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Category:OSWa6c6b673d314531e83bce1010db7a848: Difference between revisions
Category:OSWa6c6b673d314531e83bce1010db7a848 (view source)
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Slurry mixing involves combining active materials, conductive additives, binders, and solvents to create a homogeneous electrode slurry mixture. This slurry is then coated onto a current collector to form the electrode. Proper slurry mixing ensures optimal performance, consistency, and longevity of the batteries. | Slurry mixing involves combining active materials, conductive additives, binders, and solvents to create a homogeneous electrode slurry mixture<ref>Ayerbe, et al. Adv. Energy Mater. 2022, 12, 2102696. DOI: {{Template:Viewer/Link|page=|url=https://doi.org/10.1002/aenm.202102696|label=10.1002/aenm.202102696}}</ref> . This slurry is then coated onto a current collector to form the electrode. Proper slurry mixing ensures optimal performance, consistency, and longevity of the batteries. | ||
== Components of the Slurry == | == Components of the Slurry == | ||
# {{Template:Viewer/Link|page=|url=https://w3id.org/emmo/domain/electrochemistry#electrochemistry_79d1b273_58cd_4be6_a250_434817f7c261|label=Active Material}}: The main component responsible for electrochemical reactions. Examples include lithium cobalt oxide (LCO) | # {{Template:Viewer/Link|page=|url=https://w3id.org/emmo/domain/electrochemistry#electrochemistry_79d1b273_58cd_4be6_a250_434817f7c261|label=Active Material}}: The main component responsible for electrochemical reactions. Examples include lithium cobalt oxide (LCO) and graphite. | ||
# {{Template:Viewer/Link|page=|url=https://w3id.org/emmo/domain/electrochemistry#electrochemistry_82fef384_8eec_4765_b707_5397054df594|label=Conductive Additives}}: Materials like carbon black or carbon nanotubes that enhance electrical conductivity. | # {{Template:Viewer/Link|page=|url=https://w3id.org/emmo/domain/electrochemistry#electrochemistry_82fef384_8eec_4765_b707_5397054df594|label=Conductive Additives}}: Materials like carbon black or carbon nanotubes that enhance electrical conductivity. | ||
# {{Template:Viewer/Link|page=|url=https://w3id.org/emmo/domain/electrochemistry#electrochemistry_68eb5e35_5bd8_47b1_9b7f_f67224fa291e|label=Binders}}: Polymers such as polyvinylidene fluoride (PVDF) that provide mechanical stability and adhesion to the current collector. | # {{Template:Viewer/Link|page=|url=https://w3id.org/emmo/domain/electrochemistry#electrochemistry_68eb5e35_5bd8_47b1_9b7f_f67224fa291e|label=Binders}}: Polymers such as polyvinylidene fluoride (PVDF) that provide mechanical stability and adhesion to the current collector. | ||
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== Mixing Process == | == Mixing Process == | ||
{{#ev:youtube|XQhanrs2BI0|||A video demonstrating the consistency of lithium-ion battery electrode slurry consistency after different stages of mixing}} | |||
=== Preparation === | === Preparation === | ||
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=== Mixers === | === Mixers === | ||
{{Template:Viewer/Media | |||
| image_size = 300 | |||
| mode = default | |||
| textdata = File:OSW814dfef86dcc4345aa6818a70da11c34.jpg{{!}}an image of a pilot-scale battery electrode slurry mixer; | |||
}} | |||
* '''Planetary Mixers''': Ideal for small-scale or laboratory use, providing thorough mixing with minimal shear. | * '''Planetary Mixers''': Ideal for small-scale or laboratory use, providing thorough mixing with minimal shear. | ||
* '''High-shear Mixers''': Suitable for large-scale production, offering efficient particle dispersion and homogenization. | * '''High-shear Mixers''': Suitable for large-scale production, offering efficient particle dispersion and homogenization. | ||
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== Process Parameters == | == Process Parameters == | ||
* '''Temperature''': Maintain a controlled temperature (typically 25-40°C) to ensure binder solubility and prevent solvent evaporation. | |||
* '''Mixing Speed''': Optimize mixing speed based on the slurry viscosity and desired particle size distribution. High speeds enhance dispersion but may cause excessive heating. | |||
* '''Mixing Time''': Ensure adequate mixing time to achieve homogeneity without over-mixing, which can cause degradation of materials. | |||
== Quality Control == | == Quality Control == | ||
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=== Particle Size Analysis === | === Particle Size Analysis === | ||
* | * A grindometer is used to assess the particle size distribution in a battery slurry, which is critical for ensuring uniformity and optimal performance. By measuring how finely the active materials and conductive agents are dispersed, the grindometer helps in determining the slurry’s consistency, which directly impacts the battery's electrochemical properties and cycle life. | ||
{{Template:Viewer/Link|page=File:OSW074222f7f1c346c887f186eba778adb3.mp4}} | |||
<!-- {{Template:Viewer/Media | |||
| image_size = 600 | |||
| mode = default | |||
| textdata = File:OSW074222f7f1c346c887f186eba778adb3.mp4{{!}}A video demonstrating the use of a grindometer to evaluate the quality of an electrode slurry; | |||
}} --> | |||
=== Homogeneity Testing === | === Homogeneity Testing === | ||
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