Abstract

Herein, an experimental setup comprised of a stationary convection dryer (Comb Nozzle Dryer) supplemented by a measurement for gravimetric drying curves is introduced. The drying process of anodes for lithium‐ion batteries is experimentally investigated and compared to modeling results, showing very good agreement for the investigated films. Heat transfer coefficients of the issued impinging nozzles are characterized and measured quantitatively and are used for the drying simulation of the gravimetric drying experiments. In situ temperature changes in the films are measured and presented using an infrared camera setup.

Highlights

  • Are very complex and based on single measurements, which is why further research is needed to establish new and easy ways to illuminate the drying process

  • Introduction further experiments and simulations investigate the drying process of lithium-ion batteries to predict its influence on cell per

  • Electrode adhesion as well as rate capability and capacity of model, concluding that half of the drying time is needed to the final cell decrease, when high instead of low drying rates are chosen for electrode drying.[1,2,3]

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Summary

Experimental Section

To record the film temperature over drying time with an infrared (IR) camera and to obtain gravimetric drying curves, electrode slurries were prepared using the same mixing procedure and paste composition for all the experiments in this work. Each measurement of a gravimetric drying curve was repeated at least three times

Slurry Preparation
Gravimetric Drying Curves
 9 Copper yes foil
Film Temperature Measurements by Means of an IR Camera
Simulation of Drying Curves
Assumptions for Balancing
72 Æ 5 63 Æ 4
Simulation Model
Evaporating Mass Flux
Heat Input from the Top
Heat and Mass Transfer by Convective Air Flows
Heat Flux by Radiation from the Top
Heat Input from the Bottom
Heat Transfer by Free Convection
Heat Flux by Radiation from the Bottom
Initial Values for the Simulation
Extension to 2D Model
Results and Discussion
Simulation of Gravimetric Drying Curves Using the 2D Model
Evaluation of Model Parameters
Gravimetric Drying Curve Using a 1DModel
Conclusion
Conflict of Interest

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