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Related Experiment Video

Updated: May 10, 2026

Synthesis of Ionic Liquid Based Electrolytes, Assembly of Li-ion Batteries, and Measurements of Performance at High Temperature

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Published on: December 20, 2016

Latex migration in battery slurries during drying.

Sanghyuk Lim¹, Kyung Hyun Ahn, Masato Yamamura

¹School of Chemical and Biological Engineering, Institute of Chemical Processes, Seoul National University, Seoul 151-744, Korea.

Langmuir : the ACS Journal of Surfaces and Colloids

|June 11, 2013

Summary

Latex particle migration in drying battery slurries is suppressed by carboxymethyl cellulose (CMC) above entanglement concentration but enhanced when CMC coats graphite particles. Two-step migration occurs with graphite flocculation.

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Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications

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Area of Science:

Materials Science
Chemical Engineering
Colloid Science

Background:

Battery slurry formulation involves complex colloidal interactions during drying.
Understanding particle migration is crucial for uniform film formation and battery performance.
Carboxymethyl cellulose (CMC) is a common binder and rheology modifier in battery slurries.

Purpose of the Study:

To investigate the influence of carboxymethyl cellulose (CMC) concentration on latex particle migration during battery slurry drying.
To elucidate the mechanisms governing particle movement in relation to CMC adsorption and graphite particle interactions.
To demonstrate a novel fluorescence microscopy technique for monitoring complex film drying processes.

Main Methods:

Real-time fluorescence microscopy was employed to track latex particle movement.
Experiments were conducted on model battery slurries with varying CMC concentrations and graphite particle loadings.
Analysis focused on the time evolution of fluorescence signals to quantify particle migration dynamics.

Main Results:

Latex particle migration was suppressed above the entanglement concentration of CMC.
Significant enhancement in particle migration was observed when CMC fully covered graphite particle surfaces.
A distinct two-step migration behavior was identified when graphite particles flocculated due to depletion attraction at high CMC/graphite mass ratios.

Conclusions:

CMC concentration and its adsorption behavior critically control latex particle migration in drying battery slurries.
The study reveals distinct migration regimes dependent on CMC entanglement, surface coverage, and graphite particle interactions.
The developed real-time fluorescence microscopy method offers a powerful tool for characterizing and optimizing complex film drying processes in materials science.