Hot Pressing of Reinforced Li-NMC All-Solid State Batteries with Sulfide Glass Electrolyte

Technical Report · Sat Sep 30 04:00:00 EDT 2023

DOI:https://doi.org/10.2172/2246589· OSTI ID:2246589

Yersak, Thomas ^[1]

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1. General Motors LLC, Detroit, MI (United States); General Motors LLC

The performance of solid-state batteries (SSBs) with sulfide solid-state electrolytes (SSEs) is limited because they are 10 - 30% porous. Porosity limits energy density of the composite cathode and provides a conduit for Li-metal deposits through the separator if operating specifications (e.g. current density, operating temperature, and pressure) are not strictly controlled. This project focused on demonstrating that hot press cell processing and appropriately formulated sulfide glass SSEs can help eliminate porosity to enable SSBs with energy density of ≥ 350 Wh/kg. The objective of the project was to research, develop, and test SSBs capable of achieving program performance metrics by implementing appropriately formulated sulfide glass SSEs and hot press cell processing in a dry room environment. In the composite cathode, hot pressing helps eliminate porosity to increase energy density by enabling thick composite cathodes with high active material loading. In the separator, hot pressing helps eliminate porosity that may otherwise provide a conduit for Li metal deposits to short the cell.

• Research Organization: General Motors LLC, Warren, MI (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation
• DOE Contract Number: EE0008857
• OSTI ID: 2246589
• Report Number(s): DOE-GM--08857
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
battery materials