Numerical and Experimental Study of Suspensions Containing Carbon Blacks Used as Conductive Additives in Composite Electrodes for Lithium Batteries

Cerbelaud, Manuella; Lestriez, Bernard; Ferrando, Riccardo; Videcoq, Arnaud; Richard‐Plouet, Mireille; Caldés, Maria Teresa; Guyomard, Dominique

doi:10.1021/la404693s

Cited by 33 publications

(35 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These interactions represent the friction exerted by the fluid on the colloid that is moving and the collisions between solvent molecules and the colloid, respectively. According to our previous study, 31 which has shown the importance of taking into account the shape of carbon additives, carbon black aggregates are modeled as nondeformable fractal-like aggregates composed of small spheres (elementary particles) linked together. Each carbon black aggregate move indeed as a single entity in the simulations.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Understanding the Structure of Electrodes in Li-Ion Batteries: A Numerical Study

Cerbelaud

Lestriez

Videcoq

et al. 2015

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

“…Recently we have shown that it is possible to consider the real shape of carbon black aggregates in the framework of Brownian dynamics simulations. 31 In Ref. 31 we have indeed studied both experimentally and numerically colloidal suspensions only composed of carbon particles (carbon black aggregates or spherical carbon particles).…”

mentioning

confidence: 99%

Understanding the Structure of Electrodes in Li-Ion Batteries: A Numerical Study

Cerbelaud

Lestriez

Videcoq

et al. 2015

J. Electrochem. Soc.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Recent studies from the authors' research group have demonstrated the impact of solvent evaporation rate on the favorable aggregation of conductive additives via mesoscale computational modeling, however requiring experimental understanding of the role of evaporation in the drying step on the electrode microstructure and performance. 29,30 There are a handful of other recent studies employing particle based simulations [31][32][33][34][35] which are farther away from typical electrode preparation and include rather restrictive physical assumptions and/or property values. Figure 1 schematically demonstrates the stages during drying of a typical electrode slurry cast on a substrate (current collector).…”

mentioning

confidence: 99%

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

Stein

Mistry

Mukherjee

2017

J. Electrochem. Soc.

101

117

View full text Add to dashboard Cite

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...

show abstract

“…Both factors can in principle alter the value of / c . Previous simulations of carbon blacks aggregates have shown that a high colloid anisotropy decreases / c [37]. However, since anisotropy is much weaker in the case of alumina, / c is expected to be essentially unaffected by it.…”

Section: Resultsmentioning

confidence: 90%

How colloid–colloid interactions and hydrodynamic effects influence the percolation threshold: A simulation study in alumina suspensions

Laganapan

Mouas

Videcoq

et al. 2015

Journal of Colloid and Interface Science

Self Cite

View full text Add to dashboard Cite

Numerical and Experimental Study of Suspensions Containing Carbon Blacks Used as Conductive Additives in Composite Electrodes for Lithium Batteries

Cited by 33 publications

References 30 publications

Understanding the Structure of Electrodes in Li-Ion Batteries: A Numerical Study

Understanding the Structure of Electrodes in Li-Ion Batteries: A Numerical Study

Mechanistic Understanding of the Role of Evaporation in Electrode Processing

How colloid–colloid interactions and hydrodynamic effects influence the percolation threshold: A simulation study in alumina suspensions

Contact Info

Product

Resources

About