Preparation, characterization, and monitoring of an aqueous graphite ink for use in binder jetting

Lehmann, Maja; Kolb, Cara G.; Klinger, Flavia; Zaeh, Michael F.

doi:10.1016/j.matdes.2021.109871

Cited by 17 publications

(6 citation statements)

References 24 publications

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“…The exact composition of the CB and the procedure to prepare it are trade secrets of HP Inc.. However, prior literature work details how to prepare similar binders which may be used in its stead [20]. To verify the residual C of the binders, we rely on pyrolysis using a Thermogravimetric Analyzer (TGA Q500, TA Instruments).…”

Section: Powder and Binder Characterizationmentioning

confidence: 99%

Site-Specific Alloying Through Binder Jet 3d Printing

Chiang¹,

Davidson²,

Wheeler³

et al. 2023

Preprint

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Section: Powder and Binder Characterizationmentioning

confidence: 99%

Site-Specific Alloying Through Binder Jet 3d Printing

Chiang¹,

Davidson²,

Wheeler³

et al. 2023

Preprint

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“…The test setup described in Lehmann et al [46] was utilized for the monitoring of the drop formation. The drops were generated by a piezoelectric print head (Spectra SL-128 AA, Fujifilm, Tokyo (Japan)) with a nozzle diameter of 50 µm.…”

Section: Drop Monitoring 231 Drop Formationmentioning

confidence: 99%

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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“…While polyvinylpyrrolidone (PVP) was reported to be a suitable dispersant for graphite in water (Kolb et al , 2021; Lehmann et al , 2021), Triton X-100 (TX-100) was observed to disperse conductive additives efficiently (Kolb et al , 2021). In addition, there are few studies on the stabilization of cathode active materials.…”

Section: Analysis Of the Electrode And Its Influence On The Battery C...mentioning

confidence: 99%

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

Kolb

Lehmann

Kriegler

et al. 2022

RPJ

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Purpose This paper aims to present a requirements analysis for the processing of water-based electrode dispersions in inkjet printing. Design/methodology/approach A detailed examination of the components and the associated properties of the electrode dispersions has been carried out. The requirements of the printing process and the resulting performance characteristics of the electrode dispersions were analyzed in a top–down approach. The product and process side were compared, and the target specifications of the dispersion components were derived. Findings Target ranges have been identified for the main component properties, balancing the partly conflicting goals between the product and the process requirements. Practical implications The findings are expected to assist with the formulation of electrode dispersions as printing inks. Originality/value Little knowledge is available regarding the particular requirements arising from the systematic qualification of aqueous electrode dispersions for inkjet printing. This paper addresses these requirements, covering both product and process specifications.

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Preparation, characterization, and monitoring of an aqueous graphite ink for use in binder jetting

Cited by 17 publications

References 24 publications

Site-Specific Alloying Through Binder Jet 3d Printing

Site-Specific Alloying Through Binder Jet 3d Printing

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

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

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