ strongly at contrast to cells cycled at 20 degrees C. A strong correlation between the formed SEI, the electrolyte composition and the electrochemical performance over lifetime was observed. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码：88 / 97
页数：10
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