A Priori Evaluation of the Printability of Water-Based Anode Dispersions in Inkjet Jetting

Kolb, Cara G.; Lehmann, Maja; Teixeira, Carys-May; Maleksaeedi, Saeed; Zaeh, Michael F.

doi:10.2139/ssrn.4374023

Cited by 1 publication

(4 citation statements)

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“…Preparation of the dispersions. The dispersion samples were prepared according to the procedure outlined in Kolb et al [34]. The sample composition and the specification of the constituents are provided in Table 1.…”

Section: Methodsmentioning

confidence: 99%

“…The content refers to the amount of active material employed. Following the findings of Kolb et al [34], drop formation was examined using samples with an altered surface tension. Therefore, a minimal quantity of the surfactant ethoxylated acetylenic diols (Surfynol 440, Evonik, Essen (Germany)) was added to adjust the surface tension in the target range between 35 and 40 mN m −1 [41].…”

Section: Methodsmentioning

confidence: 99%

“…This paper explores the role of binder derivatives for water-based graphite dispersions formulated for application in inkjet printing. We used a dispersion composition as a reference whose processability we have already demonstrated [34]. Following this procedure, two different CMC derivatives with strongly varying molecular weights were employed.…”

Section: Approachmentioning

confidence: 99%

“…Therefore, the viscosity was measured as a function of the shear rate from 10 0 to the limit of the measuring range 10 4 s −1 . Considering that the shear rate at drop ejection γeject is of the order of 10 5 to 10 6 s −1 for the print head system [34] used, the empirically obtained viscosity values were extrapolated by applying a fluid dynamic model. Depending on the sample-specific properties, either the power law or the Herschel-Bulkley model was employed.…”

Section: Dispersionsmentioning

confidence: 99%

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The Role of Binders for Water-Based Anode Dispersions in Inkjet Printing

Kolb,

Sommer,

Lehmann

et al. 2023

Batteries

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Binders play a pivotal role in the production and the operation of lithium-ion batteries. They influence a number of key dispersion characteristics and battery parameters. In the light of growing interest in additive manufacturing technologies, binders were found to decisively govern the processability due to the induced complex non-Newtonian behavior. This paper examines the relevance of various binder derivatives for aqueous graphite dispersions that can be employed in inkjet printing. Two different carboxymethyl cellulose (CMC) derivatives with strongly deviating molecular weights were employed. The impact of the inherent polymer characteristics on the processability and the electrode characteristics were explored. Therefore, miscellaneous studies were carried out at the dispersion, the electrode, and the cell levels. The results revealed that the CMC with the lower molecular weight affected most of the studied characteristics more favorably than the counterpart with a higher molecular weight. In particular, the processability, encompassing drop formation and drop deposition, the cohesion behavior, and the electrochemical characteristics, were positively impacted by the low-molecular-weight CMC. The adhesion behavior was enhanced using the high-molecular-weight CMC. This demonstrates that the selection of a suitable binder derivative merits close attention.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Approachmentioning

confidence: 99%

Section: Dispersionsmentioning

confidence: 99%

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