期刊
JOURNAL OF POWER SOURCES
卷 268, 期 -, 页码 315-325出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2014.06.040
关键词
Aging; LiMn2O4; NMC; Safety; ARC; DSC
资金
- Linacore and alpha-Laion Project by the Federal Ministry of Economy and Technology of Germany
Aging of lithium-ion cells is an inevitable phenomenon limiting the lifetime. Undesirable side reactions during cycle or calendar aging may affect the performance of all components of the lithium-ion cell. This results in a decreased capacity and an increase in the overall cell impedance. Based on electrochemical and physical characterization methods, the aging behavior during calendar aging of a 18650-cell, containing a blend of LiMn2O4 and Li(Ni1/3Mn1/3Co1/3)O-2 (NMC) as cathode material and graphite as anode material was systematically investigated. To understand how the safety behavior of a lithium-ion cell changes with aging, accelerating rate calorimetry (ARC) and differential scanning calorimetry (DSC) were applied. With these methods the thermal stability behavior of the complete lithium-ion cell and its respective cathode and anode material were investigated. The focus of this work was it to generate first cause-effect relations between the aging under one exemplary aging condition and the thermal stability of a lithium-ion battery both on cell and material level. (C) 2014 Elsevier B.V. All rights reserved.
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