Electrochemical impedance study of commercial LiNi0.80Co0.15Al0.05O2 electrodes as a function of state of charge and aging
- Resource Type
- Authors
- Alexandros Nikolian; Lucia Fernandez Macia; Xinhua Zhu; Joris Jaguemont; Annick Hubin; Noshin Omar; Joris De Hoog
- Source
- Electrochimica Acta. 287:10-20
- Subject
- Work (thermodynamics)
Materials science
020209 energy
General Chemical Engineering
02 engineering and technology
Electrochemistry
ORP-EIS
Reliable impedance
law.invention
law
Phase (matter)
0202 electrical engineering, electronic engineering, information engineering
State-of-health estimation
Electrical impedance
LiNiCoAlO
business.industry
Aging phenomena
Charge (physics)
021001 nanoscience & nanotechnology
Dielectric spectroscopy
Electrical network
Electrode
Chemical Engineering(all)
Optoelectronics
0210 nano-technology
business
- Language
- ISSN
- 0013-4686
A comprehensive electrochemical impedance study is conducted on LiNi0.80Co0.15Al0.05O2 electrode material as a function of state-of-charge and aging. Electrodes are harvested from four commercial batteries with different state-of-health conditions. Odd random phase electrochemical impedance spectroscopy and the symmetric cell approach are applied in this work in order to obtain reliable impedance results. An equivalent electrical circuit model is constructed. The parameters related to the generalized finite-space Warburg element, the CPE element and the charge transfer resistance are further interpreted. Valuable information is obtained and closely linked to the physical phenomena. The charge transfer resistance has been proved to be the most reliable parameter for the estimation of state-of-health.