Qualifying water-based electrode dispersions for the inkjet printing process: a requirements analysis

Kolb, Cara G.; Lehmann, Maja; Kriegler, Johannes; Lindemann, Jana-Lorena; Bachmann, Andreas; Zaeh, Michael F.

doi:10.1108/rpj-01-2022-0026

Cited by 3 publications

(2 citation statements)

References 118 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the predefined overlap, drops merge into a homogeneous layer structure [11]. To achieve a high printing resolution and reproducibility, the dispersion needs to meet stringent specifications [12]. First, the dispersion is required to exhibit a long shelf life to mitigate the formation of agglomerates and sediments.…”

Section: Introduction 1motivation and Backgroundmentioning

confidence: 99%

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

Kolb,

Sommer,

Lehmann

et al. 2023

Batteries

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introduction 1motivation and Backgroundmentioning

confidence: 99%

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

Kolb,

Sommer,

Lehmann

et al. 2023

Batteries

Self Cite

View full text Add to dashboard Cite

show abstract

“…Processes that enable selective material dispensing are predestined for the fabrication of these products. However, these technologies place special demands on the dispersions [8] . This applies in particular to drop-on-demand inkjet printing processes [9] , in which a high-resolution structure is formed by the dropwise deposition and the coalescence of a dispersion on a substrate [10] , [11] .…”

Section: Introductionmentioning

confidence: 99%

Modeling of the stability of water-based graphite dispersions using polyvinylpyrrolidone on the basis of the DLVO theory

Kolb

Lehmann²,

Kulmer³

et al. 2022

Heliyon

Self Cite

View full text Add to dashboard Cite

A priori evaluation of the printability of water-based anode dispersions in inkjet printing

Kolb

Lehmann

Teixeira

et al. 2023

Prod. Eng. Res. Devel.

View full text Add to dashboard Cite

Inkjet printing represents a disruptive additive manufacturing technology that has emerged as an innovative approach to generate customized lithium-ion batteries by tailored dispersions. However, electrode dispersions cause a complex non-Newtonian behavior which hampers the processability. This paper demonstrates a novel procedure for an a priori evaluation of the printability of aqueous graphite dispersions. Therefore, dispersions with a varying active material content were prepared and the printability was examined through a characterization of the drop formation and the drop deposition behavior. While the drop formation was observed by in-situ monitoring, the drop deposition was analyzed in ex-situ test setups. The rheological properties were systematically determined to calculate nondimensional numbers that describe the dispensing behavior. Consequently, their capability to predict the stability of the drop formation was evaluated. The results revealed that a graphite dispersion with a content of 2 m% allowed for a stable drop formation. No splashing occurred on the substrate during the drop deposition and sufficient wetting can be assumed due to a contact angle of below 90$$^\circ$$ ∘ . Conclusions were drawn to further enhance the active material content. Due to the universality of the proposed approach, it is expected to be applicable to different dispersion systems.

show abstract

Qualifying water-based electrode dispersions for the inkjet printing process: a requirements analysis

Cited by 3 publications

References 118 publications

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

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

Modeling of the stability of water-based graphite dispersions using polyvinylpyrrolidone on the basis of the DLVO theory

A priori evaluation of the printability of water-based anode dispersions in inkjet printing

Contact Info

Product

Resources

About