Evaluation of commercial lithium-ion cells based on composite positive electrode for plug-in hybrid electric vehicle applications. Part II. Degradation mechanism under 2 C cycle aging

Journal Article · Thu Dec 01 00:00:00 EST 2011 · Journal of Power Sources

DOI:https://doi.org/10.1016/j.jpowsour.2011.08.078· OSTI ID:1033265

Dubarry, Matthieu; Truchot, Cyril; Liaw, Bor Yann; Gering, Kevin; Sazhin, Sergiy; Jamison, David; Michelbacher, Christopher

Degradation phenomena and inference of their underlying mechanisms during 2 C cycle aging in a cell design comprising {l_brace}LiMn1/3Ni1/3Co1/3O2 + LiMn2O4{r_brace} composite positive electrode are studied and reported in this work. We describe how aging phenomena in the cells were studied and incremental capacity analysis applied to infer cell degradation mechanisms in the cycle aging process. Two stages of degradation were observed in the life cycle under this aging regime. In the first stage, we conclude that loss of lithium inventory was the cause of capacity fade. As a result of such parasitic loss, the cell further suffered from loss of active materials in the second stage, in which the positive electrode kinetics was hampered and the capacity loss accelerated.

• Research Organization: Idaho National Lab. (INL), Idaho Falls, ID (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: DE-AC07-05ID14517
• OSTI ID: 1033265
• Report Number(s): INL/JOU-11-24495; JPSODZ; TRN: US201202%%735
• Journal Information: Journal of Power Sources, Vol. 196, Issue 23; ISSN 0378-7753
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
AGING
CAPACITY
DESIGN
ELECTRODES
EVALUATION
KINETICS
LIFE CYCLE
LITHIUM
HYBRID ELECTRIC-POWERED VEHICLES
Composite cathode
cycle aging
Degradation mechani
Incremental capacity
Loss of lithium inventory
PHEV