Page 32 - Guide to Lithium-ion Battery Solutions

Particle Characterization

Carbon black particle size and dispersion / aggregation evaluation Particle size distribution measurement and shape confirmation of active material particles

Laser Diffraction Particle Size Analyzer Dynamic Particle Image Analysis System

SALD-2300 iSpect DIA-10
™
• Black samples that easily absorb light can be detected • Abnormal particles (foreign matter, agglomeration) are
• Analysis while maintaining the state of slurry detected
• Monitoring of aggregation and dispersion status • Acquire images of individual particles and check the shape
• Detect trends and abnormal values by statistical analysis

The grain size and grain size distribution of carbon black have a great influence on an electrode's characteristics and the DIA can detect trace amounts of coarse particles. By detecting coarse particles in the positive electrode material powder, it
quality and yield of the final product. For proper evaluation, it is important to know the dispersion / aggregation state is possible to prevent deterioration of Lithium-ion Battery performance and improve safety.
of the target sample. SALD-2300 realizes highly sensitive measurement of scattered light, and can perform highly reliable
measurement even with weak scattered light from primary particles after dispersion processing.

Purpose Samples
Purpose Samples
Detection of coarse particles contained in Positive electrode material powder
Particle size distribution measurement of Carbon black particle positive electrode material
particles with different dispersed states

Data
Data

Measurement of dispersed solvent

Result Result

It can be seen that by the homogenizer dispersion treatment, aggregates of about 10 μm are dispersed in the fine Coarse particles in powder used for a positive electrode can lead to performance issues and degradation of the material.
particles in the submicron region. These particles can be detected and distinguished either through the image analysis window or a plot based on specific
parameters. This allows the quality of the powdered raw material to be easily verified.

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