Effect of coating operating parameters on electrode physical characteristics and final electrochemical performance of lithium-ion batteries

Journal article


Roman Ramirez, L., Apachitei G., Faraji-Niri M., Lain M., Widanage D. and Marco J. (2022). Effect of coating operating parameters on electrode physical characteristics and final electrochemical performance of lithium-ion batteries. International Journal of Energy and Environmental Engineering. https://doi.org/10.1007/s40095-022-00481-w
AuthorsRoman Ramirez, L., Apachitei G., Faraji-Niri M., Lain M., Widanage D. and Marco J.
Abstract

The effect of coating parameters of NMC622 cathodes and graphite anodes on their physical structure and half-cell electrochemical performance is evaluated by design of experiments. Coating parameters include the coater comma bar gap, coating ratio and web speed. The electrochemical properties studied are gravimetric and volumetric capacity, rate performance, areal specific impedance (ASI) and C-rate. Differences in the manufacturing effects on the electrode physical structure and electrochemical performance are observed between the electrodes and are modelled by linear regression. The effect of cell coating weight and porosity on half-coin cell electrochemical performance is also evaluated by linear regression. The cathode performance at high gravimetric and volumetric C-rates is mainly influenced by coating weight, whereas porosity is the only explanatory variable for volumetric C-rates of 1C and below. For anode, correlations are only found for the C/20 and 5C gravimetric and volumetric capacities and are related to coating weight. An inverse relationship between ASI and coating weight is observed for cathode, but in general the cell physical characteristics cannot completely explain the observed ASI for both electrodes. The obtained models are useful for the design and robust manufacturing of electrodes since present a quantitative relationship between the coating parameters, cell characteristics and final cell electrochemical performance.

Year2022
JournalInternational Journal of Energy and Environmental Engineering
PublisherSpringer
ISSN2251-6832
Digital Object Identifier (DOI)https://doi.org/10.1007/s40095-022-00481-w
Publication dates
Print04 Mar 2022
Publication process dates
Accepted04 Feb 2022
Deposited07 Mar 2022
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File Access Level
Open
Accepted author manuscript
License
File Access Level
Controlled
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