Calendering effects on the physical and electrochemical properties of Li[Ni1/3Mn1/3Co1/3]O2 cathode

Zheng, Honghe; Tan, Li; Liu, Gao; Song, Xiangyun; Battaglia, Vincent

doi:10.1016/j.jpowsour.2012.02.001

Cited by 262 publications

(244 citation statements)

References 27 publications

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“…Inhomogeneous distribution thereof will adversely affect both electron transfer from the current collector through the electrode and charge transfer at the active particle -electrolyte interfacial area. 8,19,49,50 Electrode processing plays an important role in the electrode microstructure formation. Salient results from the aforementioned experiments are presented below to elucidate the role of evaporation leading to the underlying constituent phase rearrangement and resulting influence on electrode performance.…”

Section: Results and Discussion: Experimentsmentioning

confidence: 99%

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Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Stein

Mistry

Mukherjee

2017

J. Electrochem. Soc.

105

117

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Electrode processing based on the state-of-the-art materials represents a scientific opportunity toward a cost-effective measure for improving the lithium-ion battery performance. In this regard, perhaps the most important is the drying step in a typical non-aqueous based slurry processing which can profoundly impact the electrode microstructure and hence performance. Solvent evaporation during drying plays a critical role in the redistribution of the particulate phases consisting of active particle, conductive additive and binder. In this work, we attempt to provide a mechanistic understanding of the role of solvent evaporation on the electrode characteristics and performance via a combined experimental and theoretical analysis. This study elucidates that a non-uniform distribution of the constituent phases, especially the relatively mobile conductive additive and binder, can develop which depends on the solvent evaporation, particle diffusion and sedimentation attributes. Experimental results and theoretical analysis reveal the impact of evaporation rate on the conductive additive and binder distribution in the electrode microstructure and resulting electrochemical performance. Our analysis has shown that a slower two-stage drying, as opposed to a high-rate single-stage drying, allows for a favorable distribution of binder and conductive additive, thus reducing internal cell resistance and improving electrochemical performance. Increasing concerns about depleting fossil fuel reserves, energy security, and climate change have given rise to interest in the adoption of renewable energy in place of traditional, petroleum-based fuels. The implementation and usage of renewable energies have been limited due to lack of efficient storage and transportation infrastructure. Recent improvements in the energy density and durability of lithiumion batteries (LIBs) have made them an increasingly attractive means of energy storage. [1][2][3][4] Further improvements in lithium-ion technology would increase the viability of widespread adoption of electric vehicles and renewable energy integration into the electric grid. For example, improvements in the capacity of LIBs would not only improve the effective range of electric vehicles, 5,6 but also improve their cycle life by reducing the depth of discharge, which in turn increases the viability of LIBs for use in grid energy storage applications. 7The performance of Li-ion batteries depends on the electrode materials, the choice of electrolyte, and the cell architecture.4,8 A typical LIB positive electrode (cathode) is composed of a combination of Li-containing active material, conductive additive, polymeric binder, and pore space that is filled with an electrolyte. Typically, these are created by casting out and drying a thin film of slurry containing these multi-phase components. 19 but little attention is paid to the physical understanding of the electrode processing. The importance of this electrode preparation step cannot be overemphasized. In addition to determining the cel...

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Section: Results and Discussion: Experimentsmentioning

confidence: 99%

“…During electrode calendering, compaction tends to enhance the apparent energy density as well as improves adhesion to the current collector. 19,[44][45][46] After being weighed, the electrodes are dried overnight in a vacuum oven at 120…”

Section: Method: Experimentsmentioning

confidence: 99%

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Stein

Mistry

Mukherjee

2017

J. Electrochem. Soc.

105

117

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“…1 and 2. However, we should mention again that our electric conductivity is measured with the real cathode coated on Al current collector, if too high electric conductivity values sound controversial comparing to the previous work, 12) in which cathode layer was coated on non-conductive glass substrate. Moreover, this four-point probe measurement can give reliable results only if the cathode thickness is around or higher than 50 um.…”

Section: Resultsmentioning

confidence: 81%

“…The latter has sometimes been considered as more important factors by many manufacturers. Unfortunately, there are limited research works on electrode design parameters such as density and thickness, [8][9][10][11][12][13][14][15] and moreover they are not various and wide enough to understand many parameters in a variety of points of view.…”

Section: Introductionmentioning

confidence: 99%

“…As for cathode active materials, Zheng et al [11][12][13] controlled the cathode porosity from 50% to 0% while maintaining the electrode loading level, which meant that the thickness would be thinner with decreasing porosity, and found some relationship between porosity and electrochemical performance. Recently, Chen et al 14) and Cho et al 15) tried to correlate experimental electrochemical data with simulated results under different porosity and thickness conditions, respectively.…”

Section: Introductionmentioning

confidence: 99%

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Effect of LiCoO₂Cathode Density and Thickness on Electrochemical Performance of Lithium-Ion Batteries

Choi¹,

Son²,

Ryou³

et al. 2013

Journal of Electrochemical Science and Technology

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ABSTRACT:The consequences of electrode density and thickness for electrochemical performance of lithiumion cells are investigated using 2032-type coin half cells. While the cathode composition is maintained by 90:5:5 (wt.%) with LiCoO 2 active material, Super-P electric conductor and polyvinylidene fluoride polymeric binder, its density and thickness are independently controlled to 20, 35, 50 um and 1.5, 2.0, 2.5, 3.0, 3.5 g cm , respectively, which are based on commercial lithium-ion battery cathode system. As the cathode thickness is increased in all densities, the rate capability and cycle life of lithium-ion cells become significantly worse. On the other hand, even though the cathode density shows similar behavior, its effect is not as high as the thickness in our experimental range. This trend is also investigated by cross-sectional morphology, porosity and electric conductivity of cathodes with different densities and thicknesses. This work suggests that the electrode density and thickness should be chosen properly and mentioned in detail in any kinds of research works.

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The Influence of Slurry Rheology on Lithium‐ion Electrode Processing

et al. 2018

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Calendering effects on the physical and electrochemical properties of Li[Ni1/3Mn1/3Co1/3]O2 cathode

Cited by 262 publications

References 27 publications

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Effect of LiCoO₂Cathode Density and Thickness on Electrochemical Performance of Lithium-Ion Batteries

The Influence of Slurry Rheology on Lithium‐ion Electrode Processing

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Calendering effects on the physical and electrochemical properties of Li[Ni1/3Mn1/3Co1/3]O2 cathode

Cited by 262 publications

References 27 publications

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Effect of LiCoO2Cathode Density and Thickness on Electrochemical Performance of Lithium-Ion Batteries

The Influence of Slurry Rheology on Lithium‐ion Electrode Processing

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Effect of LiCoO₂Cathode Density and Thickness on Electrochemical Performance of Lithium-Ion Batteries