Fabrication of LiFePO4-Based Composite Cathode Deposited on LLTO Li-Ion Conducting Solid Electrolyte via Slurry Coating and Hot-Pressing

Jan Carlo Palomares; Mercy Jane Mora; Rinlee Butch M. Cervera

doi:10.4028/www.scientific.net/SSP.319.30

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Fabrication of LiFePO₄-Based Composite Cathode Deposited on LLTO Li-Ion Conducting Solid Electrolyte via Slurry Coating and Hot-Pressing

Abstract:

LiFePO₄(LFPO)-based composite cathode was deposited on Li_0.35La_0.55TiO₃(LLTO) solid electrolyte via slurry coating method. A composite cathode comprising of LiFePO₄, LLTO, and carbon black (CB) were mixed together in a slurry and deposited on a dense LLTO pellet substrate. The effects of heat treatment temperature and hot-pressing in the structure and densification of the deposited composite cathode were investigated. Cathode component precursors were analyzed for its particle size distribution using particle size analyzer and revealed a bimodal particle size distribution for each component materials. Structural characterization using X-ray powder diffraction (XRD) analysis revealed that distinct XRD peaks were observed which can be attributed to LFPO and LLTO for the deposited as-dried and heat treated (450 °C ) composite cathodes. Surface and cross-sectional SEM images revealed that hot-pressing provided denser morphology with smaller thickness as compared to the just as-dried and heat treated samples without the application of temperature with pressure.

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International Symposium on Advanced Material Research IV

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Periodical:

Solid State Phenomena (Volume 319)

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30-34

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.319.30

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Online since:

June 2021

Authors:

Jan Carlo Palomares*, Mercy Jane Mora, Rinlee Butch M. Cervera

Keywords:

Cathode Hot Pressing, Lithium Lanthanum Titanate, Solid Electrolyte, Solid-State Battery

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