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Item type:Publication, Access status: with files , Scalable dry processing of solid-state battery cathode composites via high-intensity mixing and assisted fluidized beds(Elsevier, 2027-01-15); ; ; ; This study investigates the scalable mixing capability of a vibration jet-assisted fluidized bed as well as a high-intensity mixer for the dry mixing of cathode composites for solid-state battery (SSB) cathodes. Despite having different working principles, both processes yield comparable microstructural and thus electrochemical results, proving their applicability for SSB manufacturing. Correlating structural analysis via SEM image analysis with electrochemical data reveals that the discharge capacity is mainly governed by the comminution of the solid electrolyte Li3InCl6 (LIC) and the homogeneity of the microstructure which ultimately determines the heterocontact number between active material and the ionic and electronic network. For both processes the stress intensity is identified as the main cause for comminution of LIC and deagglomeration of the active material LiFePO4 (LFP) and conductive additive carbon black (CB). An inverse relationship between electronic and ionic percolation is found: the mixing process disrupts long range electronic percolation due to CB deagglomeration and LIC comminution, whereas the smaller solid electrolyte particle size significantly increases the ionic percolation and therefore cell capacity. Overall, this study proves that both processes are promising for an up-scaled dry mixing process of SSB cathode materials.Publicationtype: Journal Article10 5 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Investigation of combined alkaline pretreatment and mechanoenzymatic processing for improved valorization of post-consumer textiles(Wiley-VCH, 2026-06-04); ; ; ; The continuous increase in textile waste, coupled with insufficient recycling and reuse strategies, has led to a growing issue of underutilized raw materials. Mixed textiles account for approximately 50% of global textile waste and commonly consist of tightly woven cotton blended with synthetic fibers, which complicated material separation and recovery. This study presents an integrated approach that combines mechanochemical pretreatment with subsequent mechanoenzymatic processing to valorize such complex waste streams. Using sodium hydroxide during milling enables higher solids loadings and supports efficient processing under moderate conditions. The mechanochemical approach yields glucose recoveries of up to 80.57% after 24 h. Furthermore, coupling mechanochemical and mechanoenzymatic treatment increases glucose yield by approximately 30% within 6 h, compared with conventional treatment strategies. This combined approach offers a scalable and sustainable pathway for converting mixed textile waste into valuable products. The process facilitates the selective recovery of polyethylene terephthalate (PET) while preserving its essential properties, enabling its reuse in subsequent applications or incorporation into established recycling pathways. Beyond the recovery of cellulose as glucose, this technology may enable the selective extraction of PET fibers, providing the basis for more efficient biotechnological processes and promoting enhanced circularity in PET fiber recycling.Publicationtype: Journal Article20 19 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Combination of mechanical treatment and enzymatic hydrolysis during post-consumer cotton waste processing(Wiley, 2026-05-13); ; ; ; With the continuously increasing volume of textile waste and the limitations of current recycling strategies, there is a growing need for the development of environmentally sustainable and efficient processing methods. Cellulose derived from post-consumer textile waste represents a promising and cost-effective substrate for enzymatic hydrolysis due to its abundance and low market value. This study investigates the synergistic effect of a cellulase enzyme mixture combined with wet rotor milling to enhance glucose yields during the enzymatic hydrolysis of cotton-based textile waste. The impact of mechanical energy input is assessed by varying milling durations in the presence and absence of enzymes. Enzyme-assisted milling enables a streamlined, single-step process, increasing glucose yield by approximately 12% compared to conventional hydrolysis for 6 h. Two iterative cycles of milling followed by incubation in a feed tank are evaluated. The highest glucose conversion (38%) is achieved by combining a premilling step with iterative cycles of milling performed with minimal milling time and subsequent enzymatic hydrolysis. Extended milling times reduce enzymatic activity, suggesting potential inhibitory effects under certain conditions. Overall, the findings support that integrating enzymatic hydrolysis into milling operations is a viable strategy for the partial recycling and valorization of textile waste.Publicationtype: Journal Article15 16 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Optimizing mechanical pretreatment of cotton textile waste to enhance enzymatic hydrolysisEnzymatic recycling processes of cotton from waste materials have gained increasing interest in recent years. Therefore, the aim of this study was to optimize the application of mechanical shear forces to end-of-life cotton-based textile suspensions, followed by an enzymatic hydrolysis to glucose. Mechanical pretreatment in a cutting mill followed by a wet-rotor-milling process was investigated by varying solids load and mill parameter settings. The results indicated that both a smaller gap width and higher solids load during mechanical pretreatment resulted in enhanced enzymatic hydrolysis. Additionally, it was found that a minimum amount of energy input while milling was necessary to enable a higher glucose yield. The relationship between energy input, enzymatic hydrolysis, and crystallinity facilitates the assessment of the effect of energy input within the milling process. Furthermore, a decrease in enzyme activity was observed with increasing solids load during enzymatic hydrolysis. Overall, the findings of this research suggest that wet milling presents a promising technology to improve the enzymatic hydrolysis of end-of-life cotton textiles.Publicationtype: Journal Article39 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Novel nanoparticle mixing approach for the production of solid-state battery hetero-agglomerates in vibrated fluidized beds(Elsevier, 2025-05-31); ; ; ; A vibrated fluidized bed with microjet assistance is utilized to mix heterogeneous submicron-sized battery materials. This process aims to improve the homogeneity and electrochemical performance of a solid-state cathode composite consisting of LiFePO4 (LFP), Li3InCl6 (LIC) and carbon black (CB). A downwards directed microjet was employed to enhance fluidization and mixing quality. The research involved a parametric study, examining various vibration intensities, microjet nozzle sizes, and fluidization times to determine the optimal conditions for achieving a homogeneous composite on the microscale. Scanning electron microscope (SEM) and focused ion beam SEM (FIB-SEM) imaging were used to assess the mixing quality and confirm the formation of heteroagglomerates. Assisted fluidization alone produces composites with inferior mixing quality, whereas a microjet significantly improves mixing. Electrochemical testing reveals that a vibrated fluidized bed alone is inadequate for mixing submicron-sized particles for battery applications, whereas the microjet enables the mixing and ionically bound active material.Publicationtype: Journal Article3 8 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , Investigation of a jet-based direct mixing process for improved structuring of conductive battery hetero-agglomerates(Multidisciplinary Digital Publishing Institute (MDPI), 2023-11); ; 20 42