Novel nanoparticle mixing approach for the production of solid-state battery hetero-agglomerates in vibrated fluidized beds

A vibrated fluidized bed with microjet assistance is utilized to mix heterogeneous submicron-sized battery materials. This process aims to improve the homogeneity and electrochemical performance of a solid-state cathode composite consisting of LiFePO4 (LFP), Li3InCl6 (LIC) and carbon black (CB). A downwards directed microjet was employed to enhance fluidization and mixing quality. The research involved a parametric study, examining various vibration intensities, microjet nozzle sizes, and fluidization times to determine the optimal conditions for achieving a homogeneous composite on the microscale. Scanning electron microscope (SEM) and focused ion beam SEM (FIB-SEM) imaging were used to assess the mixing quality and confirm the formation of heteroagglomerates. Assisted fluidization alone produces composites with inferior mixing quality, whereas a microjet significantly improves mixing. Electrochemical testing reveals that a vibrated fluidized bed alone is inadequate for mixing submicron-sized particles for battery applications, whereas the microjet enables the mixing and ionically bound active material.

Subjects

Heteroagglomerates | Microjet Assistance | Nanoparticle Mixing | Solid-state battery (ASSB) | Vibrated Fluidized Bed

DDC Class

621.3: Electrical Engineering, Electronic Engineering

541: Physical; Theoretical

Publication version

publishedVersion

Lizenz

https://creativecommons.org/licenses/by/4.0/

Name

1-s2.0-S0032591025003018-main.pdf

Type

Main Article

Size

6.56 MB

Format

Adobe PDF

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Novel nanoparticle mixing approach for the production of solid-state battery hetero-agglomerates in vibrated fluidized beds