TY - JOUR
T1 - Investigation of the reasons for capacity fading in Li-Ion battery cells
AU - Ziv, Baruch
AU - Borgel, Valentina
AU - Aurbach, Doron
AU - Kim, Jung Hyun
AU - Xiao, Xingcheng
AU - Powell, Bob R.
PY - 2014
Y1 - 2014
N2 - Investigation of the failure mechanisms of Li-ion batteries and the consequences of their failure is of vital importance to the design of durable batteries. In this work, we examined the electrochemical performance of half and full Li-ion battery cells with several cathode materials including LiMn0.8Fe0.2PO4 (LMFP), LiMi0.5Mn1.5O 4 (LMNO), and Li[LixNiyCozMn1?x?y?z]O2 Li-rich layered oxides (HC-MNC). In contrast to half cells which demonstrated good cycling performance with more than 90% of their initial capacities retained after 100 cycles, the full cells exhibited severe capacity loss. Based on postmortem analyzes of electrodes from cells cycled at 30 and 60°C, using electrochemical, spectroscopic, and microscopic techniques, we conclude that the loss of active lithium ions due to parasitic side reactions is a main reason for capacity fading of Li-ion battery full cells. Structural degradation of the electrodes during cycling is at best a second order effect.
AB - Investigation of the failure mechanisms of Li-ion batteries and the consequences of their failure is of vital importance to the design of durable batteries. In this work, we examined the electrochemical performance of half and full Li-ion battery cells with several cathode materials including LiMn0.8Fe0.2PO4 (LMFP), LiMi0.5Mn1.5O 4 (LMNO), and Li[LixNiyCozMn1?x?y?z]O2 Li-rich layered oxides (HC-MNC). In contrast to half cells which demonstrated good cycling performance with more than 90% of their initial capacities retained after 100 cycles, the full cells exhibited severe capacity loss. Based on postmortem analyzes of electrodes from cells cycled at 30 and 60°C, using electrochemical, spectroscopic, and microscopic techniques, we conclude that the loss of active lithium ions due to parasitic side reactions is a main reason for capacity fading of Li-ion battery full cells. Structural degradation of the electrodes during cycling is at best a second order effect.
UR - http://www.scopus.com/inward/record.url?scp=84919758714&partnerID=8YFLogxK
U2 - 10.1149/2.0731410jes
DO - 10.1149/2.0731410jes
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AN - SCOPUS:84919758714
SN - 0013-4651
VL - 161
SP - A1672-A1680
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 10
ER -