Effect of drying temperature during coating on the adhesion force of anode
In the coating process,the drying process has a significant impact on the adhesion and appearance of the electrode.Four temperature parameters ("low-high-low","decreasing","increasing","high-low-high") are used to explore the influence of drying rate on the anode electrode.The typical drying rate curves of "transition phase-constant speed drying phase-decreasing speed drying phase" is presented under all temperature parameters,but has the longest constant speed drying phase and the highest oven utilization rate under "increasing" temperature parameters.Under this temperature parameter,the adhesion of anode electrode foil is the highest,reaching 1.797 N/25 mm,which is about 31.4％ higher than the " low-high-low" temperature set in normal production.The thermogravimetric test is used to visually compare the binder migration at different experi-mental temperatures,the binder distribution in the anode electrode is more uniform under "increasing" temperature parameters(70 ℃ increase to 110 ℃).
Li-ion batteryanodecoating processdrying temperatureelectrode dryingadhesion force
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