Smart Electrode Processing for Battery Cost Reduction

Schünemann, Jan-Hinnerk; Dreger, Henning; Bockholt, Henrike; Kwade, Arno

doi:10.1149/07301.0153ecst

Cited by 49 publications

(43 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Furthermore, the machine availability plays a significant role as a better machine utilization would allow to install less machines along the whole production line. For the processing parameters, the cathode slurry solids content has the highest impact on the manufacturing cost, which is in good agreement with estimations for conventional LIB production . Hence, replacing the wet coating process by a high‐viscosity extrusion process would result in a significant cost reduction if similar considerations for investment, throughput, and so on, were assumed.…”

Section: Resultssupporting

confidence: 80%

Solid versus Liquid—A Bottom‐Up Calculation Model to Analyze the Manufacturing Cost of Future High‐Energy Batteries

et al. 2020

View full text Add to dashboard Cite

All‐solid‐state batteries (ASSB) are promising candidates for future energy storage. However, only a little is known about the manufacturing costs for industrial production. Herein, a detailed bottom‐up calculation is performed to estimate the required investment and to facilitate comparison with conventional lithium‐ion batteries (LIB). Results indicate that sulfide‐based ASSBs can indeed be competitive if the material compatibility issues can be solved and production is successfully scaled. In contrast, oxide‐based ASSBs will probably not be able to compete if cost is the decisive factor. A sensitivity analysis with Monte Carlo simulation reveals that the inert gas atmosphere required for sulfide‐based ASSBs contributes little to the overall cell costs, whereas the sintering step for oxide‐based ASSBs is highly critical. The calculation also indicates that in‐house manufacturing of the lithium anode will be cheaper than purchasing the lithium foil externally if the cell producer has sufficient processing know‐how. Finally, the aerosol deposition method is investigated, revealing that a deposition rate far above 1000 mm3 min−1 would be required to make the technology economically feasible in ASSB production. The results of this study will help researchers and industry prioritize development efforts and push the scale‐up of future high‐energy batteries with improved performance.

show abstract

Section: Resultssupporting

confidence: 80%

Solid versus Liquid—A Bottom‐Up Calculation Model to Analyze the Manufacturing Cost of Future High‐Energy Batteries

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Post‐drying has been shown to be an important cost factor regarding energy costs in the manufacturing of Li‐ion batteries . In this process, moisture adsorbed from the air as well as residual moisture gets removed from the components of the battery, i.e., the electrode layers as well as the separator.…”

Section: Introductionmentioning

confidence: 99%

Moisture Adsorption Behavior in Anodes for Li‐Ion Batteries

et al. 2019

View full text Add to dashboard Cite

Excessive moisture adsorbed in electrodes and separators of a Li‐ion battery hampers its performance and is, therefore, removed to a certain amount in a post‐drying process. An insufficient understanding of the process results thereby in high process costs. Cost reductions can only be achieved efficiently with an improved process understanding by modeling this post‐drying process. As process modeling requires knowledge of sorption equilibria of water in the components of the battery, the sorption equilibria of water in different anodes are determined by means of a magnetic suspension balance and compared with different experimental setups. The measured data of the adsorption isotherms are described mathematically and give an impression of the amount of moisture, which is going to adjust at an equilibrium starting from a dry anode. Moreover, the materials of the anode are evaluated for their moisture sorption behavior. It is shown that mass‐weighted sorption equilibria of water in the materials yield a good approximation of equivalent equilibria in the anode. In the investigated anodes, the binder and rheology additive carboxymethyl cellulose (CMC) accounts for the most water uptake.

show abstract

“…But the remaining 25% are attributable to the battery production. One reason for this high amount is the numerous process steps required for electrode and cell production . The first and also important steps for the final battery performance are the mixing and coating processes.…”

Section: Introductionmentioning

confidence: 99%

“…In the drying step, the solvent has to be completely removed. Due to the fact that the energy costs contribute up to 37% to the total costs of the primary drying step, a high savings potential is indicated in case of a reduced solvent content …”

Section: Introductionmentioning

confidence: 99%

“…In the literature, some researchers investigated the potential of reducing the final costs by a decrease in solvent content . Schunemann et al showed that an increase in the solid content from 55 to 75 wt% could lead to a relative increase of drying speed up to 80%, which means a reduction of 23% in terms of energy costs in the drying step …”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Extrusion‐Based Processing of Cathodes: Influence of Solid Content on Suspension and Electrode Properties

2019

Self Cite

View full text Add to dashboard Cite

The influence of the solid content is investigated for cathodes with nickel cobalt manganese oxide (NCM) as an active material during the continuous dispersion in a twin‐screw extruder as well as during the coating and drying processes. Rheological and particle size distribution analyses are carried out to characterize the suspensions. Specifically, mechanical, structural, and electrochemical properties of the manufactured electrodes are determined. The presented results show that an increase in the solid content of the electrode suspension during the extrusion process results in a higher carbon black (CB) dispersion degree due to a higher energy input. At solid content above 80 wt%, delamination of conductive graphite and deposition of CB onto the active material occur. Furthermore, it is proved that within a range of 70–75 wt% solid content, the mechanical, conductive, and electrochemical performances can be enhanced.

show abstract

Smart Electrode Processing for Battery Cost Reduction

Cited by 49 publications

References 4 publications

Solid versus Liquid—A Bottom‐Up Calculation Model to Analyze the Manufacturing Cost of Future High‐Energy Batteries

Solid versus Liquid—A Bottom‐Up Calculation Model to Analyze the Manufacturing Cost of Future High‐Energy Batteries

Moisture Adsorption Behavior in Anodes for Li‐Ion Batteries

Extrusion‐Based Processing of Cathodes: Influence of Solid Content on Suspension and Electrode Properties

Contact Info

Product

Resources

About