Developing an In-situ Formed Dynamic Protection Layer to Mitigate Lithium Interface Shifting: Preventing Dendrite Formation on Metallic Lithium Surface to Facilitate Long Cycle Life of Lithium Solid-State Batteries

Technical Report · Fri Dec 30 04:00:00 EST 2022

DOI:https://doi.org/10.2172/1907035· OSTI ID:1907035

Qu, Deyang ^[1]

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1. Univ. of Wisconsin, Milwaukee, WI (United States); University of Wisconsin-Milwaukee

After extensive research on various system, a fully lithiated Si anode material (Li_3.75Si) was synthesized. The high energy density, long cycle life anode demonstrated no apparent dendrite growth in an all-solid-state Li battery. A flexible solid-state electrolyte film with a thickness less than 50 μm was developed. All-solid-state Li full batteries were built and tested with NMC811, organic, organosulfide and sulfur cathode. Energy density of 1140 Wh/Kg at material level and 376 Wh/Kg at electrode level were demonstrated for over 500 cycles and with no apparent dendrite formation on the Li anode.

• Research Organization: Univ. of Wisconsin, Milwaukee, WI (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Office of Sustainable Transportation. Vehicle Technologies Office (VTO). Batteries for Advanced Transportation Technologies (BATT) Program
• DOE Contract Number: EE0008859
• OSTI ID: 1907035
• Report Number(s): FR-UWM-DE-EE0008859
• Country of Publication: United States
• Language: English

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