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

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 studie...

Full description

Saved in:
Bibliographic Details
Published in:International journal of energy and environmental engineering 2022-09, Vol.13 (3), p.943-953
Main Authors: Román-Ramírez, L. A., Apachitei, G., Faraji-Niri, M., Lain, M., Widanage, D., Marco, J.
Format: Article
Language:English
Subjects:
Anodes
Cathodes
Coating effects
Coatings
Design of experiments
Design parameters
Electrochemical analysis
Electrochemistry
Electrodes
Energy
Lithium
Lithium cells
Lithium-ion batteries
Manufacturing
Mathematical models
Original Research
Performance evaluation
Physical characteristics
Physical properties
Porosity
Properties
Rechargeable batteries
Regression analysis
Renewable and Green Energy
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary: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.
ISSN:2008-9163
2251-6832
DOI:10.1007/s40095-022-00481-w