Understanding the calendering processability of Li(Ni0.33Mn0.33Co0.33)O2-based cathodes

Calendering of Li(Ni0.33Mn0.33Co0.33)O2‐Based Cathodes: Analyzing the Link Between Process Parameters and Electrode Properties by Advanced Statistics

“…Figure 1 displays the compaction curves (ɛ vs. calender pressure) for all the roll temperatures and line speeds. As in our previous work, [24] the fitting with the modified Heckel equation including the un-calendered electrode was not possible due the abrupt decrease in ɛ at low pressures. Table 1 presents the fitted minimal attainable porosities (e min ) and compaction resistances (g C ) extracted from the Eq.…”

“…The hardness (H) represents the resistance to plastic deformation and is a very important feature as it is inversely related to the ɛ and ɛ min . [24] Figure 2A displays the H in terms of the applied calender pressure for the four different roll temperatures and two line speeds, while Figure 2C presents the results of the ANCOVA test. Increasing the temperature and the pressure produces an increase in the electrodes H (R 2 > 0), as expected.…”

“…[10] The quest towards the understanding and consequent optimization of the calendering process is still open and calls for more research in order to assess the electrode processability through this manufacturing step. In a previous work [24] we analyzed the impact of electrode formulation parameters (active material/carbon additive -binder relative ratio and amount of dispersing solvent) on the calendering processability and how that influences the electrode microstructure and electrochemical performance. In this work we aim to systematically study the three main calendering process parameters (namely applied calender pressure, roll temperature and line speed) over the electrode properties (such as porosity, mechanical properties and electronic conductivity) and how they determine the final capacity of NMC-based cathodes.…”

The ARTISTIC Online Calculator: Exploring the Impact of Lithium‐Ion Battery Electrode Manufacturing Parameters Interactively Through Your Browser

“…In addition to the degree of electrode compression, this model accounts for other two parameters: the consideration (or not) of the elastic recovery, and the CBD nanoporosity decrease. The elastic recovery is a phenomenon observed experimentally [22–24] and refers to the tendency of calendered electrodes to recover part of their initial thickness after a few hours/days of the calendering step. Concerning the CBD nanoporosity, to the best of our knowledge no evidence of its decrease during calendering was previously reported.…”

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

“…LIBs' manufacturing costs can be substantially lessened by a proper understanding of the effect of process parameters on electrode physical structure and ultimately on the cell electrochemical performance [5,6]. However, such an understanding is challenging due to the complex LIB's manufacturing chain involving several subprocesses (slurry preparation, coating, drying, calendering, cell assembly and testing) [7][8][9] and hundreds of process variables [6]. Some of the process variables may have an immediate effect on intermediate product properties, but some may only influence the final product.…”