Rheological properties and stability of NMP based cathode slurries for lithium ion batteries

Bauer, Werner; Nötzel, Dorit

doi:10.1016/j.ceramint.2013.08.137

Cited by 176 publications

(148 citation statements)

References 25 publications

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“…This shear rate corresponds to a coating velocity of 10 mm/s and a doctor blade distance of 300 µm which has been applied for coating experiments. The viscosity value of 2.2 Pa·s is comparable to literature data [18]. In order to produce thinner films, the doctor blade distance was reduced to 210 µm.…”

Section: Tape-casted Nmc Electrodesmentioning

confidence: 77%

“…These ingredients were mixed in defined weight proportions. For achieving a controlled coating process leading to homogeneous thickness and particle density distribution, preparation of a stable and homogeneous dispersion of active material and inactive components is required [18]. Therefore, slurries with different weight proportions of active and inactive components were prepared and coated onto 15 µm thick aluminum foils.…”

Section: Tape-casted Nmc Electrodesmentioning

confidence: 99%

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Manufacturing of advanced Li(NiMnCo)O₂electrodes for lithium-ion batteries

et al. 2015

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Lithium-ion batteries require an increase in cell life-time as well as an improvement in cycle stability in order to be used as energy storage systems, e.g. for stationary devices or electric vehicles. Nowadays, several cathode materials such as Li(NiMnCo)O 2 (NMC) are under intense investigation to enhanced cell cycling behavior by simultaneously providing reasonable costs. Previous studies have shown that processing of three-dimensional (3D) micro-features in electrodes using nanosecond laser radiation further increases the active surface area and therefore, the lithium-ion diffusion cell kinetics. Within this study, NMC cathodes were prepared by tape-casting and laser-structured using nanosecond laser radiation. Furthermore, laser-induced breakdown spectroscopy (LIBS) was used in a first experimental attempt to analyze the lithium distribution in unstructured NMC cathodes at different state-of-charges (SOC). LIBS will be applied to laser-structured cathodes in order to investigate the lithium distribution at different SOC. The results will be compared to those obtained for unstructured electrodes to examine advantages of 3D micro-structures with respect to lithium-ion diffusion kinetics.Keywords: Laser-induced breakdown spectroscopy, nanosecond laser, laser structuring, lithium-ion battery, lithium nickel manganese cobalt oxide, 3D battery.

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Section: Tape-casted Nmc Electrodesmentioning

confidence: 77%

Section: Tape-casted Nmc Electrodesmentioning

confidence: 99%

Manufacturing of advanced Li(NiMnCo)O₂electrodes for lithium-ion batteries

et al. 2015

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“…Conventionally, Li‐ion battery electrodes are manufactured by coating N‐methyl‐pyrrolidone (NMP) based formulations of active cathode or anode materials and a poly(vinyl difluoride) (PVDF) binder, followed by solvent evaporation . The high solid content slurry mixing is difficult and the dispersion requires a continuous mixing upon storage due to the physico‐chemical instability of the slurry . The electrode drying is energy consuming and solvent recycling is mandatory due to the high toxicity and cost of NMP.…”

Section: Methodsmentioning

confidence: 99%

High Energy Li‐Ion Electrodes Prepared via a Solventless Melt Process

Astafyeva¹,

Dousset²,

Bureau³

et al. 2020

Batteries & Supercaps

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High areal density and high energy Li‐ion electrodes were prepared using a high throughput green, solventless and inexpensive melt process leading to electrodes of controlled porosity. Melt formulations were developed for NCA cathodes and graphite anodes. The formulations were based on commercially available and inexpensive elastomeric or thermoplastic binders, conventional conducting fillers and >90 wt% electrode active materials. A large range of loadings could be achieved, from 4 to 40 mg cm−2 single side. Electrochemical performances in half cells (coin cells) are reported. High capacity and cyclability for high loadings of NCA cathodes and graphite anodes were demonstrated. Areal capacities over 5 mAh.cm−2 in coin cells were obtained at a C/5 rate. Cycling at high rates, up to 5 C was demonstrated.

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“…Overall, all samples show a shear thinning behavior. Upon shearing the sample, the viscosity gradually decreases, implying that the network of CNTs and binder breaks up and smaller agglomerates are formed . The sample with low content of CNTs, such as C03B18, appears to easily break up into smaller agglomerates at a high rate and displays more shear thinning behavior than the samples with high content of CNTs.…”

Section: Electrode Chemistry and Formulationmentioning

confidence: 99%

Optimization of Carbon Nanotubes as Conductive Additives for High‐Energy‐Density Electrodes for Lithium‐Ion Batteries

Yoo

Park

et al. 2019

Energy Tech

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Development of a high‐energy‐density electrode to use in lithium‐ion batteries (LIBs) is imperative for automotive applications. Although extensive efforts are put on developing high‐capacity cathode and anode materials for high‐energy‐density electrodes, challenging issues involving both the cathode and anode hinder practical application of the materials developed to date. Therefore, a practical approach to increase the energy density of LIBs is to design an electrode that has higher active material loading and a low fraction of nonactive materials. The present study demonstrates the use of carbon nanotubes (CNTs) as conductive additives for a high‐energy‐density electrode and reports the effect of the content of CNTs and binder on the slurry, electrode, and electrochemical performance of a cell. The electrochemical results and thermomechanical analysis reveal that the conductive network formed by CNTs and the binder plays a role in maintaining electrode integrity, thereby influencing cycle retention. Moreover, an electrode resistance analysis combined with electrochemical results shows that the ratio of CNTs and binder is a crucial factor in determining the rate capability. This understanding of the conductive network of CNTs/binder offers an insight into strategies to design high‐energy‐density LIBs.

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Rheological properties and stability of NMP based cathode slurries for lithium ion batteries

Cited by 176 publications

References 25 publications

Manufacturing of advanced Li(NiMnCo)O₂electrodes for lithium-ion batteries

Manufacturing of advanced Li(NiMnCo)O₂electrodes for lithium-ion batteries

High Energy Li‐Ion Electrodes Prepared via a Solventless Melt Process

Optimization of Carbon Nanotubes as Conductive Additives for High‐Energy‐Density Electrodes for Lithium‐Ion Batteries

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Rheological properties and stability of NMP based cathode slurries for lithium ion batteries

Cited by 176 publications

References 25 publications

Manufacturing of advanced Li(NiMnCo)O2electrodes for lithium-ion batteries

Manufacturing of advanced Li(NiMnCo)O2electrodes for lithium-ion batteries

High Energy Li‐Ion Electrodes Prepared via a Solventless Melt Process

Optimization of Carbon Nanotubes as Conductive Additives for High‐Energy‐Density Electrodes for Lithium‐Ion Batteries

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Manufacturing of advanced Li(NiMnCo)O₂electrodes for lithium-ion batteries

Manufacturing of advanced Li(NiMnCo)O₂electrodes for lithium-ion batteries